Overview
What Is a Paint Calculator?
This tool calculates how many gallons of paint you need based on wall area and standard paint coverage rates.
Calculate how much paint you need for your project.
This tool calculates how many gallons of paint you need based on wall area and standard paint coverage rates.
Useful for planning a room paint job and estimating how much paint to purchase.
Input the total wall length and height.
Input how many coats you plan to apply.
The result updates automatically based on standard coverage rates.
Typically around 350 square feet per gallon, though this varies by paint brand, type, and surface texture.
Two coats is standard for most projects, especially when covering a different color or achieving even coverage.
For precise estimates, yes - subtract their area from your total wall area, though many people round up for simplicity anyway.
Yes, textured surfaces typically require more paint than smooth surfaces for the same area.
Calculate ceiling area separately and add it to your total, since ceiling paint coverage follows similar math.
A little extra is wise for touch-ups later, though most people buy close to the calculated amount plus a small buffer.
This calculator estimates topcoat paint - primer would typically be calculated and purchased separately.
No, calculations happen entirely in your browser.
Yes, significant color changes (especially dark to light) may need an extra coat or primer for full coverage.
Yes, completely free with no sign-up required.