Concrete calculator: how many bags per m³
Volume and the yield of one bag give the number of bags of dry mix and roughly how much water it takes to mix them.
Your figures
Result
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How we calculate it
What you enter
- Volume (m³)
- Bag yield (l)
What to watch out for
The conversion assumes a 25 kg bag of dry mix yielding about 12.5 l of concrete. Check the yield on the bag — it differs between manufacturers.
Formula
litres = Volume × 1000
bags = ⌈ litres ÷ Bag yield ⌉
water ≈ bags × 2 lThe site's engine is a 1:1 port of the Android app's code.
Frequently asked questions
How many bags of concrete make 1 m³?
A cubic metre is 1000 litres of mixed concrete. Divide those litres by the yield printed on the bag; the calculator rounds the result up to whole bags.
How many litres does one bag give?
The conversion assumes a 25 kg bag yielding about 12.5 l of concrete. Check the yield on your own bag, it differs between makers, and enter it in the form.
The same formula in the app LiczMat for Android uses the same engine offline — with the material catalogue and results saved into a project. Download