How much paint per sq ft for interior walls
Estimate gallons from wall area, coat count, and waste for a cleaner paint takeoff.
Quick answer
You can get a reliable paint quantity quickly if area, coats, and waste are set realistically. Keep estimates simple and purchase-focused.
Most takeoffs start from total wall area and then account for coats and waste. If you are unsure, use conservative assumptions so you do not run short on site.
How to estimate
- Measure wall area in sq ft and subtract major openings.
- Set the number of coats based on color change and surface condition.
- Choose coverage from the product label in sq ft/gal.
- Add a waste allowance for cut-ins, touch-ups, and roller loading.
- Round your final gallons to available container sizes before purchase.
Common assumptions
- Measurements are based on accessible finished surfaces.
- Material labels and supplier packaging data are current.
- Cuts and handling losses depend on jobsite conditions.
- Surface quality affects real consumption during installation.
- Final purchase decisions are validated against product instructions.