Estimate only
This estimate uses the dimensions and allowance you enter. Measure the actual area and check the product label before buying paving.
Paving Calculator
Estimate paving area including an allowance for cuts and waste.
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About Paving Calculator
paving-calculator estimates paving slab counts and total patio paving area including joint spacing and cut waste allowances.
How to use Paving Calculator
- Enter patio length and patio width in metres.
- Enter individual paving slab dimensions (e.g. 600mm x 600mm).
- Specify waste allowance percentage (typically 10%).
- Click Calculate to determine slab counts and patio area.
Examples
Patio: 4m x 3m (12m²), Slab Size: 600mm x 600mm, 10% waste Result: 37 paving slabs required.
FAQ
Why include a waste allowance when ordering paving slabs?
Cutting slabs to fit patio edges and drainage channels creates offcuts that cannot always be reused.
What foundation depth is required under paving slabs?
A standard patio requires a sub-base layer of 75mm to 100mm compacted MOT Type 1 aggregate beneath the mortar bed.
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