Free project calculators
Know how much to buy before you buy it.
Simple calculators for mulch, topsoil, gravel, paint and concrete. Metric or imperial, with the maths shown so you can check it yourself.
Pick a calculatorLandscaping
Beds, borders, paths and driveways — work out bulk materials before you order.
Painting
Rooms, walls and ceilings — estimate paint without over-buying.
Construction
Slabs, footings and posts — figure out how much concrete to mix or order.
Why these numbers can be trusted
- Every result shows the full working, step by step.
- Assumptions and material densities are stated on each calculator.
- No accounts, no ads-first clutter, nothing to sign up for.