Construction quantities
Main intent: volumeConcrete volume calculator
Estimate the volume for slabs, strip footings, and small concrete elements. Enter the dimensions, add a waste allowance, and use the adjusted figure for ordering.
- Slab volume
- Footing volume
- Column or block volume
A simple slab example you can check quickly
Example build-up
Length: 6 m, width: 4 m, thickness: 0.15 m, waste: 7 percent.
Base volume = 3.6 m3. Adjusted volume with waste = 3.85 m3. Use the adjusted figure as the ordering target.
Formula
Volume = length × width × thickness
Adjusted volume = volume × (1 + waste / 100)
Enter the concrete dimensions
Measurement note
Use overall length, width, and thickness for a slab or footing.
Waste allowance helps cover spill, trimming, and uneven formwork.
The calculator is a rectangular-volume estimator. If your shape is irregular, split it into smaller rectangular sections and add them together.
What each input means
Element type
Choose slab, footing, or column so the labels match the part you are measuring.
Dimensions
Enter the outer dimensions of the pour. Keep all inputs in meters for a direct cubic-meter result.
Waste factor
Add a small allowance so the estimate covers over-pour, trimming, and minor setup losses.
Concrete notes and reference pages
Slab volume guide
How to measure a slab, including thickness, edge treatment, and breakpoints.
Open guideFooting volume guide
Typical strip footing measurements and how to split longer runs into sections.
Open guideConcrete waste guide
Choosing a realistic allowance for spillage, levelling, and formwork variation.
Open guideConcrete pages by exact intent
How much concrete for a driveway
Driveway slab planning with a slightly higher waste allowance.
Open page