Cement Calculator
Calculate the amount of cement needed from a total mix volume and mix ratio.
Calculate
Enter your values below.
Result
Cement volume needed
0
Bags needed
0
Formula used
Cement volume = Total volume × (Cement parts ÷ Total parts)
Example: 2 m³ mix at 1:2:4 ratio → cement volume ≈ 0.286 m³ (about 8 bags at 0.035 m³/bag).
How to use this calculator
- Enter Total mix volume (m³), Cement parts (e.g. 1 in a 1:2:4 mix), Total ratio parts (e.g. 7 for 1:2:4), Volume per cement bag (m³).
- Press Calculate to see your result instantly.
FAQ
Frequently asked questions
What does a 1:2:4 mix ratio mean?
1 part cement, 2 parts sand, and 4 parts aggregate by volume — common for general concrete work.
Where do I find my bag's volume?
A standard 50kg cement bag is often approximated at about 0.035 m³ — check your specific product for accuracy.
Does this account for wastage?
No, add your own contingency percentage on top of this exact calculation.
How is Sand quantity calculated similarly?
See the dedicated Sand Calculator, which uses the same ratio-splitting method.