๐งฑ Construction
Paint Calculator
A gallon of interior paint covers roughly 350 to 400 square feet per coat on smooth drywall and less on porous or textured surfaces. Extra coats are needed over dark colours, bare patches or when changing from a saturated to a light colour.
How it works
Surface area
Number of coats
Coverage per gallon
Price per gallon
Total area to paint
Gallons needed
Cans to buy
Estimated cost
Frequently asked questions
How do I use the Paint Calculator?
Fill in the fields above โ the result recalculates instantly as you type. Everything runs in your browser, so the values you enter are never collected or stored.
Is this calculator free?
Yes. It is completely free, requires no account, and works on phones, tablets and desktops.