Count the paving slabs, sub-base, bedding mortar and jointing you need for a patio.
How this works
Slabs = area / (slab + joint) size, plus 5% for cuts (10% for a staggered layout). Lay 10 cm of compacted sub-base for foot traffic (about 2 t per m³) and a 4 cm mortar bed of 6 parts sharp sand to 1 cement. Joints are usually 10 mm.
Questions people ask
How do I use the Paving and Patio Calculator?
Fill in the fields, starting with “Patio length”, “Patio width” and “Slab size”, and change any other options that match your home. The answer, a drawing and practical tips update as you type, and the Copy link button saves your numbers in a link you can share.
Is the Paving and Patio Calculator free?
Yes. The Paving and Patio Calculator is free, with no sign-up, and works on phones, tablets and computers. The results are estimates to help you plan, so check with a qualified professional before structural, electrical, gas or plumbing work.