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Concrete Block Fill Calculator — CMU Core Volume, Bags & Cost

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Number of CMU blocks Manufacturer fill volume per block (ft³) Use the exact block/product data.Equivalent core volume filled (%) Placement / waste allowance (%) Mixed yield per bag (ft³) Use the yield printed for the exact grout/concrete product.Price per bag (optional)

Calculated result

49.5 ft³ · 83 bags

Raw scheduled core-fill volume: 45 ft³

Order volume: 1.833 yd³

83 bags at 0.6 ft³ mixed yield each

Optional bag price not entered.

Show the working

1. Raw fill = 180 × 0.25 ft³ × 100% = 45 ft³.
2. With 10% allowance: 45 × 1.1 = 49.5 ft³.
3. Bags = ceil(49.5 ÷ 0.6) = 83.

Material quantity only. Use exact CMU core-fill data and grout/concrete yield. Required filled cells, reinforcement and placement procedure come from the project design and applicable requirements.

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