How Much Cement Does a House Need?

There's no fixed "cement per house" figure — it depends entirely on the volume of concrete and mortar work in your specific design: foundation size, slab thickness, number of floors, and how much blockwork and plastering is involved.

How it's actually calculated

For any concrete element, you start with its wet volume (length × width × thickness), convert to a dry volume to account for bulking and wastage, then split that dry volume according to your mix ratio (e.g. 1:2:4) to get the cement, sand and ballast portions. Cement is then converted from volume to standard 50kg bags.

What changes the total

• Foundation type and depth — deeper or wider foundations use significantly more concrete
• Slab thickness — even a 25mm difference across a large floor area adds up
• Mix ratio — a richer mix (more cement relative to sand and ballast) is used for higher-strength elements like columns and beams
• Plastering and blockwork mortar, which is often forgotten in early estimates