screed
Floor screed
Calculate screed volume, cement, and sand for floor leveling.
Results are approximate. Verify with manufacturer specifications or consult a professional.
Project inputs
IMPERIAL
Enter a value in ft².
Enter a value in ft.
Enter a value in %.
Enter a value in %.
Includes breakage, spillage, onsite adjustments
Material output
Updates instantly as you type.
Primary output
0.2yd³
0.2 yd³
≈ 0.19 yd³ primary output
Cement weight
Your units
14.07 lb
Cement bags (50kg)
Your units
1 ea
Sand volume
Your units
0.18 yd³
Results are approximate. Verify with manufacturer specifications or consult a professional.
How it works
Frequently asked questions
Country defaults
United States · USD · imperial
Waste factor: 6.0%
Context & guidance
Results are approximate. Verify with manufacturer specifications or consult a professional.
About This Calculator
Calculate the exact amount of screed material needed for floor leveling. Accounts for floor area, screed thickness, material type (cement, self-leveling, anhydrite), waste factors (typically 5-10% for standard applications), and country-specific coverage rates. Screed is typically applied 30-75mm (1.2-3in) thick depending on application. Supports both metric and imperial units.
Step-by-Step Instructions
Measure Floor Area
Measure room length and width at the widest points. For irregular rooms, break them into rectangles and measure each section. Standard residential rooms are 3-5m (10-16ft) wide and 4-6m (13-20ft) long. Include all areas: closets, alcoves, under-stair spaces.
Determine Screed Thickness
Standard thickness: 40-50mm (1.6-2in) for most applications. Minimum: 30mm (1.2in) for light traffic, 50-75mm (2-3in) for heavy traffic or uneven substrates. Thicker screed = more material needed.
Select Screed Type
Choose material: traditional cement screed (typical coverage 0.02-0.03 m³ per m² per 10mm thickness), self-leveling compound (varies by product), or anhydrite screed (similar to cement). Coverage depends on thickness and material density.
Account for Waste Factor
Standard applications need 5-10% waste for application losses, leveling variations, and edge work. Complex shapes or uneven substrates may need 10-15% waste. The calculator applies country-specific defaults.
Calculate Material Needed
The calculator shows: total floor area, screed volume needed (including waste), and number of bags required. Always round up to full bags. Order 5-10% extra for future repairs.
Order Materials
Order all screed from the same batch for consistency. Buy 5-10% extra for future repairs. Store in a dry location. Calculate primer separately if required for the substrate.
Common Mistakes
Not measuring at widest points
Always measure at the room's widest points, not just one corner. Rooms are rarely perfectly square, and measuring narrow points leads to material shortages.
Underestimating thickness requirements
Minimum thickness is 30mm (1.2in) for light traffic, 50-75mm (2-3in) for heavy traffic or uneven substrates. Thinner screed may crack or fail. Always verify thickness requirements with local building codes.
Forgetting to include small areas
Include all areas: closets, alcoves, under-stair spaces, and any nooks. These small areas add up and can account for 5-10% of total floor area.
Not ordering extra for future repairs
Always order 5-10% extra. Screed gets damaged during construction or renovations, and you'll need matching material for repairs. Different batches may have slight variations.
Pro Tips
Buy all screed from the same batch. Different batches can have slight density or color variations that affect finish consistency.
For uneven substrates, measure thickness at multiple points and use average. Very uneven floors may need thicker screed (50-75mm) to achieve level surface.
Calculate primer separately if required. Some substrates (concrete, wood) require primer before screeding. Primer coverage: typically 8-12 m² per liter.
Plan your application sequence. Screed needs proper curing time (typically 24-48 hours) before applying floor coverings. Factor this into your project timeline.
Keep 5-10% extra screed for future repairs. Store in a dry location in sealed containers to prevent moisture damage.
For self-leveling compounds, verify coverage with manufacturer specifications. Coverage varies significantly by product and thickness.
Frequently Asked Questions
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