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SHEET METAL GAUGE CHART

Sheet Metal Gauge Chart

Compare mild steel, stainless steel, aluminum and galvanized steel gauges in inches and millimeters. Choose a gauge, find the nearest match to a measured thickness, or jump to a full material chart.

GAUGE TO THICKNESS

Same gauge. Different thickness.

Mild steel 1.5189 mm0.0598 in
Stainless steel 1.5875 mm0.0625 in
Aluminum 1.2908 mm0.05082 in
Galvanized steel 1.6129 mm0.0635 in

Nominal thickness only. A missing entry is not filled from another material.

WORK BACK FROM THICKNESS

Find the nearest gauge.

Use a decimal point or comma; do not use thousands separators.

Nearest listed nominal gauge · Mild steel16ga

1.5189 mm nominal
Your thickness − nominal: -0.0189 mm

A gauge is a table entry, not a universal formula. No values are interpolated. Use measured thickness when calculating a bend.

INCHES & MILLIMETERS

Full sheet metal gauge charts

Select a row to compare that gauge and use its nominal thickness in the reverse lookup.

Mild steel gauge chart

Mild steel · US supplier referenceNominal thickness · source inch values retained
GaugeInchesMillimeters
0.17934.5542
0.16444.1758
0.14953.7973
0.13453.4163
0.11963.0378
0.10462.6568
0.07471.8974
0.05981.5189
0.04781.2141
0.03590.9119
0.02990.7595
0.02390.6071
0.01790.4547
0.01490.3785

Metal Supermarkets ↗ · Data checked September 5, 2026

Stainless steel gauge chart

Stainless steel · US supplier referenceNominal thickness · source inch values retained
GaugeInchesMillimeters
0.171874.3655
0.156253.9688
0.140623.5717
0.1253.1750
0.109372.7780
0.078121.9842
0.06251.5875
0.0501.2700
0.03750.9525
0.031250.7938
0.0250.6350
0.018750.4762
0.015620.3967
0.01250.3175

Metal Supermarkets ↗ · Data checked September 5, 2026

Aluminum gauge chart

Aluminum · US supplier referenceNominal thickness · source inch values retained
GaugeInchesMillimeters
0.14433.6652
0.12853.2639
0.11442.9058
0.10192.5883
0.090742.3048
0.080812.0526
0.064081.6276
0.050821.2908
0.040301.0236
0.031960.8118
0.025350.6439
0.020100.5105
0.015940.4049
0.012640.3211
0.010030.2548

Metal Supermarkets ↗ · Data checked September 5, 2026

Galvanized steel gauge chart

Galvanized steel · US supplier referenceNominal thickness · source inch values retained
GaugeInchesMillimeters
0.16814.2697
0.15323.8913
0.13823.5103
0.12333.1318
0.10842.7534
0.07851.9939
0.06351.6129
0.05161.3106
0.03961.0058
0.03360.8534
0.02760.7010
0.02170.5512
0.01870.4750
0.01570.3988

Metal Supermarkets ↗ · Data checked September 5, 2026

Millimeters calculated from source inches × 25.4. Nominal does not mean measured.
Reference: https://www.metalsupermarkets.com/sheet-metal-gauge-chart/

READ THE TABLE IN CONTEXT

Nominal does not mean measured.

These are the listed sheet-gauge entries in the selected US supplier reference. A missing gauge number is not interpolated or filled from another material. The table is not a certificate of your sheet’s actual thickness.

Inches retain the selected source’s decimal values. Millimeters are calculated from those inches using 1 in = 25.4 mm, so they can differ from a supplier’s shortened metric display. For galvanized sheet, confirm the supplier’s coating and thickness specification.

Calculate a bend with your measured thickness →

Reference: Metal Supermarkets. Overlapping steel, aluminum and stainless entries were compared with UniPunch; differences in displayed decimal precision are recorded in our methodology.