Floor Screed Calculator
Cement-sand screed (1:4) quantities for floor levelling.
Semi-dry screed should ball in your fist without dripping. Too thin a screed cracks over every pipe — chase services INTO the slab or thicken locally over them.
Formula
Floor Screed Calculator is a free floor screed quantity for civil engineers, contractors and quantity surveyors — instant, accurate and 100% client-side, with the governing formula and reference shown next to the result so the number can be defended, not just quoted.
About Floor Screed Calculator
Cement-sand screed (1:4) quantities for floor levelling. The calculation implements 1:4 mix; dry = V×1.33 (BS 8204; flooring trade practice). Semi-dry screed should ball in your fist without dripping. Too thin a screed cracks over every pipe — chase services INTO the slab or thicken locally over them.
How to use Floor Screed Calculator
- 1Enter Floor area in m².
- 2Enter Screed thickness in mm (Bonded 25–40 · unbonded 50 · floating (on insulation) 65+).
- 3Read Cement bags, Sand instantly — no submit button needed.
- 4Need US units? Flip the SI/Imperial toggle and every field converts.
Why use Floor Screed Calculator?
- ✓Implements the standard formula — 1:4 mix; dry = V×1.33
- ✓Reference cited on-page: BS 8204; flooring trade practice
- ✓One-click SI ⇄ Imperial toggle — values convert in place, physics stays in SI
- ✓Live worked example: the substitution recomputes from your numbers
- ✓Runs entirely in your browser — nothing uploaded, free forever
Frequently asked questions
What formula does the Floor Screed Calculator use?+
It computes 1:4 mix; dry = V×1.33, per BS 8204; flooring trade practice. The formula is displayed under the result along with a worked example substituted with your own inputs.
What should I keep in mind when using this calculator?+
Semi-dry screed should ball in your fist without dripping. Too thin a screed cracks over every pipe — chase services INTO the slab or thicken locally over them.
Does it include wastage?+
Yes — standard wastage/bulking factors are built in and stated in the formula line, so the quantity is an orderable number, not a bare geometric volume.
Is the Floor Screed Calculator free to use?+
Yes — completely free, no sign-up, no limits. It runs client-side in your browser, so inputs stay private and results are instant even on slow connections.
Related Engineering tools
Reynolds Number Calculator
Compute Re from density, velocity, pipe diameter and viscosity — with instant laminar/turbulent classification.
● LiveLaminar vs Turbulent Flow Classifier
Classify hydraulic-oil or process-fluid flow regime from kinematic viscosity, line velocity and tube bore.
● LiveBernoulli Equation Solver
Solve downstream pressure between two points from velocities, elevations and fluid density (ideal, lossless).
● Live