MS flat weight calculator and weight chart per metre.
MS flat weight (kg/m) = width (mm) × thickness (mm) × 0.00785. A 50 × 6 mm MS flat weighs 2.36 kg/m, and a 6 m length weighs 14.1 kg. For SS flats use 0.00793.
Material detailsDensity: 7.85 g/cm³
Estimate costOptional rate per kg
Theoretical weight from nominal size and density. Actual weight varies within mill tolerances.
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MS flat weight chart (kg per metre)
Width down the side, thickness across the top. Mild steel 7.85 g/cm³.
| Width | 3 mm | 5 mm | 6 mm | 8 mm | 10 mm | 12 mm | 16 mm | 20 mm | 25 mm |
|---|---|---|---|---|---|---|---|---|---|
| 20 mm | 0.471 | 0.785 | 0.942 | 1.256 | 1.570 | 1.884 | 2.512 | – | – |
| 25 mm | 0.589 | 0.981 | 1.178 | 1.570 | 1.963 | 2.355 | 3.140 | 3.925 | – |
| 30 mm | 0.707 | 1.178 | 1.413 | 1.884 | 2.355 | 2.826 | 3.768 | 4.710 | 5.888 |
| 32 mm | 0.754 | 1.256 | 1.507 | 2.010 | 2.512 | 3.014 | 4.019 | 5.024 | 6.280 |
| 40 mm | 0.942 | 1.570 | 1.884 | 2.512 | 3.140 | 3.768 | 5.024 | 6.280 | 7.850 |
| 50 mm | 1.178 | 1.963 | 2.355 | 3.140 | 3.925 | 4.710 | 6.280 | 7.850 | 9.813 |
| 65 mm | 1.531 | 2.551 | 3.062 | 4.082 | 5.103 | 6.123 | 8.164 | 10.205 | 12.756 |
| 75 mm | 1.766 | 2.944 | 3.533 | 4.710 | 5.888 | 7.065 | 9.420 | 11.775 | 14.719 |
| 100 mm | 2.355 | 3.925 | 4.710 | 6.280 | 7.850 | 9.420 | 12.560 | 15.700 | 19.625 |
| 125 mm | 2.944 | 4.906 | 5.888 | 7.850 | 9.813 | 11.775 | 15.700 | 19.625 | 24.531 |
| 150 mm | 3.533 | 5.888 | 7.065 | 9.420 | 11.775 | 14.130 | 18.840 | 23.550 | 29.438 |
Reference basis: Compiled by Steel Impex India. Check each table’s source, product form and delivery condition before use. Sources, calculation methods and corrections.
Frequently asked questions
What is the MS flat weight formula?
Weight per metre (kg) = width (mm) × thickness (mm) × 7.85 / 1000.
What is the weight of a 50 × 6 MS flat?
2.36 kg per metre, or 14.1 kg for a 6 m length.
What is the weight of a 25 × 3 MS flat?
0.59 kg per metre.
How much does a 50 × 6 mm MS flat weigh per 6 metre length?
At 7.85 g/cm³, the rectangular-section estimate is 2.355 kg/m, or 14.13 kg for 6 m. The estimate excludes edge details and manufacturing tolerances.