Calculating your screed volume is straightforward once you know the Floor Screed formula and what each input means. This guide explains the method in plain language, walks through a manual calculation, and gives worked examples you can follow — then you can do it instantly with the Floor Screed Calculator.
What is Floor Screed?
The Floor Screed calculation tells you your screed volume from a few simple inputs. The figure you are solving for here is the screed volume.
The Floor Screed formula
The core formula is:
Screed volume = Floor length × Floor width × Screed thickness ÷ 1000Here is what each input means:
- Floor length — a value measured in m. Example: 10 m.
- Floor width — a value measured in m. Example: 5 m.
- Screed thickness — a value measured in mm. Example: 50 mm.
- Screed density — a value measured in t/m³. Example: 2.2 t/m³.
How to calculate it step by step
- Write down the floor length (for example, 10 m).
- Write down the floor width (for example, 5 m).
- Write down the screed thickness (for example, 50 mm).
- Write down the screed density (for example, 2.2 t/m³).
- Apply the formula above to get your screed volume.
- Double-check the result with the Floor Screed Calculator.
Worked examples
Example 1
| Input / Output | Value |
|---|---|
| Floor length | 10 m |
| Floor width | 5 m |
| Screed thickness | 50 mm |
| Screed density | 2.2 t/m³ |
| Screed volume | 2.500 |
| Screed weight | 5.50 |
With floor length of 10 m, floor width of 5 m, screed thickness of 50 mm and screed density of 2.2 t/m³, the screed volume works out to 2.500.
Example 2
With floor length of 20 m, floor width of 5 m, screed thickness of 50 mm and screed density of 2.2 t/m³, the screed volume works out to 5.000.
| Result | Value |
|---|---|
| Screed volume | 5.000 |
| Screed weight | 11.00 |
Example 3
With floor length of 5 m, floor width of 5 m, screed thickness of 50 mm and screed density of 2.2 t/m³, the screed volume works out to 1.250.
| Result | Value |
|---|---|
| Screed volume | 1.250 |
| Screed weight | 2.75 |
Tips for an accurate result
- Keep your units consistent — mixing, say, months with years or grams with kilograms is the most common source of error.
- Round only at the very end. Rounding inputs early can shift the final answer noticeably.
- Re-run the numbers whenever an input changes, rather than estimating from an old result.
Prefer not to do the maths by hand? — the Floor Screed Calculator does it instantly, for free, with the formula and a worked example built in.
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