Construction · Calculator
Cement Bag Calculator
Calculate the number of cement bags needed for a concrete project.
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Cement Bag Calculator
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Estimate how many bags of cement you need based on the concrete volume.
Formula
Bags = Volume / yield per bagStep-by-step
- Determine yield per bag by weight
- Divide total volume by yield
Example
27 ft³ (1 yd³) with 80 lb bags = ~60 bags.
FAQ
How much concrete does a bag yield?+
40 lb: 0.3 ft³, 60 lb: 0.45 ft³, 80 lb: 0.6 ft³.
Should I order extra bags?+
Yes, add 5–10% for waste and spillage.
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Calculate concrete volume in cubic yards, cubic feet, cubic meters, and liters. Includes waste allowance and ordering recommendations.
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