Definitive answer for Indian fabricators, estimators and engineers: which density constant to use for IS 2062 E250 / E350 / E410 / E450 weight calculations, the correct sheet and plate weight formula, and a comparison with all common Indian engineering metals.
Calculate exact weight using the correct IS 2062 density — select shape, enter dimensions, get instant result
The universally used Indian fabrication formulas for MS weight calculation — derived from density = 7,850 kg/m³
| Thickness (mm) | SWG Gauge | kg / m² | kg / sheet (2500×1250) | kg / sheet (2438×1219) | kg / sheet (3000×1500) | Sheets / MT |
|---|---|---|---|---|---|---|
| 0.80 | 22 SWG | 6.28 | 19.6 | 18.6 | 28.3 | 51.0 |
| 1.00 | 20 SWG | 7.85 | 24.5 | 23.3 | 35.3 | 40.8 |
| 1.25 | 18 SWG | 9.81 | 30.7 | 29.1 | 44.1 | 32.6 |
| 1.60 | 16 SWG | 12.56 | 39.3 | 37.3 | 56.5 | 25.5 |
| 2.00 | 14 SWG | 15.70 | 49.1 | 46.6 | 70.7 | 20.4 |
| 2.50 | 12 SWG | 19.63 | 61.3 | 58.3 | 88.3 | 16.3 |
| 3.15 | 10 SWG | 24.73 | 77.3 | 73.4 | 111.3 | 12.9 |
| 4.00 | 8 SWG | 31.40 | 98.1 | 93.2 | 141.3 | 10.2 |
| 5.00 | 6 SWG | 39.25 | 122.7 | 116.5 | 176.6 | 8.2 |
| 6.00 | 4 SWG | 47.10 | 147.2 | 139.8 | 212.0 | 6.8 |
| 8.00 | — | 62.80 | 196.3 | 186.5 | 282.6 | 5.1 |
| 10.00 | — | 78.50 | 245.3 | 233.1 | 353.3 | 4.1 |
| 12.00 | — | 94.20 | 294.4 | 279.7 | 423.9 | 3.4 |
| 16.00 | — | 125.60 | 392.5 | 372.9 | 565.2 | 2.5 |
| 20.00 | — | 157.00 | 490.6 | 466.1 | 706.5 | 2.0 |
| 25.00 | — | 196.25 | 613.3 | 582.7 | 883.1 | 1.6 |
* kg/m² = Thickness (mm) × 7.85. Sheet sizes: 2500×1250 mm (3.125 m²), 2438×1219 mm (2.972 m²), 3000×1500 mm (4.5 m²). Sheets per MT = 1000 ÷ weight per sheet. All values based on IS 2062 density 7,850 kg/m³ and nominal thickness.
Grade differences in IS 2062:2011 affect mechanical strength only — density remains 7,850 kg/m³ across all grades
Why you must not use the IS 2062 MS constant (7.85) for other materials — density errors and their financial impact
Step-by-step calculations for the most common Indian fabrication weight estimation scenarios
L=2.5m, W=1.25m, T=6mm, Density=7.85
W = 2.5 × 1.25 × 6 × 7.85
= 2.5 × 1.25 = 3.125 m²
= 3.125 × 6 = 18.75
= 18.75 × 7.85 = 147.2 kg
At ₹75/kg (IS 2062 E250 HR MS, Apr 2026):
≈ ₹11,040 per sheet
L=3.0m, W=1.5m, T=12mm
W = 3.0 × 1.5 × 12 × 7.85
= 3.0 × 1.5 = 4.5 m²
= 4.5 × 12 = 54
= 54 × 7.85 = 423.9 kg
50 plates per order:
= 50 × 423.9 = 21,195 kg ≈ 21.2 MT
D=50mm, L=6m
W = D² × L × 0.006165
= 50² × 6 × 0.006165
= 2500 × 6 × 0.006165
= 15,000 × 0.006165
= 92.5 kg per bar
100 bars = 9,247 kg ≈ 9.25 MT
W=75mm, T=10mm, L=6m
W = 75 × 10 × 6 × 0.00785
= 75 × 10 = 750 mm²
= 750 × 6 = 4,500
= 4,500 × 0.00785
= 35.3 kg per bar
Per metre: 75 × 10 × 0.00785 = 5.89 kg/m
Formula: T (mm) × 7.85 = kg/m²
2 mm sheet: 2 × 7.85 = 15.70 kg/m²
4 mm sheet: 4 × 7.85 = 31.40 kg/m²
6 mm sheet: 6 × 7.85 = 47.10 kg/m²
10 mm plate: 10 × 7.85 = 78.50 kg/m²
20 mm plate: 20 × 7.85 = 157.0 kg/m²
Theoretical weight: 5,000 kg
IS 1079 tolerance: −8% on 6mm HR
Min delivery weight: 5000 × 0.92 = 4,600 kg
Add 5% ordering buffer:
Order = 5,000 ÷ 0.95 = 5,263 kg
Always over-order by ~5% to account for IS thickness tolerance and handling scrap.
Never look up a different density value for E250 vs E350 vs E410. They are all 7,850 kg/m³. Set this as a fixed constant in all your Excel BOM templates, estimation sheets and ERP items. The only time you change density is when you change material — from MS to SS, aluminium or another metal.
IS 1079 (HR) allows ±8% thickness tolerance at 6 mm. If you order 6 mm MS and receive material at the IS minimum (5.52 mm actual), your theoretical weight is 8% wrong. For large procurement orders, always request the MTC and recalculate using the actual coil thickness stated — not the nominal ordered thickness.
When ordering IS 2062 MS based on theoretical weight, add a 5% buffer to account for: IS thickness tolerance (up to −8%), cutting kerf losses (0.5–2%), handling damage and handling scrap. For plasma or oxy-fuel cut jobs, add 8–10% for wider kerf and edge dressing. For laser cut jobs with good nesting, 3% may be sufficient.
The fastest mental estimate for MS sheet weight is T (mm) × 7.85 = kg/m². Memorise key values: 2mm=15.7, 4mm=31.4, 6mm=47.1, 8mm=62.8, 10mm=78.5. Then multiply by sheet area in m². A 2.5×1.25m sheet is exactly 3.125 m² — multiply by your kg/m² for instant result, no calculator needed.
For large orders (5 MT+), always weigh incoming material on a calibrated weighbridge and compare to your theoretical calculation. A systematic shortfall of 5–8% on every delivery from a particular supplier indicates they are consistently supplying at the IS tolerance minimum — legal, but worth discussing and accounting for in your PO pricing.
Never apply the MS constant to: SS 304 (use 7.93), SS 316 (use 7.98), SS 202 (use 7.75), Aluminium (use 2.70 — you'll be 190% over!), Copper (use 8.96), Cast Iron (use 7.20). Check the material before touching the calculator — material density is the most common single cause of weight calculation errors in Indian multi-material fabrication estimates.
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