What concrete density does this calculator use?

This calculator uses 2400 kg/m³, the standard density for plain (unreinforced) concrete. Reinforced concrete is typically around 2500 kg/m³ due to embedded steel. For a conservative estimate of reinforced beams, add roughly 4% to the result.

Can I enter dimensions in millimeters?

Yes. Select "mm" from the unit selector and enter all three dimensions in millimeters. The calculator automatically converts to meters before computing volume.

How is the beam weight calculated?

Weight (kg) = Width (m) × Height (m) × Length (m) × 2400. The result is then converted to pounds by multiplying by 2.20462.

Does this work for T-beams or L-beams?

No. This tool only handles rectangular (solid) cross-sections. For T-beams or other composite shapes, calculate the weight of each rectangular sub-section separately and add the results.

What is the difference between beam height and depth?

In structural engineering, beam height and beam depth refer to the same dimension — the vertical measurement of the cross-section from top to bottom. Both terms are used interchangeably; enter whichever label your drawings use.

Concrete Beam Weight Calculator

Enter the width, height, and length of a rectangular concrete beam to instantly calculate its weight in kg and lbs.

Beam Dimensions

All dimensions must use the same unit.

Unit

Millimeters (mm) Meters (m)

Width (mm)

Height (Depth) (mm)

Length (Span) (mm)

Weight Result

Enter dimensions and click Calculate

Formula Reference

Volume (m³) = W × H × L

Weight (kg) = Volume × 2400

Weight (lbs) = Weight (kg) × 2.20462

W = Width, H = Height, L = Length (all in meters)

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Summary

Enter the width, height, and length of a rectangular concrete beam to instantly calculate its weight in kg and lbs.

How it works

Enter the width of the beam cross-section.
Enter the height (depth) of the beam cross-section.
Enter the total length (span) of the beam.
Select your preferred unit — millimeters (mm) or meters (m).
The calculator computes volume as Width × Height × Length, then multiplies by 2400 kg/m³.
Results appear instantly in both kilograms and pounds.

Use cases

Estimate the self-weight of concrete beams for structural load calculations.
Plan crane and rigging capacity before lifting precast beams on site.
Calculate transport payload for delivery of precast concrete beams.
Verify material quantities and costs for concrete beam fabrication.
Check beam weight during preliminary structural design.
Teaching and learning reinforced concrete design concepts.
Quick weight estimates for foundation sizing under heavy beams.

Frequently Asked Questions

Last updated: 2026-09-20 · Reviewed by Nham Vu