Paint Calculator

Estimate how much paint you need for walls, including multiple coats and optional deductions for doors and windows.

Walls

Add each wall separately using its height and width.

Doors & Windows — Optional

Add openings only if you want their area subtracted from the walls.

Paint Information

sq ft
$

Paint Needed

Gross Wall Area 0 sq ft
Doors & Windows 0 sq ft
Paintable Wall Area 0 sq ft
Total Area With Coats 0 sq ft
Exact Gallons Needed 0 gal
Whole Gallons To Buy 0

Whole gallons are rounded up so you do not run short.

How This Paint Calculator Works

Add the height and width of each wall. If you want a more precise estimate, add doors and windows so their area can be subtracted.

Paint coverage varies by product and surface. Check the label on the paint you plan to use and change the coverage value if needed.

Note

This calculator provides an estimate. Surface texture, primer, application method, color changes, waste, touch-ups, and paint coverage can affect the actual amount of paint required.