Brick, Cement & Sand Calculator for Walls
Estimate materials for brickwork before you order – bricks, cement bags and sand in cft.
How to use the Brick, Cement & Sand Calculator
- Measure the wall length and height and choose feet or metres.
- Subtract openings such as doors and windows.
- Choose thickness, brick size and mortar ratio.
- Press Calculate.
How the brick calculation works
- Wall volume = (length × height − openings) × thickness.
- Volume of one brick with mortar = (L + 10 mm) × (W + 10 mm) × (H + 10 mm).
- Number of bricks = wall volume ÷ brick-with-mortar volume.
- Mortar = wall volume − volume of bricks. Dry mortar = wet × 1.33.
- Cement and sand are split by the ratio. One 50 kg bag of cement ≈ 0.0347 m³.
Fly ash bricks vs red bricks
Fly ash bricks are widely made in Odisha near thermal power plants. They are uniform in size, need less mortar and plaster, and are lighter on the structure. Red clay bricks have good strength but vary more in size. The calculator supports both.
Common mortar ratios
- 1:6 – general 9-inch walls.
- 1:4 – 4.5-inch partition walls for extra strength.
This is an estimate. Ask your engineer or contractor to confirm quantities for your design.
Frequently asked questions
How many bricks are needed for 100 sq ft of 9-inch wall?
Roughly 850–1,100 depending on brick size and joints. Use the calculator with your exact size.
Why add wastage?
Some bricks break during transport and cutting. 5% is a common allowance.
Is this for plaster too?
No. It covers brick masonry mortar only, not plastering.
Last updated: 10 November 2026