MyYardCalcHow to use this paint calculator
Use the product’s coverage per coat. Rough or porous surfaces and major color changes can alter actual consumption.
Primer and finish coats are separate products. Run the calculator for each coating using its own coverage and can size.
Paint = net surface × coats × allowance factor ÷ labeled coverage per coat. Cans round up.
A worked example
With the example values shown below, the calculated result is 2.081 US gal. These are demonstration inputs, not installation specifications.
View the example measurements
- Room length: 12 ft
- Room width: 10 ft
- Wall height: 8 ft
- Openings to subtract: 21 sq ft
- Number of coats: 2
- Product coverage per coat: 350 sq ft / US gal
- Paint can size: 1 US gal
- Extra allowance: 10 %
From estimate to order
Whole packages and pieces round up; measured lengths, areas and volumes keep full precision during calculation. Match the product dimensions and units to your quote, and check cuts, minimum orders and delivery before purchasing.