Angle Weight Calculator (IS 808)
Equal & unequal angle weight per meter as per IS 808 — 25×25 to 200×200 mm
Unit Weight
22.800 kg
Material
Mild Steel
Est. Cost
₹1,299.60
@ ₹57/kg
Density
7,850 kg/m³
Indicative market rate as of 16 Sept 2026, excluding 18% GST and freight. Actual prices vary by city, brand and quantity.
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📐 Angle Weight
W = Unit Weight (kg/m) × Length (m)
Ref = IS 808 nominal unit weight · Approx. = (A + B − t) × t × 0.00785 kg/m
How MS Angle Weight Is Calculated
Structural steel angles cannot be weighed accurately using simple width × thickness × length formulas. Unlike flat bars, rolled angles have a curved inner root radius at the junction of the two legs and rounded toes at the outer edges. These curves add material that the simple formula (A + B − t) × t × 0.00785 misses, so the formula usually comes out about 1–3% lower than the IS 808 table value (e.g. 50×50×6: 4.42 kg/m by formula vs 4.5 kg/m in the table).
This calculator uses the nominal unit weight per metre as listed in IS 808 (Dimensions for Hot Rolled Steel Beam, Column, Channel and Angle Sections). Select the angle size, enter the length in mm, and the tool multiplies the unit weight by the length to give the total weight in kg.
Both equal angles (both legs the same width) and unequal angles (e.g. 75×50×6) are supported — use the toggle above. The designation "50×50×5" means both legs are 50mm wide and the thickness is 5mm. (IS 808:2021 designates angles by leg sizes and thickness; the older "ISA" prefix is still widely used in trade.) Standard supply lengths are 6 metres and 12 metres, though custom cutting is available from most stockists.
Worked Example — 50×50×6 Angle, 12m Length, 20 Pieces
For a roof truss fabrication job requiring 20 pieces of 50×50×6 angle at 12 metres each:
- Unit weight of 50×50×6 (IS 808) = 4.5 kg/m
- Weight per 12m piece = 4.5 × 12 = 54.0 kg
- Total weight for 20 pieces = 54.0 × 20 = 1,080 kg (1.08 tonnes)
When ordering, add 3–5% extra for cutting waste, end trims, and manufacturing tolerance — approximately about 1.11 to 1.13 tonnes for this example.
IS 808 Angle Weight Chart — Equal & Unequal
Commonly stocked equal angles from 25×25 to 200×200 and unequal angles from 40×25 to 200×150, with weight per metre, weight per standard length, and pieces per tonne. The table follows the toggle above.
| Size (mm) | Thickness | kg/m | 6m Piece (kg) | 12m Piece (kg) | Pieces/Tonne (12m) |
|---|---|---|---|---|---|
| 25×25 | 3 mm | 1.1 | 6.6 | 13.2 | 75 |
| 25×25 | 5 mm | 1.8 | 10.8 | 21.6 | 46 |
| 30×30 | 3 mm | 1.4 | 8.4 | 16.8 | 59 |
| 40×40 | 3 mm | 1.8 | 10.8 | 21.6 | 46 |
| 40×40 | 5 mm | 3 | 18.0 | 36.0 | 27 |
| 40×40 | 6 mm | 3.5 | 21.0 | 42.0 | 23 |
| 50×50 | 5 mm | 3.8 | 22.8 | 45.6 | 21 |
| 50×50 | 6 mm | 4.5 | 27.0 | 54.0 | 18 |
| 60×60 | 6 mm | 5.4 | 32.4 | 64.8 | 15 |
| 65×65 | 5 mm | 4.9 | 29.4 | 58.8 | 17 |
| 65×65 | 6 mm | 5.8 | 34.8 | 69.6 | 14 |
| 65×65 | 8 mm | 7.7 | 46.2 | 92.4 | 10 |
| 75×75 | 6 mm | 6.8 | 40.8 | 81.6 | 12 |
| 75×75 | 8 mm | 8.9 | 53.4 | 106.8 | 9 |
| 75×75 | 10 mm | 11 | 66.0 | 132.0 | 7 |
| 90×90 | 6 mm | 8.2 | 49.2 | 98.4 | 10 |
| 90×90 | 8 mm | 10.8 | 64.8 | 129.6 | 7 |
| 90×90 | 10 mm | 13.4 | 80.4 | 160.8 | 6 |
| 100×100 | 8 mm | 12.1 | 72.6 | 145.2 | 6 |
| 100×100 | 10 mm | 14.9 | 89.4 | 178.8 | 5 |
| 100×100 | 12 mm | 17.7 | 106.2 | 212.4 | 4 |
| 150×150 | 12 mm | 27.2 | 163.2 | 326.4 | 3 |
| 150×150 | 16 mm | 35.8 | 214.8 | 429.6 | 2 |
| 200×200 | 16 mm | 48.5 | 291.0 | 582.0 | 1 |
| 200×200 | 20 mm | 60 | 360.0 | 720.0 | 1 |
Source: IS 808 nominal weights, cross-checked with a Sept 2026 stockist chart (steeltube.co.in). Values are rounded to 0.1 kg/m. Actual weights vary within the rolling tolerances of IS 1852.
Common Applications of MS Angles
In roof trusses, angles form the top chord, bottom chord, and diagonal web members. A typical Pratt or Howe truss for a 15m span industrial shed uses ISA 65×65×6 to ISA 100×100×8 depending on loading. The angles are connected using gusset plates and bolts or welds at each node.
In building frames, angles serve as bracing members (cross bracing or K-bracing) that resist lateral forces from wind and seismic loads. Tower structures — transmission line towers, telecom towers, and observation towers — are almost entirely built from angle sections because they can be easily bolted at various orientations.
Smaller angles (25×25 to 40×40) are commonly used for window grills, gate frames, furniture fabrication, and shelf brackets. Medium angles (50×50 to 75×75) suit door frames, staircase stringers, and platform railings. Larger angles (100×100 and above) are heavy structural members used in trusses, crane gantry bracings, and industrial plant structures.