Results are estimates for planning and buying. Always add a little extra and check with your engineer or supplier.

About the construction calculator

Estimate the materials you need for a building job before you buy. Enter your measurements and the tool works out how many tiles and boxes, how much paint, how many bags of cement with the sand and gravel for concrete, how many blocks or bricks, how many pipes, and how much water a tank holds. It helps contractors, builders and homeowners budget accurately, cut waste and order the right amount the first time. Free and no sign-up.

Frequently asked questions

What can I estimate?

Tiles, paint, concrete (cement, sand and gravel), blocks or bricks, pipes, and the size of a water tank.

Which units does it use?

Enter measurements in metres or feet; the tool handles the conversion.

How accurate is it?

It gives a close estimate for ordering. Add about 5–10% extra for waste and spillage on site.