Construction calculators

Measurements in, quantities out. Every calculator is free, works in metric and imperial, and shows the assumptions behind the answer.

7 calculators

Paint Calculator

Work out how much paint you need for any room or wall.

Volume of concrete for a slab, footing, path or column.

How many tiles and boxes you need for a floor or wall.

How many packs of flooring a room needs, with waste allowed for.

Build a project estimate from materials, labour, waste and markup.

Work out the volume and tonnes of gravel for a path, driveway or base layer.

Plan room appliances, lighting, socket positions, cable quantities and preliminary circuit sizes.