Updated
March 27, 2026
Reviewed against the current calculator logic, structured content, and internal linking used on BuildCostLab.
Paving and Patio Estimating
Estimate patio bedding sand before you price the base and slabs together
Patio builds often combine several layers, so this page helps isolate the bedding sand quantity before the rest of the order is finalised.
Methodology
Planning-first estimate
Use this guide to build a rough material estimate, then confirm it against product data, site conditions, and supplier buying formats before you order.
Trust
How we publish
See the calculator methodology and editorial policy for the standards behind these pages.
Use the calculator first
The quickest path is to start with Paving Sand Calculator, then use this guide to sense-check the result and decide what to buy next.
Why this page exists
Best for aggregates, soils, screeds, and fill materials where the order usually starts with volume, then converts into tonnes, bags, or bulk units. On this page, that usually means turning simple measurements into a more practical material order.
Core assumption
Volume calculators assume the job can be reduced to length, width, depth, and a practical density or buying-unit conversion.
Common mistake
Depth mistakes are the biggest problem, followed by using the wrong density and forgetting that loose and compacted materials do not behave identically.
Next step links
Open the full Paving and Patio Estimating cluster or go straight to the Paving Sand Calculator.