{"id":34767,"date":"2026-09-21T06:56:46","date_gmt":"2026-09-21T06:56:46","guid":{"rendered":"https:\/\/www.woodwardfab.com\/blog\/?p=34767"},"modified":"2026-09-29T07:45:54","modified_gmt":"2026-09-29T07:45:54","slug":"sheet-metal-guage-chart","status":"publish","type":"post","link":"https:\/\/www.woodwardfab.com\/blog\/sheet-metal-guage-chart\/","title":{"rendered":"How to Read a Sheet Metal Gauge Chart: Gauge, Thickness &amp; Material Explained"},"content":{"rendered":"\n<!-- =========================================================\nWOODWARD FAB BLOG\nSheet Metal Gauge Chart & Thickness Guide\nWordPress Responsive HTML\n========================================================= -->\n\n<style>\n  .wf-blog {\n    max-width: 1100px;\n    margin: 0 auto;\n    padding: 20px;\n    color: #222;\n    font-family: Arial, Helvetica, sans-serif;\n    line-height: 1.7;\n    font-size: 17px;\n  }\n\n  .wf-blog h1,\n  .wf-blog h2,\n  .wf-blog h3 {\n    color: #1f1f1f;\n    line-height: 1.3;\n    margin-top: 35px;\n    margin-bottom: 15px;\n  }\n\n  .wf-blog h1 {\n    font-size: 38px;\n    margin-top: 10px;\n  }\n\n  .wf-blog h2 {\n    font-size: 29px;\n  }\n\n  .wf-blog h3 {\n    font-size: 22px;\n  }\n\n  .wf-blog p {\n    margin: 0 0 18px;\n  }\n\n  .wf-blog strong {\n    font-weight: 700;\n  }\n\n  .wf-blog a {\n    color: #b00000;\n    text-decoration: underline;\n    font-weight: 600;\n  }\n\n  \/* Hero Image *\/\n  .wf-hero {\n    margin: 25px 0 35px;\n  }\n\n  .wf-hero img {\n    width: 100%;\n    height: auto;\n    display: block;\n    border-radius: 6px;\n  }\n\n  .wf-caption {\n    font-size: 14px;\n    color: #666;\n    margin-top: 8px;\n    font-style: italic;\n  }\n\n  \/* Quick Answer Box *\/\n  .wf-answer-box {\n    background: #f5f5f5;\n    border-left: 5px solid #b00000;\n    padding: 22px 25px;\n    margin: 25px 0 35px;\n    border-radius: 4px;\n  }\n\n  .wf-answer-box strong {\n    display: block;\n    margin-bottom: 8px;\n    font-size: 19px;\n  }\n\n  \/* Tables *\/\n  .wf-table-wrapper {\n    width: 100%;\n    overflow-x: auto;\n    margin: 25px 0 30px;\n  }\n\n  .wf-table {\n    width: 100%;\n    border-collapse: collapse;\n    min-width: 600px;\n    background: #fff;\n  }\n\n  .wf-table th {\n    background: #222;\n    color: #fff;\n    padding: 13px;\n    text-align: left;\n    font-weight: 700;\n  }\n\n  .wf-table td {\n    padding: 12px 13px;\n    border: 1px solid #ddd;\n  }\n\n  .wf-table tr:nth-child(even) {\n    background: #f7f7f7;\n  }\n\n  \/* Image Cards *\/\n  .wf-image-section {\n    margin: 30px 0;\n  }\n\n  .wf-image-section img {\n    width: 100%;\n    max-width: 900px;\n    height: auto;\n    display: block;\n    margin: 0 auto;\n    border-radius: 6px;\n  }\n\n  \/* Lists *\/\n  .wf-blog ul,\n  .wf-blog ol {\n    margin: 0 0 22px 25px;\n    padding-left: 15px;\n  }\n\n  .wf-blog li {\n    margin-bottom: 9px;\n  }\n\n  \/* Process Box *\/\n  .wf-process-box {\n    background: #fafafa;\n    border: 1px solid #ddd;\n    padding: 22px 25px;\n    margin: 25px 0;\n    border-radius: 6px;\n  }\n\n  \/* FAQ *\/\n  .wf-faq {\n    border-top: 1px solid #ddd;\n    margin-top: 30px;\n  }\n\n  .wf-faq-item {\n    padding: 18px 0;\n    border-bottom: 1px solid #ddd;\n  }\n\n  .wf-faq-question {\n    font-size: 19px;\n    font-weight: 700;\n    margin-bottom: 8px;\n  }\n\n  \/* Related Resources *\/\n  .wf-related {\n    background: #f5f5f5;\n    padding: 25px;\n    margin: 35px 0;\n    border-radius: 6px;\n  }\n\n  .wf-related h3 {\n    margin-top: 0;\n  }\n\n  \/* CTA *\/\n  .wf-cta {\n    background: #222;\n    color: #fff;\n    padding: 30px;\n    margin: 40px 0 20px;\n    border-radius: 6px;\n    text-align: center;\n  }\n\n  .wf-cta h2 {\n    color: #fff;\n    margin-top: 0;\n  }\n\n  .wf-cta a {\n    display: inline-block;\n    background: #fff;\n    color: #222;\n    padding: 12px 22px;\n    text-decoration: none;\n    border-radius: 4px;\n    margin-top: 10px;\n    font-weight: 700;\n  }\n\n  \/* Mobile *\/\n  @media (max-width: 768px) {\n\n    .wf-blog {\n      padding: 15px;\n      font-size: 16px;\n    }\n\n    .wf-blog h1 {\n      font-size: 30px;\n    }\n\n    .wf-blog h2 {\n      font-size: 25px;\n    }\n\n    .wf-blog h3 {\n      font-size: 20px;\n    }\n\n    .wf-answer-box,\n    .wf-process-box,\n    .wf-related,\n    .wf-cta {\n      padding: 20px;\n    }\n\n    .wf-table-wrapper {\n      overflow-x: auto;\n      -webkit-overflow-scrolling: touch;\n    }\n\n  }\n\n  @media (max-width: 480px) {\n\n    .wf-blog {\n      padding: 12px;\n      font-size: 15.5px;\n    }\n\n    .wf-blog h1 {\n      font-size: 27px;\n    }\n\n    .wf-blog h2 {\n      font-size: 23px;\n    }\n\n    .wf-blog h3 {\n      font-size: 19px;\n    }\n\n    .wf-answer-box {\n      padding: 17px;\n    }\n\n    .wf-cta {\n      padding: 22px 15px;\n    }\n  }\n<\/style>\n\n\n<article class=\"wf-blog\">\n\n\n  <!-- =====================================================\n  INTRODUCTION\n  ====================================================== -->\n\n  <p>\n    Understanding sheet metal thickness is essential when selecting material\n    for fabrication, repair, bending, cutting, or forming. A\n    sheet metal gauge chart provides a convenient way to\n    understand the relationship between a metal&#8217;s gauge number and its actual\n    thickness.\n  <\/p>\n\n  <p>\n    However, gauge numbers can be confusing because a lower gauge number\n    generally means thicker metal, while a higher gauge number means thinner\n    metal.\n  <\/p>\n\n  <p>\n    For example, 18-gauge steel is thicker than 20-gauge steel. The actual\n    thickness represented by each gauge can also vary depending on the type of\n    metal. Understanding these differences helps fabricators choose the\n    appropriate material and avoid errors during fabrication.\n  <\/p>\n\n  <p>\n    In this guide, we&#8217;ll explain how to read a sheet metal gauge chart,\n    convert gauge to thickness, understand material differences, and determine\n    which thickness may be suitable for a project.\n  <\/p>\n\n\n  <!-- =====================================================\n  WHAT IS GAUGE\n  =================================================ho===== -->\n\n  <h2>What Is a Sheet Metal Gauge?<\/h2>\n\n  <p>\n    A sheet metal gauge is a numbering system traditionally used to identify\n    the thickness of sheet metal. Instead of specifying a material only by its\n    thickness in inches or millimeters, fabricators can refer to it by its\n    gauge.\n  <\/p>\n\n  <div class=\"wf-answer-box\">\n\n    <strong>The basic relationship is:<\/strong>\n\n    <p>\n      <strong>Lower gauge number = thicker sheet metal<\/strong>\n    <\/p>\n\n    <p>\n      <strong>Higher gauge number = thinner sheet metal<\/strong>\n    <\/p>\n\n  <\/div>\n\n  <p>\n    For example, 16-gauge material is thicker than 18-gauge material, while\n    22-gauge material is thinner than 20-gauge material.\n  <\/p>\n\n  <p>\n    Gauge numbers are commonly used when purchasing sheet metal, identifying\n    existing material, selecting fabrication tools, and communicating material\n    requirements.\n  <\/p>\n\n  <p>\n    However, gauge is not a universal measurement. The thickness associated\n    with a particular gauge can differ depending on the material, which is why\n    a material-specific metal gauge thickness chart should be used when\n    accuracy is important.\n  <\/p>\n\n\n  <!-- =====================================================\n  HOW TO READ CHART\n  ====================================================== -->\n\n  <h2>How to Read a Sheet Metal Gauge Chart<\/h2>\n\n  <p>\n    A typical sheet metal gauge chart includes the gauge\n    number along with its approximate thickness in inches and millimeters.\n  <\/p>\n\n  <div class=\"wf-table-wrapper\">\n\n    <table class=\"wf-table\">\n\n      <thead>\n        <tr>\n          <th>Steel Gauge<\/th>\n          <th>Approx. Thickness (inches)<\/th>\n          <th>Approx. Thickness (mm)<\/th>\n        <\/tr>\n      <\/thead>\n\n      <tbody>\n\n        <tr>\n          <td>24<\/td>\n          <td>0.023&#8243;<\/td>\n          <td>0.58 mm<\/td>\n        <\/tr>\n\n        <tr>\n          <td>22<\/td>\n          <td>0.029&#8243;<\/td>\n          <td>0.73 mm<\/td>\n        <\/tr>\n\n        <tr>\n          <td>20<\/td>\n          <td>0.036&#8243;<\/td>\n          <td>0.91 mm<\/td>\n        <\/tr>\n\n        <tr>\n          <td>18<\/td>\n          <td>0.048&#8243;<\/td>\n          <td>1.22 mm<\/td>\n        <\/tr>\n\n        <tr>\n          <td>16<\/td>\n          <td>0.060&#8243;<\/td>\n          <td>1.52 mm<\/td>\n        <\/tr>\n\n        <tr>\n          <td>14<\/td>\n          <td>0.075&#8243;<\/td>\n          <td>1.90 mm<\/td>\n        <\/tr>\n\n        <tr>\n          <td>12<\/td>\n          <td>0.105&#8243;<\/td>\n          <td>2.66 mm<\/td>\n        <\/tr>\n\n        <tr>\n          <td>10<\/td>\n          <td>0.135&#8243;<\/td>\n          <td>3.43 mm<\/td>\n        <\/tr>\n\n      <\/tbody>\n\n    <\/table>\n\n  <\/div>\n\n  <p>\n    These values are approximate and are provided as a general steel reference.\n    Always check the appropriate material-specific specification when exact\n    dimensions are required.\n  <\/p>\n\n  <p>\n    When reading the chart, start by identifying the gauge number. Then move\n    across the row to find the corresponding thickness in inches or\n    millimeters.\n  <\/p>\n\n  <p>\n    For example, if you&#8217;re working with 18-gauge steel, the\n    chart indicates an approximate thickness of\n    0.048 inches or 1.22 mm.\n  <\/p>\n\n\n\n  <!-- =====================================================\n  MATERIAL DIFFERENCES\n  ====================================================== -->\n\n  <h2>Why Does Gauge Thickness Vary by Material?<\/h2>\n\n  <p>\n    One of the most important points when using a sheet metal thickness chart\n    is that gauge numbers do not necessarily represent the same thickness\n    across different materials.\n  <\/p>\n\n  <p>\n    Steel, stainless steel, and aluminum can use different gauge-to-thickness\n    relationships. As a result, an 18-gauge aluminum sheet should not\n    automatically be assumed to have the exact same thickness as an 18-gauge\n    steel sheet.\n  <\/p>\n\n  <p>\n    This is why material identification should come before selecting a gauge\n    conversion.\n  <\/p>\n\n  <h3>When Selecting Sheet Metal, Consider:<\/h3>\n\n  <ul>\n    <li>Material type<\/li>\n    <li>Gauge<\/li>\n    <li>Actual thickness<\/li>\n    <li>Material grade, where applicable<\/li>\n    <li>Required strength and formability<\/li>\n    <li>Fabrication process<\/li>\n  <\/ul>\n\n  <p>\n    For precision work, drawings and material specifications should generally\n    state the required thickness rather than relying on gauge alone.\n  <\/p>\n\n\n  <!-- =====================================================\n  GAUGE VS THICKNESS\n  ====================================================== -->\n\n  <h2>Gauge vs. Actual Sheet Metal Thickness<\/h2>\n\n  <p>\n    Gauge and thickness are related, but they are not the same thing.\n  <\/p>\n\n  <p>\n    Gauge is a numbering system, while thickness is a physical measurement\n    expressed in units such as inches or millimeters.\n  <\/p>\n\n  <div class=\"wf-answer-box\">\n\n    <strong>Example:<\/strong>\n\n    <p>\n      <strong>18 gauge steel = 0.048 inch = 1.22 mm<\/strong>\n    <\/p>\n\n  <\/div>\n\n  <p>\n    The gauge gives you a convenient reference, while the thickness tells you\n    the actual dimension.\n  <\/p>\n\n  <p>\n    This distinction becomes particularly important when working with\n    fabrication equipment. Bending, cutting, forming, and welding processes\n    depend on the material&#8217;s actual thickness and properties.\n  <\/p>\n\n  <p>\n    If a project specification calls for a particular thickness, use the\n    specified measurement rather than assuming that a gauge number will always\n    provide an exact equivalent.\n  <\/p>\n\n\n  <!-- =====================================================\n  MEASURING THICKNESS\n  ====================================================== -->\n\n  <h2>How to Measure Sheet Metal Thickness<\/h2>\n\n  <p>\n    If you have an existing piece of sheet metal and don&#8217;t know its gauge,\n    measuring its thickness can help you determine the appropriate gauge range.\n  <\/p>\n\n  <p>\n    A sheet metal thickness gauge is designed specifically for this type of\n    measurement. These tools typically have openings or measurement points\n    corresponding to different gauge numbers and thicknesses.\n  <\/p>\n\n  <h3>How to Measure Sheet Metal<\/h3>\n\n  <ol>\n\n    <li>\n      Clean the area being measured.\n    <\/li>\n\n    <li>\n      Place the sheet metal thickness gauge against the material.\n    <\/li>\n\n    <li>\n      Ensure the material is properly positioned in the gauge.\n    <\/li>\n\n    <li>\n      Identify the point where the material fits correctly.\n    <\/li>\n\n    <li>\n      Read the corresponding gauge and thickness.\n    <\/li>\n\n    <li>\n      Compare the measurement with the appropriate material chart.\n    <\/li>\n\n  <\/ol>\n\n  <p>\n    Woodward Fab offers a\n    <a href=\"https:\/\/www.woodwardfab.com\/?s=sheet+metal+thickness+gauge\">\n      sheet metal thickness gauge\n    <\/a>\n    designed to help identify sheet metal thickness and gauge, making it useful\n    when working with existing or unidentified material.\n  <\/p>\n\n  <p>\n    For critical applications, a precision measuring instrument such as a\n    micrometer or caliper may also be used to determine the actual thickness.\n  <\/p>\n\n\n  <!-- =====================================================\n  FABRICATION IMPACT\n  ====================================================== -->\n\n  <h2>Why Sheet Metal Thickness Matters in Fabrication<\/h2>\n\n  <p>\n    The thickness of sheet metal affects how the material behaves during\n    fabrication and how the finished component performs.\n  <\/p>\n\n\n  <h3>Cutting<\/h3>\n\n  <p>\n    Thicker materials generally require equipment with greater cutting\n    capacity. Before cutting, verify that your shear, cutter, or other\n    equipment is suitable for the selected material and thickness.\n  <\/p>\n\n\n  <h3>Bending<\/h3>\n\n  <p>\n    Sheet thickness affects the force required to bend metal and can influence\n    the bend radius and finished dimensions. Your\n    <a href=\"https:\/\/www.woodwardfab.com\/product-category\/product\/sheet-metal-bending\/\">\n      sheet metal brake or bending equipment\n    <\/a>\n    should be appropriate for the material and thickness.\n  <\/p>\n\n\n  <h3>Welding<\/h3>\n\n  <p>\n    Thin sheet metal can be more susceptible to burn-through and heat\n    distortion. Welding settings and techniques may need to be adjusted\n    according to the material and thickness.\n  <\/p>\n\n\n  <h3>Forming<\/h3>\n\n  <p>\n    Thickness also influences how easily sheet metal can be shaped. The\n    material&#8217;s thickness, strength, and ductility all play a role in forming\n    operations.\n  <\/p>\n\n  <p>\n    Choosing the appropriate thickness therefore involves more than simply\n    selecting a gauge number. The intended application and fabrication process\n    should also be considered.\n  <\/p>\n\n\n  <!-- =====================================================\n  INTERNAL LINK\n  ====================================================== -->\n\n  <div class=\"wf-related\">\n\n    <h3>Related Sheet Metal Fabrication Resources<\/h3>\n\n    <ul>\n\n      <li>\n        <a href=\"https:\/\/www.woodwardfab.com\/product-category\/product\/sheet-metal-bending\/\">\n          Sheet Metal Bending Equipment\n        <\/a>\n      <\/li>\n\n      <li>\n        <a href=\"https:\/\/www.woodwardfab.com\/product-category\/product\/sheet-metal-bending\/3-in-1-machine\/\">\n          3-in-1 Sheet Metal Machines\n        <\/a>\n      <\/li>\n\n      <li>\n        <a href=\"https:\/\/www.woodwardfab.com\/blog\/what-are-the-manufacturing-processes-used-in-sheet-metal\/\">\n          Sheet Metal Manufacturing Processes\n        <\/a>\n      <\/li>\n\n      <li>\n        <a href=\"https:\/\/www.woodwardfab.com\/blog\/5-reasons-use-woodward-fabs-press-brakes\/\">\n          Why Use a Sheet Metal Press Brake?\n        <\/a>\n      <\/li>\n\n    <\/ul>\n\n  <\/div>\n\n\n  <!-- =====================================================\n  CHOOSING GAUGE\n  ====================================================== -->\n\n  <h2>How to Choose the Right Sheet Metal Gauge<\/h2>\n\n  <p>\n    There isn&#8217;t one sheet metal gauge that works for every project. The\n    appropriate thickness depends on what you&#8217;re making and how the material\n    will be fabricated.\n  <\/p>\n\n\n  <h3>1. Consider the Application<\/h3>\n\n  <p>\n    Start by determining how the finished component will be used. Decorative\n    panels, brackets, body panels, enclosures, and structural components may\n    require different thicknesses.\n  <\/p>\n\n\n  <h3>2. Consider Strength Requirements<\/h3>\n\n  <p>\n    If the component needs greater rigidity or resistance to deformation, a\n    thicker material may be appropriate. Lightweight applications may require\n    thinner sheet metal.\n  <\/p>\n\n\n  <h3>3. Consider Formability<\/h3>\n\n  <p>\n    If the material needs to be bent, rolled, or shaped, make sure the selected\n    thickness and material are suitable for the forming process.\n  <\/p>\n\n\n  <h3>4. Check Your Equipment<\/h3>\n\n  <p>\n    Your fabrication equipment has specific capacity limits. Confirm that the\n    selected gauge and material can be safely processed using your tools.\n  <\/p>\n\n\n  <h3>5. Verify the Material<\/h3>\n\n  <p>\n    Always identify whether you&#8217;re working with steel, stainless steel,\n    aluminum, or another material before using a gauge conversion chart.\n  <\/p>\n\n\n  <!-- =====================================================\n  COMMON MISTAKES\n  ====================================================== -->\n\n  <h2>Common Mistakes When Using a Gauge Chart<\/h2>\n\n  <p>\n    A few simple mistakes can lead to incorrect material selection.\n  <\/p>\n\n  <div class=\"wf-process-box\">\n\n    <p>\n      <strong>Assuming a higher gauge means thicker metal:<\/strong>\n      Remember that, generally, a higher gauge number indicates thinner sheet\n      metal.\n    <\/p>\n\n    <p>\n      <strong>Using one chart for every material:<\/strong>\n      Gauge-to-thickness conversions can vary by material, so use the correct\n      chart.\n    <\/p>\n\n    <p>\n      <strong>Choosing material based only on gauge:<\/strong>\n      Consider strength, application, formability, and fabrication requirements\n      as well.\n    <\/p>\n\n    <p>\n      <strong>Ignoring actual thickness:<\/strong>\n      For precision work, verify the required thickness in inches or\n      millimeters.\n    <\/p>\n\n  <\/div>\n\n\n  <!-- =====================================================\n  FINAL THOUGHTS\n  ====================================================== -->\n\n  <h2>Final Thoughts<\/h2>\n\n  <p>\n    Learning how to use a sheet metal gauge chart makes it\n    easier to understand sheet metal specifications and select appropriate\n    materials for fabrication projects. The basic rule is simple: lower gauge\n    numbers generally indicate thicker material, while higher gauge numbers\n    indicate thinner material.\n  <\/p>\n\n  <p>\n    However, gauge should always be considered alongside the type of material\n    being used. Steel, aluminum, stainless steel, and other metals can have\n    different gauge-to-thickness relationships.\n  <\/p>\n\n  <p>\n    When accuracy matters, verify the actual thickness using a suitable\n    measuring tool and consult the appropriate material specification. With a\n    clear understanding of gauge, thickness, and material, fabricators can make\n    more informed decisions when cutting, bending, forming, and working with\n    sheet metal.\n  <\/p>\n\n\n  <!-- =====================================================\n  FAQ\n  ====================================================== -->\n\n  <h2>Frequently Asked Questions<\/h2>\n\n  <div class=\"wf-faq\">\n\n    <div class=\"wf-faq-item\">\n\n      <div class=\"wf-faq-question\">\n        Is 18 gauge thicker than 20 gauge?\n      <\/div>\n\n      <p>\n        Yes. For the same material reference, 18-gauge sheet metal is thicker\n        than 20-gauge sheet metal.\n      <\/p>\n\n    <\/div>\n\n\n    <div class=\"wf-faq-item\">\n\n      <div class=\"wf-faq-question\">\n        How do I convert sheet metal gauge to thickness?\n      <\/div>\n\n      <p>\n        Use a gauge-to-thickness chart specific to the material you&#8217;re working\n        with. The chart will typically provide the approximate thickness in\n        inches and millimeters.\n      <\/p>\n\n    <\/div>\n\n\n    <div class=\"wf-faq-item\">\n\n      <div class=\"wf-faq-question\">\n        Does sheet metal gauge vary by material?\n      <\/div>\n\n      <p>\n        Yes. The thickness associated with a particular gauge can vary between\n        materials, so always use the appropriate material-specific gauge chart.\n      <\/p>\n\n    <\/div>\n\n\n    <div class=\"wf-faq-item\">\n\n      <div class=\"wf-faq-question\">\n        How can I find the gauge of existing sheet metal?\n      <\/div>\n\n      <p>\n        You can use a sheet metal thickness gauge to identify the approximate\n        gauge and thickness of an existing piece of sheet metal. For more\n        precise measurements, a caliper or micrometer can be used.\n      <\/p>\n\n    <\/div>\n\n  <\/div>\n\n\n  <!-- =====================================================\n  CTA\n  ====================================================== -->\n\n  <div class=\"wf-cta\">\n\n    <h2>Need the Right Equipment for Sheet Metal Fabrication?<\/h2>\n\n    <p>\n      Explore Woodward Fab&#8217;s range of sheet metal fabrication equipment for\n      cutting, bending, forming, and shaping metal.\n    <\/p>\n\n    <a href=\"https:\/\/www.woodwardfab.com\/product-category\/product\/sheet-metal-bending\/\">\n      Explore Sheet Metal Equipment\n    <\/a>\n\n  <\/div>\n\n<\/article>\n\n\n<!-- =========================================================\nFAQ SCHEMA\n========================================================= -->\n\n<script type=\"application\/ld+json\">\n{\n  \"@context\": \"https:\/\/schema.org\",\n  \"@type\": \"FAQPage\",\n  \"mainEntity\": [\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Is 18 gauge thicker than 20 gauge?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Yes. For the same material reference, 18-gauge sheet metal is thicker than 20-gauge sheet metal.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"How do I convert sheet metal gauge to thickness?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Use a gauge-to-thickness chart specific to the material you're working with. The chart will typically provide the approximate thickness in inches and millimeters.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Does sheet metal gauge vary by material?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Yes. The thickness associated with a particular gauge can vary between materials, so always use the appropriate material-specific gauge chart.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"How can I find the gauge of existing sheet metal?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"You can use a sheet metal thickness gauge to identify the approximate gauge and thickness of an existing piece of sheet metal. For more precise measurements, a caliper or micrometer can be used.\"\n      }\n    }\n  ]\n}\n<\/script>\n\n\n\n<p><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Understanding sheet metal thickness is essential when selecting material for fabrication, repair, bending, cutting, or forming. A sheet metal gauge chart provides a convenient way to understand the relationship between a metal&#8217;s gauge number and its actual thickness. However, gauge numbers can be confusing because a lower gauge number generally means thicker metal, while a higher gauge number means thinner metal. For example, 18-gauge steel is thicker than 20-gauge steel. The actual thickness represented by each gauge can also vary depending on the type of metal. Understanding these differences helps fabricators choose the appropriate material and avoid errors during fabrication. In this guide, we&#8217;ll explain how to read a sheet&hellip; <a class=\"read-more\" href=\"https:\/\/www.woodwardfab.com\/blog\/sheet-metal-guage-chart\/\">Read More<\/a><\/p>\n","protected":false},"author":2,"featured_media":34772,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[30,28,32,17],"tags":[],"class_list":["post-34767","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-pipe-and-tube-fabrication","category-sheet-metal-bending","category-sheet-metal-fabrication","category-sheet-metalworking"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.6 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Sheet Metal Gauge Chart: How to Read Gauge &amp; Thickness<\/title>\n<meta name=\"description\" content=\"Learn how to read a sheet metal gauge chart, understand gauge-to-thickness conversion, and choose the right sheet metal thickness for fabrication projects.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.woodwardfab.com\/blog\/sheet-metal-guage-chart\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Sheet Metal Gauge Chart: How to Read Gauge &amp; Thickness\" \/>\n<meta property=\"og:description\" content=\"Learn how to read a sheet metal gauge chart, understand gauge-to-thickness conversion, and choose the right sheet metal thickness for fabrication projects.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.woodwardfab.com\/blog\/sheet-metal-guage-chart\/\" \/>\n<meta property=\"og:site_name\" content=\"Woodwardfab Blog\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/WoodwardFab\/\" \/>\n<meta property=\"article:published_time\" content=\"2026-09-21T06:56:46+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2026-09-29T07:45:54+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.woodwardfab.com\/blog\/wp-content\/uploads\/2026\/09\/Sheet-Metal-Gauge-Chart.webp\" \/>\n\t<meta property=\"og:image:width\" content=\"1672\" \/>\n\t<meta property=\"og:image:height\" content=\"941\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/webp\" \/>\n<meta name=\"author\" content=\"Darren O&#039;Brien\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@woodwardfab\" \/>\n<meta name=\"twitter:site\" content=\"@woodwardfab\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Darren O&#039;Brien\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"7 minutes\" \/>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"Sheet Metal Gauge Chart: How to Read Gauge & Thickness","description":"Learn how to read a sheet metal gauge chart, understand gauge-to-thickness conversion, and choose the right sheet metal thickness for fabrication projects.","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/www.woodwardfab.com\/blog\/sheet-metal-guage-chart\/","og_locale":"en_US","og_type":"article","og_title":"Sheet Metal Gauge Chart: How to Read Gauge & Thickness","og_description":"Learn how to read a sheet metal gauge chart, understand gauge-to-thickness conversion, and choose the right sheet metal thickness for fabrication projects.","og_url":"https:\/\/www.woodwardfab.com\/blog\/sheet-metal-guage-chart\/","og_site_name":"Woodwardfab Blog","article_publisher":"https:\/\/www.facebook.com\/WoodwardFab\/","article_published_time":"2026-09-21T06:56:46+00:00","article_modified_time":"2026-09-29T07:45:54+00:00","og_image":[{"width":1672,"height":941,"url":"https:\/\/www.woodwardfab.com\/blog\/wp-content\/uploads\/2026\/09\/Sheet-Metal-Gauge-Chart.webp","type":"image\/webp"}],"author":"Darren O'Brien","twitter_card":"summary_large_image","twitter_creator":"@woodwardfab","twitter_site":"@woodwardfab","twitter_misc":{"Written by":"Darren O'Brien","Est. reading time":"7 minutes"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"Article","@id":"https:\/\/www.woodwardfab.com\/blog\/sheet-metal-guage-chart\/#article","isPartOf":{"@id":"https:\/\/www.woodwardfab.com\/blog\/sheet-metal-guage-chart\/"},"author":{"name":"Darren O'Brien","@id":"https:\/\/www.woodwardfab.com\/blog\/#\/schema\/person\/302b8819c12c9145bfdc6336074f0399"},"headline":"How to Read a Sheet Metal Gauge Chart: Gauge, Thickness &amp; Material Explained","datePublished":"2026-09-21T06:56:46+00:00","dateModified":"2026-09-29T07:45:54+00:00","mainEntityOfPage":{"@id":"https:\/\/www.woodwardfab.com\/blog\/sheet-metal-guage-chart\/"},"wordCount":1466,"publisher":{"@id":"https:\/\/www.woodwardfab.com\/blog\/#organization"},"image":{"@id":"https:\/\/www.woodwardfab.com\/blog\/sheet-metal-guage-chart\/#primaryimage"},"thumbnailUrl":"https:\/\/www.woodwardfab.com\/blog\/wp-content\/uploads\/2026\/09\/Sheet-Metal-Gauge-Chart.webp","articleSection":["Pipe and Tube Fabrication","Sheet Metal Bending","Sheet Metal Fabrication","Sheet Metalworking"],"inLanguage":"en-US"},{"@type":"WebPage","@id":"https:\/\/www.woodwardfab.com\/blog\/sheet-metal-guage-chart\/","url":"https:\/\/www.woodwardfab.com\/blog\/sheet-metal-guage-chart\/","name":"Sheet Metal Gauge Chart: How to Read Gauge & Thickness","isPartOf":{"@id":"https:\/\/www.woodwardfab.com\/blog\/#website"},"primaryImageOfPage":{"@id":"https:\/\/www.woodwardfab.com\/blog\/sheet-metal-guage-chart\/#primaryimage"},"image":{"@id":"https:\/\/www.woodwardfab.com\/blog\/sheet-metal-guage-chart\/#primaryimage"},"thumbnailUrl":"https:\/\/www.woodwardfab.com\/blog\/wp-content\/uploads\/2026\/09\/Sheet-Metal-Gauge-Chart.webp","datePublished":"2026-09-21T06:56:46+00:00","dateModified":"2026-09-29T07:45:54+00:00","description":"Learn how to read a sheet metal gauge chart, understand gauge-to-thickness conversion, and choose the right sheet metal thickness for fabrication projects.","breadcrumb":{"@id":"https:\/\/www.woodwardfab.com\/blog\/sheet-metal-guage-chart\/#breadcrumb"},"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/www.woodwardfab.com\/blog\/sheet-metal-guage-chart\/"]}]},{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/www.woodwardfab.com\/blog\/sheet-metal-guage-chart\/#primaryimage","url":"https:\/\/www.woodwardfab.com\/blog\/wp-content\/uploads\/2026\/09\/Sheet-Metal-Gauge-Chart.webp","contentUrl":"https:\/\/www.woodwardfab.com\/blog\/wp-content\/uploads\/2026\/09\/Sheet-Metal-Gauge-Chart.webp","width":1672,"height":941,"caption":"Sheet Metal Gauge Chart"},{"@type":"BreadcrumbList","@id":"https:\/\/www.woodwardfab.com\/blog\/sheet-metal-guage-chart\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/www.woodwardfab.com\/blog\/"},{"@type":"ListItem","position":2,"name":"How to Read a Sheet Metal Gauge Chart: Gauge, Thickness &amp; Material Explained"}]},{"@type":"WebSite","@id":"https:\/\/www.woodwardfab.com\/blog\/#website","url":"https:\/\/www.woodwardfab.com\/blog\/","name":"Woodward Fab Blog","description":"Manufacturer of Metal Working Machinery","publisher":{"@id":"https:\/\/www.woodwardfab.com\/blog\/#organization"},"potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/www.woodwardfab.com\/blog\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"en-US"},{"@type":"Organization","@id":"https:\/\/www.woodwardfab.com\/blog\/#organization","name":"Woodward Fab","url":"https:\/\/www.woodwardfab.com\/blog\/","logo":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/www.woodwardfab.com\/blog\/#\/schema\/logo\/image\/","url":"https:\/\/www.woodwardfab.com\/blog\/wp-content\/uploads\/2017\/08\/Logo-144.png","contentUrl":"https:\/\/www.woodwardfab.com\/blog\/wp-content\/uploads\/2017\/08\/Logo-144.png","width":144,"height":144,"caption":"Woodward Fab"},"image":{"@id":"https:\/\/www.woodwardfab.com\/blog\/#\/schema\/logo\/image\/"},"sameAs":["https:\/\/www.facebook.com\/WoodwardFab\/","https:\/\/x.com\/woodwardfab","https:\/\/instagram.com\/woodward_fab","https:\/\/www.pinterest.com\/woodwardfab\/","https:\/\/www.youtube.com\/user\/woodwardfab"]},{"@type":"Person","@id":"https:\/\/www.woodwardfab.com\/blog\/#\/schema\/person\/302b8819c12c9145bfdc6336074f0399","name":"Darren O'Brien","image":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/www.woodwardfab.com\/blog\/#\/schema\/person\/image\/","url":"https:\/\/secure.gravatar.com\/avatar\/9d3ce00b71ccf89f4bd7ce1f38420eb5ae98155ea144cc0bbe306935b2605ec2?s=96&d=mm&r=g","contentUrl":"https:\/\/secure.gravatar.com\/avatar\/9d3ce00b71ccf89f4bd7ce1f38420eb5ae98155ea144cc0bbe306935b2605ec2?s=96&d=mm&r=g","caption":"Darren O'Brien"},"description":"Darren O\u2019Brien is the Manager at Woodward Fab, with a deep passion for sheet metal fabrication. He brings valuable expertise in tools, techniques, and industry trends, sharing insights that educate and inspire. Whether you're a seasoned fabricator or just starting out, Darren's knowledge is here to help you sharpen your skills and elevate your craft.","sameAs":["https:\/\/www.woodwardfab.com\/blog\/","https:\/\/www.linkedin.com\/in\/darren-o-brien-87436a88\/"],"url":"https:\/\/www.woodwardfab.com\/blog\/author\/darren-obrien\/"}]}},"_links":{"self":[{"href":"https:\/\/www.woodwardfab.com\/blog\/wp-json\/wp\/v2\/posts\/34767","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.woodwardfab.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.woodwardfab.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.woodwardfab.com\/blog\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.woodwardfab.com\/blog\/wp-json\/wp\/v2\/comments?post=34767"}],"version-history":[{"count":1,"href":"https:\/\/www.woodwardfab.com\/blog\/wp-json\/wp\/v2\/posts\/34767\/revisions"}],"predecessor-version":[{"id":34768,"href":"https:\/\/www.woodwardfab.com\/blog\/wp-json\/wp\/v2\/posts\/34767\/revisions\/34768"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.woodwardfab.com\/blog\/wp-json\/wp\/v2\/media\/34772"}],"wp:attachment":[{"href":"https:\/\/www.woodwardfab.com\/blog\/wp-json\/wp\/v2\/media?parent=34767"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.woodwardfab.com\/blog\/wp-json\/wp\/v2\/categories?post=34767"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.woodwardfab.com\/blog\/wp-json\/wp\/v2\/tags?post=34767"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}