Free project calculators
Know how much to buy before you buy it.
Simple calculators for mulch, topsoil, gravel, paint, wallpaper and concrete. Metric or imperial, with the math shown so you can check it yourself.
Pick a calculatorLandscaping
Beds, borders, paths and driveways — work out bulk materials before you order.
Renovate
Walls, ceilings and finishes — work out how much you need before you buy.
Construction
Slabs, footings and posts — figure out how much concrete to mix or order.
Money
Savings, investing and everyday money decisions — figure out how your money can grow over time.
Why these numbers can be trusted
- Every result shows the full working, step by step.
- Assumptions and material densities are clearly stated.
- No accounts, no signup, no unnecessary clutter.