Cement Mortar Calculator
Calculate cement, sand and water for mortar.
The Cement Mortar Calculator is a free tool designed for construction professionals and enthusiasts. Calculate cement, sand and water for mortar. Instantly get the required materials broken down by purchase units, with an option to add a wastage allowance so you never run short on site.
Inputs
Result
Result
How to Use This Calculator
- Measure the wall length and height in meters.
- Enter the wall thickness based on the brick or block type you'll use.
- Indicate brick/block dimensions if different from standard.
- Add wastage allowance (5–10 % for face brickwork, 3–5 % for blockwork).
- Click 'Calculate' to see units of material, mortar and cement bags.
Frequently Asked Questions
With a standard brick (24 × 11.5 cm) and a 1 cm joint, you get approx. 38–40 bricks per m² for a half-brick wall. For a full-brick wall, multiply by 2.
Subtract the area of each opening (width × height) from the total before entering it in the calculator. Standard door: 0.9 × 2.1 m = 1.89 m². Windows: as measured.
The most common ratio is 1:4 (cement:sand) for external walls and 1:5 for internal walls. This calculator gives you the cement and sand quantities directly.