GI Sheet Gauge to mm Conversion table
Quick answer: GI (galvanised) sheet gauge to mm: 14 ga = 1.99 mm, 16 ga = 1.61 mm, 18 ga = 1.31 mm, 20 ga = 1.01 mm, 22 ga = 0.85 mm, 24 ga = 0.70 mm, 26 ga = 0.55 mm. A 1,220 × 2,440 mm sheet weighs about 23.4 kg per mm, so a 20 ga sheet weighs about 23.5 kg.
| SL | Metal Name | Gauge Number | Galvanized Steel (mm) | Standard Size | weight |
| 1 | Gi Sheet | 9 | 3.891 | 1220×2440 | 90.85 |
| 2 | Gi Sheet | 10 | 3.51 | 1220×2440 | 81.96 |
| 3 | Gi Sheet | 11 | 3.132 | 1220×2440 | 73.13 |
| 4 | Gi Sheet | 12 | 2.753 | 1220×2440 | 64.28 |
| 5 | Gi Sheet | 13 | 2.372 | 1220×2440 | 55.39 |
| 6 | Gi Sheet | 14 | 1.994 | 1220×2440 | 46.56 |
| 7 | Gi Sheet | 15 | 1.803 | 1220×2440 | 42.10 |
| 8 | Gi Sheet | 16 | 1.613 | 1220×2440 | 37.66 |
| 9 | Gi Sheet | 17 | 1.461 | 1220×2440 | 34.11 |
| 10 | Gi Sheet | 18 | 1.311 | 1220×2440 | 30.61 |
| 11 | Gi Sheet | 19 | 1.158 | 1220×2440 | 27.04 |
| 12 | Gi Sheet | 20 | 1.006 | 1220×2440 | 23.49 |
| 13 | Gi Sheet | 21 | 0.93 | 1220×2440 | 21.72 |
| 14 | Gi Sheet | 22 | 0.853 | 1220×2440 | 19.92 |
| 15 | Gi Sheet | 23 | 0.777 | 1220×2440 | 18.14 |
| 16 | Gi Sheet | 24 | 0.701 | 1220×2440 | 16.37 |
| 17 | Gi Sheet | 25 | 0.627 | 1220×2440 | 14.64 |
| 18 | Gi Sheet | 26 | 0.551 | 1220×2440 | 12.87 |
| 19 | Gi Sheet | 27 | 0.513 | 1220×2440 | 11.98 |
| 20 | Gi Sheet | 28 | 0.475 | 1220×2440 | 11.09 |
| 21 | Gi Sheet | 29 | 0.437 | 1220×2440 | 10.20 |
| 22 | Gi Sheet | 30 | 0.399 | 1220×2440 | 9.32 |
| 23 | Gi Sheet | 31 | 0.361 | 1220×2440 | 8.43 |
| 24 | Gi Sheet | 32 | 0.34 | 1220×2440 | 7.94 |
We supply GI sheet from stock in Dubai Industrial City. See sizes and weight charts for GI sheet or get a quote on WhatsApp (058 566 7721).
Aluminum Gauge Table Brass Gauge Table Copper Gauge table Galvanized Steel Gauge Table
Standard Steel sheet gauge to mm Mild Steel Gauge Table
Download PDF:Download GI Sheet Gauge to mm Conversion Table (PDF)How to calculate GI sheet weight
Weight (kg) = length (m) × width (m) × thickness (mm) × 7.85. A 4 × 8 ft sheet (1.22 × 2.44 m = 2.977 m²) weighs 23.37 kg per mm.
- 26 ga (0.55 mm): about 12.9 kg
- 24 ga (0.70 mm): about 16.4 kg
- 22 ga (0.85 mm): about 19.9 kg
- 18 ga (1.31 mm): about 30.6 kg
The zinc coating (for example Z120 or Z275) adds a small amount of weight.
Need sheet, plate or sections in the UAE? WhatsApp 058 566 7721 for stock and price, or use the steel weight and cost estimator.
Frequently asked questions
What is 22 gauge GI sheet in mm?
About 0.85 mm (0.0336 in).
What is the weight of a 4×8 GI sheet?
About 23.4 kg per mm of thickness; an 0.5 mm sheet weighs about 11.7 kg.
Which GI gauge is used for ducting?
Typically 24–26 gauge for small ducts and 18–22 gauge for large ducts.
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