ToolJoltTools

I-Beam Section Properties Calculator

I, S and area of a doubly-symmetric I-section from its plate dimensions.

0
I (strong axis) (cm⁴)
0
S (strong axis) (cm³)
0
I (weak axis) (cm⁴)
0
Steel weight (kg/m)

Flanges do the bending (≈ 85% of I_x), the web does the shear — the I-shape is division of labour in steel. Compare your fabricated girder against rolled tables before cutting plate.

Formula

I_x = [BH³ − (B−t_w)h_w³]/12
References: IS 808 / AISC shapes database

I-Beam Section Properties Calculator is a free i beam properties for structural engineers, fabricators and site engineers — instant, accurate and 100% client-side, with the governing formula and reference shown next to the result so the number can be defended, not just quoted.

About I-Beam Section Properties Calculator

I, S and area of a doubly-symmetric I-section from its plate dimensions. The calculation implements I_x = [BH³ − (B−t_w)h_w³]/12 (IS 808 / AISC shapes database). Flanges do the bending (≈ 85% of I_x), the web does the shear — the I-shape is division of labour in steel. Compare your fabricated girder against rolled tables before cutting plate.

How to use I-Beam Section Properties Calculator

  1. 1Enter Overall depth H in mm.
  2. 2Enter Flange width B in mm.
  3. 3Enter Flange thickness in mm.
  4. 4Enter Web thickness in mm.
  5. 5Read I (strong axis), S (strong axis), I (weak axis) instantly — no submit button needed.
  6. 6Need US units? Flip the SI/Imperial toggle and every field converts.

Why use I-Beam Section Properties Calculator?

  • ✓Implements the standard formula — I_x = [BH³ − (B−t_w)h_w³]/12
  • ✓Reference cited on-page: IS 808 / AISC shapes database
  • ✓One-click SI ⇄ Imperial toggle — values convert in place, physics stays in SI
  • ✓Runs entirely in your browser — nothing uploaded, free forever

Frequently asked questions

What formula does the I-Beam Section Properties Calculator use?+

It computes I_x = [BH³ − (B−t_w)h_w³]/12, per IS 808 / AISC shapes database. The formula is displayed under the result.

What should I keep in mind when using this calculator?+

Flanges do the bending (≈ 85% of I_x), the web does the shear — the I-shape is division of labour in steel. Compare your fabricated girder against rolled tables before cutting plate.

Can I use this for real structural design?+

It implements the exact textbook/code formula cited below the result and is ideal for sizing, checking and learning. Final designs should be verified by a qualified engineer against the full code with all load cases.

Is the I-Beam Section Properties Calculator free to use?+

Yes — completely free, no sign-up, no limits. It runs client-side in your browser, so inputs stay private and results are instant even on slow connections.

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