Estimate how many gallons of wall paint to buy before heading to the store.
Gallons To Buy
--
Enter the room dimensions, wall height, coats, and coverage rate to estimate wall paint quantity.
Tap an example to prefill the calculator with sample values.
Bedroom repaint
14 ft x 12 ft room at 8 ft walls
A standard bedroom where two coats usually push the project beyond the “one gallon should be enough” mindset.
Result: The wall-only estimate usually lands around a few gallons once both coats are counted honestly.
Large living room
22 ft x 18 ft room with 9 ft walls
A bigger open room where height and perimeter drive coverage much faster than floor area alone suggests.
Result: Big rooms become multi-gallon projects quickly, especially when you want a clean second coat.
Accent-room refresh
10 ft x 10 ft room with one finish coat
A smaller project where exact gallons matter because a gallon-plus-quart decision may feel more reasonable than buying extra gallons.
Result: Smaller rooms can still exceed one gallon once coverage and touch-up buffer stop being wishful thinking.