GALVANIZED STEEL · SHEET GAUGE
Galvanized Steel Gauge Chart
Nominal thickness of galvanized sheet steel from 8 to 30 gauge in inches and millimeters, with an approximate weight per square foot.
QUICK LOOKUP
How thick is 16 gauge?
- Inches
- 0.0635
- Millimeters
- 1.613
- lb/ft²
- 2.593
- kg/m²
- 12.66
FULL CHART
Galvanized Steel Gauge Chart
| Gauge | Inches | mm | lb/ft² | kg/m² |
|---|---|---|---|---|
| 8 ga | 0.1681 | 4.270 | 6.865 | 33.52 |
| 9 ga | 0.1532 | 3.891 | 6.256 | 30.55 |
| 10 ga | 0.1382 | 3.510 | 5.644 | 27.56 |
| 11 ga | 0.1233 | 3.132 | 5.035 | 24.58 |
| 12 ga | 0.1084 | 2.753 | 4.427 | 21.61 |
| 14 ga | 0.0785 | 1.994 | 3.206 | 15.65 |
| 16 ga | 0.0635 | 1.613 | 2.593 | 12.66 |
| 18 ga | 0.0516 | 1.311 | 2.107 | 10.29 |
| 20 ga | 0.0396 | 1.006 | 1.617 | 7.90 |
| 22 ga | 0.0336 | 0.853 | 1.372 | 6.70 |
| 24 ga | 0.0276 | 0.701 | 1.127 | 5.50 |
| 26 ga | 0.0217 | 0.551 | 0.886 | 4.33 |
| 28 ga | 0.0187 | 0.475 | 0.764 | 3.73 |
| 30 ga | 0.0157 | 0.399 | 0.641 | 3.13 |
Thickness: published US supplier values from Metal Supermarkets, inch values kept as listed. Millimeters = inches × 25.4. Weight is calculated from steel density, 7.85 g/cm³, applied to the full listed thickness; actual zinc coating weight varies by coating class.
READ THE CHART
Gauge is a table entry.
Galvanized sheet has its own gauge table, and each entry is thicker than bare mild steel of the same number because the listed value includes the zinc coating: 16 ga galvanized is listed at 0.0635 in against 0.0598 in for mild steel.
Coating classes such as G60 and G90 change the zinc weight, so confirm the supplier’s specification when thickness or weight matters. The weight column applies steel density to the full listed thickness and is an estimate, not a coating-specific value.
Need a different unit or material? Convert gauge to mm for every material or compare all four gauge charts side by side.
Common galvanized steel gauge thicknesses
How thick is 10 gauge galvanized steel?
10 gauge galvanized steel is listed at 0.1382 in (3.510 mm) nominal thickness, about 5.64 lb per square foot.
How thick is 12 gauge galvanized steel?
12 gauge galvanized steel is listed at 0.1084 in (2.753 mm) nominal thickness, about 4.43 lb per square foot.
How thick is 14 gauge galvanized steel?
14 gauge galvanized steel is listed at 0.0785 in (1.994 mm) nominal thickness, about 3.21 lb per square foot.
How thick is 16 gauge galvanized steel?
16 gauge galvanized steel is listed at 0.0635 in (1.613 mm) nominal thickness, about 2.59 lb per square foot.
How thick is 18 gauge galvanized steel?
18 gauge galvanized steel is listed at 0.0516 in (1.311 mm) nominal thickness, about 2.11 lb per square foot.
How thick is 20 gauge galvanized steel?
20 gauge galvanized steel is listed at 0.0396 in (1.006 mm) nominal thickness, about 1.62 lb per square foot.
How thick is 22 gauge galvanized steel?
22 gauge galvanized steel is listed at 0.0336 in (0.853 mm) nominal thickness, about 1.37 lb per square foot.
How thick is 24 gauge galvanized steel?
24 gauge galvanized steel is listed at 0.0276 in (0.701 mm) nominal thickness, about 1.13 lb per square foot.