HOW IT IS CALCULATED
Estimate cement mass and number of bags
Convert concrete volume into cement mass using a kg/m³ assumption, then divide by bag size.
Instant resultClear formulaRuns locally
01Values
02volume × kg/m³ ÷ bag size
03Result
1 m³ × 300 kg/m³ with 25 kg bags → 12 bags
Cement is only one component of concrete
The kg/m³ assumption depends on the intended concrete mix and should not be confused with total concrete mass.
02
In short
What logic does the calculator use?
volume × kg/m³ ÷ bag size
Example?
1 m³ × 300 kg/m³ with 25 kg bags → 12 bags