Advanced Brick & Mortar Estimator
Calculate the precise number of bricks, cement bags, and sand quantity required for any masonry wall. Enter dimensions in meters, feet, or inches, and apply standard IS-code mortar ratios and wastage formulas automatically.
| Total Wall Volume | — m³ |
| Volume of 1 Brick (with mortar) | — m³ |
| Wet Mortar Volume Required | — m³ |
| Dry Mortar Volume (1.33 Factor applied) | — m³ |
| Total Sand Required | — Cubic Feet (cft) |
| Sand Weight Estimate | — Tonnes |
Mastering Brick & Mortar Estimation Formulas
How to Calculate Number of Bricks?
To find the exact number of bricks, you divide the total volume of the wall by the volume of a single brick WITH mortar. The formula is:
Number of Bricks = Volume of Wall ÷ Volume of one brick with mortar
For example, if your wall volume is 1 m³ and you are using standard modular bricks (190x90x90 mm) with a 10mm mortar joint, the nominal size of the brick becomes 200x100x100 mm (0.2 x 0.1 x 0.1 m = 0.002 m³). Thus, 1 m³ ÷ 0.002 m³ = 500 bricks per cubic meter.
Why Use a Dry Volume Factor for Mortar?
When you mix dry cement and sand with water, the volume shrinks because water fills the voids between the sand particles. To get the required amount of dry raw materials, civil engineers multiply the wet mortar volume by a Dry Volume Factor of 1.33 (i.e., adding 33% extra).
How are Cement and Sand Quantities Calculated?
Once you have the Dry Volume of mortar, you use your mix ratio. If the ratio is 1:6 (1 part cement to 6 parts sand):
- Sum of ratio: 1 + 6 = 7
- Cement Volume: (1 / 7) × Dry Volume. To get bags, multiply this by 1440 kg/m³ (density of cement) and divide by 50 kg.
- Sand Volume: (6 / 7) × Dry Volume. To convert cubic meters to cubic feet (cft), multiply by 35.3147.