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Angle Iron Weight Calculator

Work out angle iron weight instantly with clear inputs, formula shown and shareable results.

About Angle Iron Weight Calculator

An angle is two rectangles that share a corner, so its area is (leg A + leg B - thickness) x thickness, subtracting the overlap that would otherwise be counted twice. Multiplying by steel density gives kilograms per metre, ignoring the small root radius fillet which adds under one percent.

Formulas

Section area

A = (leg A + leg B - thickness) x thickness

Unit weight

kg/m = A mm² x 7.85 / 1000

Worked example

With the default values below, Angle Iron Weight Calculator returns Weight per metre of 4.427. Change any input above and every figure here is recalculated in your browser.

Inputs used

First leg lengthminimum 1 mm
50 mm
Second leg lengthminimum 1 mm
50 mm
Leg thicknessminimum 0.5 mm
6 mm
Length of angleminimum 0.1 m
6 m

Results

Weight per metre
4.427 kg/m
Total weight
26.56 kg
Cross-sectional area
564.0 mm²
Metres per tonne
225.9 m

Step by step

  1. 1Values used
  2. 2Section area
  3. 3Unit weight
  4. 4Weight per metre= 4.427 kg/m
  5. 5Total weight= 26.56 kg
  6. 6Cross-sectional area= 564.0 mm²
  7. 7Metres per tonne= 225.9 m

Assumptions and limits

  • The result is derived only from the 4 inputs listed above. Anything not among them is not part of the calculation.
  • In particular, this calculator does not take inflation, tax, fees or charges or compounding frequency into account.
  • Figures are rounded for display to 3 decimal places, so totals built from several rounded parts can differ slightly from the unrounded arithmetic.

How these calculators are built and tested is described on the Methodology page. If a figure looks wrong, please report it.

Frequently Asked Questions

How is the Angle Iron Weight figure worked out?

A = (leg A + leg B - thickness) x thickness. An angle is two rectangles that share a corner, so its area is (leg A + leg B - thickness) x thickness, subtracting the overlap that would otherwise be counted twice.

Why is the catalogue weight slightly higher?

Rolled angles have a fillet at the root and rounded toes. The fillet adds material the simple rectangle model misses, typically half to one percent.

What values do I need to enter?

This calculator takes 4 inputs: First leg length, Second leg length, Leg thickness, Length of angle. The pre-filled defaults are a realistic worked example — replace them with your own site or project figures.

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