How Much Paint for a 12x14 Room?
The short answer: 3 gallons for two coats — and this is the room size where rounding up really hurts.
A 12x14 room with 8-foot ceilings needs 3 gallons of paint for two coats. The exact requirement is 2.09 gallons. You are 2 % over two gallons, and you still have to buy a third. There is no way around it — which is why this room size is worth planning carefully.
Estimates only. Textured walls, high ceilings, sprayers and major colour changes can all increase the amount you need. Always buy slightly more than the calculation suggests.
Paint needed for a 12x14 room
| Room / surface | Surface | Coats | Paint | Paint cost |
|---|---|---|---|---|
| Walls only, 1 door, 2 windows | 365 sq ft | 2 | 3 gal | $105 |
| Walls only, but using the door and window allowances on a second door | 344 sq ft | 2 | 2 gal | $70 |
| Walls only, 3 windows | 350 sq ft | 2 | 2 gal | $70 |
| Walls only, 9-foot ceilings | 417 sq ft | 2 | 3 gal | $105 |
| Walls and ceiling, 2 coats | 533 sq ft | 2 | 4 gal | $140 |
Based on 350 sq ft per gallon, one door and two windows unless stated otherwise.
Why 2.09 gallons becomes 3
The perimeter of a 12x14 room is 52 feet. At 8-foot ceilings that is 416 square feet of wall. Subtract one door and two windows — 51 square feet — and you are painting 365 square feet.
Two coats is 730 square feet. At 350 square feet per gallon, that is 2.09 gallons. Paint is sold in gallons and quarts, so you round up to 3 gallons — or 2 gallons plus a quart, which covers 2.25 gallons and saves you money.
The practical tip: ask for 2 gallons and 1 quart rather than 3 gallons. A quart covers about 87 square feet, so 2.25 gallons gives you 787 square feet of coverage against the 730 you need. You save the price of three-quarters of a gallon and still have margin.
Can you get away with 2 gallons?
Sometimes, and it depends on three things:
- Coverage. If your paint covers 400 square feet per gallon rather than 350, two gallons gives you 800 square feet — enough for 730.
- Coats. If you are refreshing the same colour, one coat needs only 365 square feet, comfortably inside a single gallon.
- How much you stretch it. Thinning paint to make it go further ruins the finish. Do not do it.
If none of those apply, buy the extra. Running out mid-wall means a second trip and a possible colour mismatch.
Frequently asked questions
How much paint for a 12x14 room with 9-foot ceilings?
4 gallons for two coats. Taller ceilings push the requirement to about 3.2 gallons, so you round up again.
Can I buy 2 gallons and 1 quart instead of 3 gallons?
Yes, and it is usually cheaper. Two gallons and a quart covers about 787 square feet against the 730 you need for two coats.
How many square feet is a 12x14 room?
The floor is 168 square feet. The paintable wall area, after subtracting a door and two windows, is about 365 square feet.