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Concrete Volume & Materials Estimator

Concrete Block Calculator

Estimate the number of blocks, total cost, and mortar bags needed for your wall.

Choose from the most common U.S. block sizes or enter your own.

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Enter wall and block dimensions to see the estimate.
Mortar estimation

On average, three standard mortar bags bond about 100 concrete blocks (≈ 1 bag per 33.3 blocks). This is a rough estimate; the actual amount depends on mortar type and joint thickness.

Tip: As with any construction project, order at least 10% extra material to cover cuts, breakage, and surprises on site.