Stainless steel sheet weight is calculated as thickness x width x length x density. A density table by grade, kg/m² values by thickness, standard sizes and coil calculation explained with examples.
Sheet calculation is simpler than it looks, because the units cancel each other out. A sheet with an area of 1 m² and a thickness of 1 mm means a volume of 1000 cm³. When density is given in g/cm³, the mass of this volume comes out directly in kilograms. That is, if you take thickness in millimeters and dimensions in meters, the result of the multiplication is kilograms.
The formula is: Weight (kg) = thickness (mm) x width (m) x length (m) x density (g/cm³). If you prefer to use square meters instead of area, thickness x density gives you the kg value of 1 m² of sheet, and you multiply it by the area. This value is given in the table below by thickness.
Density is the only variable in the calculation, and it shows small but real differences by grade family. Among austenitic grades, the molybdenum-bearing 316 family is slightly denser, while ferritic grades are noticeably lighter. The values below are the room-temperature references in EN 10088-1.
| Grade | EN code | Density (g/cm³) | 1 mm, 1 m² sheet (kg) |
|---|---|---|---|
| 304 | 1.4301 | 7.90 | 7.90 |
| 304L | 1.4307 | 7.90 | 7.90 |
| 316 | 1.4401 | 8.00 | 8.00 |
| 316L | 1.4404 | 8.00 | 8.00 |
| 316Ti | 1.4571 | 8.00 | 8.00 |
| 321 | 1.4541 | 7.90 | 7.90 |
| 430 | 1.4016 | 7.70 | 7.70 |
| 409 | 1.4512 | 7.70 | 7.70 |
| 420 | 1.4021 | 7.70 | 7.70 |
First example: a 304 sheet, 2 mm thick, 1250 x 2500 mm. The area is 1.25 x 2.5 = 3.125 m². The weight comes to 2 x 3.125 x 7.90 = 49.4 kg.
Second example: a 316 sheet, 3 mm thick, 1500 x 3000 mm. The area is 4.5 m². The weight is 3 x 4.5 x 8.00 = 108.0 kg. In 304 at the same size and thickness it would be 106.7 kg, so the difference is around 1.3%.
Third example: a 430 sheet, 1.5 mm thick, 1000 x 2000 mm. The area is 2 m². The weight is 1.5 x 2 x 7.70 = 23.1 kg. That 430 comes out this light compared with austenitic grades shows that the density difference is not just a small detail; in an order of one ton of material, the number of sheets changes accordingly.
The table below gives theoretical values. The sheet weights are for 304; for 316, just use the kg/m² value in the table and multiply by the area. The weights are rounded values calculated from nominal thickness.
| Thickness (mm) | 304 kg/m² | 316 kg/m² | 304, 1250 x 2500 (kg) | 304, 1500 x 3000 (kg) |
|---|---|---|---|---|
| 0.5 | 3.95 | 4.00 | 12.3 | 17.8 |
| 0.8 | 6.32 | 6.40 | 19.8 | 28.4 |
| 1.0 | 7.90 | 8.00 | 24.7 | 35.6 |
| 1.5 | 11.85 | 12.00 | 37.0 | 53.3 |
| 2.0 | 15.80 | 16.00 | 49.4 | 71.1 |
| 3.0 | 23.70 | 24.00 | 74.1 | 106.7 |
| 4.0 | 31.60 | 32.00 | 98.8 | 142.2 |
| 5.0 | 39.50 | 40.00 | 123.4 | 177.8 |
| 6.0 | 47.40 | 48.00 | 148.1 | 213.3 |
| 8.0 | 63.20 | 64.00 | 197.5 | 284.4 |
| 10.0 | 79.00 | 80.00 | 246.9 | 355.5 |
| 12.0 | 94.80 | 96.00 | 296.3 | 426.6 |
| 15.0 | 118.50 | 120.00 | 370.3 | 533.2 |
| 20.0 | 158.00 | 160.00 | 493.8 | 711.0 |
The same logic applies when buying coil; you just convert between weight and length instead of length. Weight per meter = thickness (mm) x width (m) x density. For example, a 304 coil 1.0 mm thick and 1250 mm wide weighs 1 x 1.25 x 7.90 = 9.875 kg per meter. From a 5000 kg coil, this gives approximately 506 m of strip.
When calculating the number of sheets to be cut from a coil, the knife allowance, head and tail scrap and edge trim also come into play. Because these allowances vary by line and process type, they are settled in the quote process. You can find the processing logic behind choosing coil or sheet in the which form when article.
It is normal to see small differences between calculation and scale. The first is thickness tolerance: the thickness of sheet coming out of the rolling mill may be slightly below or above the nominal value, and the permitted limits are defined in tables in product standards such as EN ISO 9445. Second, packaging materials such as protective surface film, interleaving paper, pallets and straps are added to gross weight and are not included in net weight.
Third is rounding: using area and density values with different decimals can shift the result by small amounts. The invoice and delivery note weight is based on actual weighing, while the calculation is based on the theoretical value; the difference between the two should not be mistaken for an error at first glance.
When choosing a size, first think about how you will lay your part out on the sheet. Common market sizes are listed as 1000 x 2000, 1250 x 2500, 1500 x 3000 and 1220 x 2440 mm (4 x 8 ft). These ranges on the product pages are standard and industry references; current stock and special sizes are confirmed in the quote process.
Thickness selection starts from strength but does not end with handling and processing. Up to 3 mm, material is mostly called cold-rolled sheet, and above 3 mm hot-rolled plate; the product page makes the same distinction. The surface of thick plate differs from the smooth 2B surface of cold-rolled sheet.
Weight also affects practical decisions. A 304 plate of 3 mm thickness at 1500 x 3000 mm weighs about 107 kg; a plate of this weight generally requires lifting equipment. In thin and long sheets, waviness and flatness deviation are noticed more easily. So choosing the size that suits the part to be processed determines both scrap and ease of handling.
| Size (mm) | Area (m²) | Note |
|---|---|---|
| 1000 x 2000 | 2.000 | For small and medium-sized parts |
| 1220 x 2440 (4 x 8 ft) | 2.977 | For projects dimensioned in feet (4 x 8 ft) |
| 1250 x 2500 | 3.125 | Common size on the market |
| 1500 x 3000 | 4.500 | For large panels and long parts |
You do not have to do the calculations above by hand. The stainless steel weight calculator does this for you. Adding the result to your quote request, to clarify how many sheets or how many kilograms you want, speeds up the process.
Price varies by grade, size, quantity and market; reach us through the quote form. When choosing a product, you can also look at the thickness and size ranges on the stainless steel sheet and plate and coil pages. For telling grades apart, the 304 or 316 article is a guide.
Density values are taken from the EN 10088-1 standard (list of stainless steels). For dimensional and thickness tolerances, the EN ISO 9445 series (continuously cold-rolled stainless steel) and, for hot-rolled products, the EN ISO 9444 series are used; which tolerance applies depends on the product and the delivery condition. The weights in the tables are theoretical values; commercial weight is determined by weighing and the order document.
In kilograms with the formula thickness (mm) x width (m) x length (m) x density (g/cm³). For example, a 304 sheet 2 mm thick and 1250 x 2500 mm weighs 2 x 3.125 x 7.90 = 49.4 kg.
According to EN 10088-1, 7.90 for 304 and 8.00 g/cm³ for 316. For ferritic grades such as 430, use 7.70.
7.90 kg in 304, 8.00 kg in 316, 7.70 kg in 430. For other thicknesses, just multiply this value by the thickness.
Because of thickness tolerance, packaging and pallet weight, rounding and surface film. Theoretical weight is found from nominal thickness; real sheet may be slightly below or above this value.
Divide the coil weight (kg) by thickness (mm) x width (m) x density. For a 304 coil of 1.0 mm and 1250 mm width, this gives 9.875 kg per meter; 5000 kg is about 506 m.
The size that gives the least scrap is chosen according to how your part nests on the sheet. 1000 x 2000, 1250 x 2500, 1500 x 3000 and 1220 x 2440 mm are common sizes. For special sizes and stock, ask in the quote process.
A quote needs the grade, thickness, size and quantity or total kilograms. If you find the theoretical weight with the calculator and add it to your request, the quantity becomes clear and the quote process gets easier.
