Screed calculator: how many bags per m²
Area, layer thickness and the usage in kg per m² and mm give the number of bags of screed, levelling compound or plaster.
Your figures
Result
The figures changed. Press “Calculate again” to see the new result.
Building material catalogue — 16 materials in the catalogue
How we calculate it
What you enter
- Area (m²)
- Thickness (mm)
- Usage (kg/m²/mm)
- Bag (kg)
What to watch out for
The conversion assumes a density of about 2.0 kg per litre of mortar. Anhydrite screeds and lightweight screeds have a different density — check the bag.
Formula
kilograms = Area × Thickness × Usage
bags = ⌈ kilograms ÷ Bag ⌉The site's engine is a 1:1 port of the Android app's code.
Frequently asked questions
How many bags of screed per m²?
Usage is given in kilograms per square metre and millimetre of thickness. The calculator multiplies it by the area and the thickness and divides the total by the bag weight.
What usage figure should you enter?
The conversion assumes roughly 2.0 kg per litre of mortar. Anhydrite screeds and lightweight screeds have a different density, so check the value on the bag.
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