Stainless Steel Plate Weight Calculator
Weight = length × width × thickness × density. Enter the plate size, pick a thickness or gauge and a grade, and get the weight in kg and lb, per plate and per batch. 304 stainless weighs 7.93 kg/m² per mm of thickness, or 41.3 lb/ft² per inch.
Use the Stainless Steel Plate Weight Calculator
Plate Dimensions
Formula Reference
Area = L × W (rectangle), πD²/4 (circle) or π(OD² − ID²)/4 (ring). Shortcut: kg/m² = thickness (mm) × density (g/cm³); lb/ft² = thickness (in) × 41.25 for 304. Need bars, tubes, beams or other metals? Use the metal weight calculator.
Enter plate dimensions on the left and click Calculate.
Stainless Steel Grade Densities
| Grade | Type | kg/m³ | lb/in³ | kg/m² per mm |
|---|---|---|---|---|
| 304 / 304L | Austenitic | 7930 | 0.286 | 7.93 |
| 316 / 316L | Austenitic (Mo) | 7980 | 0.288 | 7.98 |
| 321 | Ti-stabilized austenitic | 7900 | 0.285 | 7.90 |
| 310 / 310S | Heat-resisting austenitic | 7920 | 0.286 | 7.92 |
| 430 | Ferritic | 7700 | 0.278 | 7.70 |
| 409 | Ferritic | 7750 | 0.280 | 7.75 |
| 410 | Martensitic | 7650 | 0.276 | 7.65 |
| 420 | Martensitic | 7750 | 0.280 | 7.75 |
| 17-4 PH | Precipitation hardening | 7780 | 0.281 | 7.78 |
| 2205 | Duplex | 7805 | 0.282 | 7.81 |
| 2507 | Super duplex | 7800 | 0.282 | 7.80 |
Nominal densities from producer data sheets and ASTM / EN 10088-1 values; individual heats vary by about ±1%.
Stainless sheet & plate weight per square foot
lb/ft² by gauge and fractional thickness; last column is a 4 × 8 ft sheet in 304.
| Size | in | 304 | 316 | 430 | 4×8 ft (304) |
|---|---|---|---|---|---|
| 10 ga | 0.1406 | 5.80 | 5.84 | 5.63 | 185.6 lb |
| 11 ga | 0.125 | 5.16 | 5.19 | 5.01 | 165.0 lb |
| 12 ga | 0.1094 | 4.51 | 4.54 | 4.38 | 144.4 lb |
| 14 ga | 0.0781 | 3.22 | 3.24 | 3.13 | 103.1 lb |
| 16 ga | 0.0625 | 2.58 | 2.59 | 2.50 | 82.5 lb |
| 18 ga | 0.05 | 2.06 | 2.08 | 2.00 | 66.0 lb |
| 20 ga | 0.0375 | 1.55 | 1.56 | 1.50 | 49.5 lb |
| 22 ga | 0.0313 | 1.29 | 1.30 | 1.25 | 41.3 lb |
| 24 ga | 0.025 | 1.03 | 1.04 | 1.00 | 33.0 lb |
| 26 ga | 0.0188 | 0.77 | 0.78 | 0.75 | 24.8 lb |
| 3/16" | 0.1875 | 7.74 | 7.78 | 7.51 | 247.5 lb |
| 1/4" | 0.25 | 10.31 | 10.38 | 10.01 | 330.0 lb |
| 5/16" | 0.3125 | 12.89 | 12.97 | 12.52 | 412.5 lb |
| 3/8" | 0.375 | 15.47 | 15.57 | 15.02 | 495.1 lb |
| 1/2" | 0.5 | 20.63 | 20.76 | 20.03 | 660.1 lb |
| 5/8" | 0.625 | 25.78 | 25.95 | 25.04 | 825.1 lb |
| 3/4" | 0.75 | 30.94 | 31.14 | 30.04 | 990.1 lb |
| 1" | 1 | 41.25 | 41.51 | 40.06 | 1,320.1 lb |
| 1-1/4" | 1.25 | 51.57 | 51.89 | 50.07 | 1,650.2 lb |
| 1-1/2" | 1.5 | 61.88 | 62.27 | 60.09 | 1,980.2 lb |
| 2" | 2 | 82.51 | 83.03 | 80.12 | 2,640.3 lb |
Stainless plate weight per square meter
kg/m² by thickness; last column is a 1000 × 2000 mm sheet in 304.
| mm | 304 | 316 | 430 | 1×2 m (304) |
|---|---|---|---|---|
| 0.5 | 3.97 | 3.99 | 3.85 | 7.9 kg |
| 0.8 | 6.34 | 6.38 | 6.16 | 12.7 kg |
| 1 | 7.93 | 7.98 | 7.70 | 15.9 kg |
| 1.2 | 9.52 | 9.58 | 9.24 | 19.0 kg |
| 1.5 | 11.90 | 11.97 | 11.55 | 23.8 kg |
| 2 | 15.86 | 15.96 | 15.40 | 31.7 kg |
| 2.5 | 19.83 | 19.95 | 19.25 | 39.7 kg |
| 3 | 23.79 | 23.94 | 23.10 | 47.6 kg |
| 4 | 31.72 | 31.92 | 30.80 | 63.4 kg |
| 5 | 39.65 | 39.90 | 38.50 | 79.3 kg |
| 6 | 47.58 | 47.88 | 46.20 | 95.2 kg |
| 8 | 63.44 | 63.84 | 61.60 | 126.9 kg |
| 10 | 79.30 | 79.80 | 77.00 | 158.6 kg |
| 12 | 95.16 | 95.76 | 92.40 | 190.3 kg |
| 15 | 118.95 | 119.70 | 115.50 | 237.9 kg |
| 20 | 158.60 | 159.60 | 154.00 | 317.2 kg |
| 25 | 198.25 | 199.50 | 192.50 | 396.5 kg |
| 30 | 237.90 | 239.40 | 231.00 | 475.8 kg |
| 40 | 317.20 | 319.20 | 308.00 | 634.4 kg |
| 50 | 396.50 | 399.00 | 385.00 | 793.0 kg |
Worked examples
- Metric plate. 304, 1,500 × 3,000 × 6 mm: 1.5 × 3 × 0.006 m = 0.027 m³ × 7,930 = 214.1 kg (472.0 lb).
- Imperial sheet. 316, 4 × 8 ft, 11 ga (0.125 in): 0.125 × 41.51 lb/ft² per inch = 5.19 lb/ft² × 32 ft² = 166.1 lb (75.3 kg).
- Disc. 304, 500 mm diameter × 10 mm: π × 0.5² ÷ 4 = 0.19635 m² × 0.01 × 7,930 = 15.57 kg.
- Grade difference. The same 1 × 2 m × 10 mm plate weighs 158.6 kg in 304, 159.6 kg in 316 and 154.0 kg in 430.
Summary
This calculator computes the weight of a stainless steel plate as area × thickness × density. Rectangular plates use length × width, circular plates π × D² ÷ 4 and rings π × (OD² − ID²) ÷ 4. Grade densities follow producer and ASTM/EN data: 7,930 kg/m³ for 304/304L, 7,980 for 316/316L and 7,700 for ferritic 430. Thickness can be typed in mm or inches or picked from stainless sheet gauges, fractional plate sizes and metric plate sizes. Results are theoretical weights from nominal dimensions; mill thickness tolerances can add a few percent. For bars, tubes, beams and other metals, use the metal weight calculator.
How it works
- Choose the shape: rectangle, circle (disc) or ring.
- Enter the length and width, or the diameter(s), in mm, cm, m, in or ft.
- Type the thickness, or pick a stainless sheet gauge, fractional plate size or metric thickness from the list.
- Select the grade; its density is applied automatically. Use Custom for any other alloy.
- Optionally set a quantity and a price per kg or lb to get the batch weight and material cost.
Use cases
- Estimating stainless plate weight for fabrication quotes and procurement.
- Converting a sheet gauge such as 16 ga or 11 ga into weight per square foot.
- Weighing laser-cut discs and flanges (circle and ring plates).
- Calculating freight and lifting loads for plate stock.
- Comparing 304, 316 and 430 sheet weights for the same panel.
- Pricing a cut-to-size order from a price per kg or per lb.