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Steel Angle (L-Shape) Weight Calculator

Calculate a steel angle's weight per unit length from its leg dimensions and thickness.

Computed in your browser — nothing you enter is uploaded. Figures are presented for United States against IRC 2024, and every formula is cited under regulatory standards below.

Last verified 2026-08-26 · v1.0.0

Market
Imperial · sales tax

Weight per meter

14.92 kg/m

Check your inputs

Simplified approximation omitting fillet/toe radius area — for exact values, use the published shapes table for your specific angle designation.

Cross-sectional area
1900 mm²

For the dimensions entered, expect a weight per meter of 14.9 kg/m. Moderate confidence — sound arithmetic, but allow for the variation any real site introduces. Set for United States against IRC 2024. The market selector changes both the units and the code cited.

Add the equipment this sizes

This result is a specification — 14.915 kg/m — not a quantity. Put the thing it sizes into your project: how many, what you call it, and your supplier’s price.

Preliminary estimate, not certified engineering. This tool produces an indicative quantity calculation for planning purposes only — it is not a certified structural analysis, a guaranteed material takeoff, or a substitute for building department approval. Always verify measurements on-site and have a licensed contractor or structural engineer review any load-bearing, code-sensitive, or safety-critical work before purchasing materials or starting construction. Spotted an arithmetic or standards error? Report it to contact@craftquantities.com with your inputs — confirmed fixes become pinned regression tests.

[Schema Verified] Computed in alignment with American Concrete Institute (ACI 318-19) formulas and International Residential Code (IRC 2024) spatial boundaries.

Regulatory standards & verification citations

  • Simplified angle cross-sectional area = (leg1 + leg2 − thickness) × thickness, omitting fillet/toe radius area; weight per unit length = area × steel density (7850 kg/m³)

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Most jobs need more than one number. Add the calculators you need next and they open right here, underneath this one — your figures stay on screen and nothing is lost to a page change.

Frequently asked questions

How accurate is this simplified angle weight formula?
This approximation treats the angle as a rectangle with area (leg1 + leg2 − thickness) × thickness, omitting the small area contributed by the fillet at the heel and the rounded toes — actual weight per published shape tables will be slightly higher than this simplified estimate.
What if the angle has unequal legs?
Enter each leg's actual length in Leg 1 and Leg 2 — the formula works the same way for equal-leg or unequal-leg angles, since it only depends on the sum of the two leg lengths and the thickness.
Where can I get the exact published weight for a standard angle size?
Use a published structural shapes table (e.g. AISC or your regional steel manufacturer's catalog) for your specific angle designation, which accounts for fillet radius and rolling tolerances precisely.