Concrete & Rebar Estimator

Estimate both concrete and steel for a pour. Enter the dimensions to get the concrete volume in m³, yd³ and ft³, plus a steel estimate from a reinforcement ratio (kg/m³).

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How to use: Concrete & Rebar Estimator

Enter length, width and thickness.
Set the steel ratio (kg per m³ of concrete).
Read the volume and steel estimate.

Formula

Volume = L × W × thickness. Steel = volume × ratio (typically 80–120 kg/m³ for slabs).

See the full rebar weight chart (kg/m & lb/ft) →

Concrete & Rebar Estimator — FAQ

How much steel per m³ of concrete?

Roughly 80–120 kg/m³ for slabs, more for columns and beams — design governs.

How do I calculate concrete volume?

Multiply length × width × thickness in consistent units.