Free construction calculator · Metric and imperial
Concrete Volume Calculator
Calculate concrete volume for slabs, walls, columns, rectangular footings, and circular elements with a configurable waste allowance.
Inputs
Enter measured dimensions
Formula and assumptions
Volume = length × width × depth; order quantity = volume × (1 + waste allowance)
Use measured dimensions from the latest approved information. Check deductions, laps, allowances, material modules, supplier constraints, and rounding rules before ordering or certifying quantities.
The result is an estimate for planning and checking. It does not replace a coordinated quantity takeoff, temporary-works design, structural design, geotechnical assessment, or project-specific engineering review.
Questions
How much waste should I add to concrete volume?
A small allowance is often added for spillage, uneven formation, and placement losses. The right percentage depends on the element, measurement confidence, and project controls.
Does this calculator replace a quantity takeoff?
No. Verify dimensions, deductions, mix requirements, and ordering constraints against the approved drawings and supplier requirements.