Room wall paint calculator
Estimate paint for the four walls of a rectangular room.
Your measurements
Enter your project values. Your estimate updates as you type.
View your estimateExample values are a starting point. Check product yields and specifications before ordering.
YOUR ESTIMATE
Paint required
Calculated from your measurements.
How it's calculated
Wall area = 2 × (length + width) × height − openings. Paint = area × coats ÷ coverage, with waste.
Calculations use consistent units for your selected measurements. The waste allowance is applied once to the measured requirement. Whole purchase quantities are rounded up.
What this estimate includes
Ceiling is excluded. Enter the combined area of doors and windows. Coverage depends on the actual paint and surface.
Sherwin-Williams coverage guidanceQuantity and arithmetic estimates only. Use project specifications for installation and design requirements.