DIY & materials
Sand and cement screed Calculator
Estimate dry screed materials from thickness and mix proportions. This free sand and cement screed calculator shows the calculation and its assumptions so you can compare your own figures.
Your results
Estimate dry screed materials from thickness and mix proportions.
Calculated outcomes
- Wet Volume M3
- 2.6 m³
- Dry Volume M3
- 3.804 m³
- Cement Kg
- 1,095.49 kg
- Sand Kg
- 4,868.86 kg
Assumptions and estimates
- Method: Dry volume = wet volume × selected factor × waste factor. Split by volumetric ratio, then multiply by bulk densities.
- Material estimate, not a certified mix design. Water, admixtures, strength, reinforcement, movement joints and substrate preparation require the specified system.
Useful next steps
- Use Compare options to test an alternative side by side.
- Copy, print or download a record of this calculation when you need one.
Reports open your email app addressed to s@s1.ie with the public page address only. Your inputs are never added.
How the sand and cement screed calculation works
Dry volume = wet volume × selected factor × waste factor. Split by volumetric ratio, then multiply by bulk densities.
Material estimate, not a certified mix design. Water, admixtures, strength, reinforcement, movement joints and substrate preparation require the specified system.
Using this calculator
- Enter your own figures in the labelled inputs. Keep the currencies, units and time periods consistent.
- Choose any applicable rate profile, pattern or assumption shown for this tool. Open additional inputs when relevant.
- Review cement bags and sand tonnes, then read the stated assumptions and eligibility conditions before using the result.
Worked example
This is a static example using illustrative inputs, not facts about you or today’s date. The displayed eligibility selections and assumptions apply only to this example.
See example inputs
- Floor area (m²)
- 40
- Screed depth (mm)
- 65
- Dry-to-wet volume factor
- 1.33
- Sand parts per one cement part
- 4
- Bulk cement density (kg/m³)
- 1440
- Bulk sand density (kg/m³)
- 1600
- Cement bag weight (kg)
- 25
- Waste allowance (%)
- 10
- Cement Bags
- 44
- Sand Tonnes
- 4.869 t