All calculators
Free calculators for UK patios, drives, paths, bases and materials. Each one works out what to order, using UK bag sizes, skip sizes and densities.
Whole-job calculators
Everything to order for a complete patio, drive, path or base.
Patio materials calculator →
Work out the Type 1, cement, sharp sand, slabs and skip for a patio laid on a semi-dry mortar bed. Change any value and the order list updates straight away.
Block paving calculator →
Work out the blocks, Type 1, sharp sand, kiln-dried jointing sand, edging and skip for a block paved driveway or patio.
Concrete driveway calculator →
Work out the ready-mix concrete, or the cement and ballast to mix it yourself, plus Type 1, mesh, membrane, formwork, expansion joints and skip for a concrete drive.
Garden path calculator →
Work out the slabs, Type 1, sand and cement for a slab garden path on a mortar or sharp sand bed.
Shed base calculator →
Work out the concrete, Type 1, mesh, DPM and formwork for a concrete shed or outbuilding base.
Material calculators
Quick answers for one material or job.
Type 1 sub-base calculator →
Work out how many tonnes or bulk bags of Type 1 (MOT) you need for a patio, path or driveway sub-base.
Concrete calculator →
Work out the concrete for a slab, base, footing trench or post holes, as ready-mix m³ or cement and ballast to mix yourself.
Skip size calculator →
Work out what size skip, how many skips, or how many grab lorry loads you need for the soil you're digging out.
Gravel calculator →
Work out how much decorative gravel you need, in tonnes, bulk bags or small bags, for a border, path or driveway.
Topsoil calculator →
Work out how much topsoil you need for a new lawn, flower bed or raised bed, including extra for the soil settling.