Concrete Block Calculator
Enter your wall length, height and block size to get the exact number of concrete blocks, plus the mortar volume needed for the job — a practical starting point for masons and homeowners planning a block wall.
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How to use
- Enter the wall length, height and block width.
- Enter the block face size (usually 16 x 8 inch) and the mortar joint.
- Enter the mix ratio and wastage.
- The full breakdown of blocks, mortar cement and sand will appear.
Note: The block count is calculated with the face-area method (including the joint), while mortar is calculated as the wall volume minus the actual volume of the blocks. Rates change — verify with the official source before relying on this.
Tips
- Add a wastage allowance (typically a few percent) for broken blocks and cuts.
- Mortar estimates assume standard joints — thicker joints use more mortar.
- Verify block prices locally; rates vary between cities and suppliers.
- Measure the wall on site rather than trusting plan drawings alone.