Floor Finish Coverage Calculator
Calculate floor finish or coating consumption from area, published coverage, number of coats and an application-loss allowance. The result separates theoretical litres from the amount to purchase.
Coverage inputs
Floor finish requirement
Floor finish coverage formula
The core calculation is straightforward: divide the coated area by the product's coverage per litre and multiply by the number of coats.
Planning litres = theoretical litres × (1 + loss ÷ 100)
Why coats are explicit
A floor receiving two coats does not have the same material demand as a floor receiving one coat. Keeping the coat count visible prevents a common under-ordering error.
Worked example
For 200 m², a 10 m²/L coverage and two coats, the theoretical quantity is 40 L. With 10% application allowance, the planning quantity becomes 44 L. With 20 L containers, three containers would be required.
Coverage is not a universal constant
Different products may publish different coverage bases and may specify particular application tools or film thicknesses. Existing substrate condition and applicator technique can also change practical consumption.
Why product documentation matters
Use the manufacturer's technical data sheet as the primary reference for spread rate, number of coats, dilution, preparation and recoat requirements. The calculator converts that information into a project quantity; it does not replace it.
Common estimating mistakes
Forgetting a second coat, using the wrong coverage unit, assuming zero application loss and comparing products with incompatible coverage bases can all distort procurement.
Frequently Asked Questions
Does coverage include multiple coats?
Enter the coverage per coat and then specify the number of coats.
Why add loss?
To account for practical application variation.
Can I calculate cost?
Yes, using your own price per litre.
Should this choose a product?
No.