How Much Paint for a 10x10 Room?
The short answer: 2 gallons for two coats — or 1 gallon if you are refreshing the same colour.
A 10x10 room with 8-foot ceilings needs 2 gallons of paint for two coats. The exact requirement is only 1.6 gallons, but paint is sold in whole gallons, so you buy 2. If you are recoating the same colour in good condition, a single gallon is enough.
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 10x10 room
| Room / surface | Surface | Coats | Paint | Paint cost |
|---|---|---|---|---|
| Walls only, 1 door, 1 window | 284 sq ft | 2 | 2 gal | $70 |
| Walls only, 1 coat | 284 sq ft | 1 | 1 gal | $35 |
| Walls only, 3 coats | 284 sq ft | 3 | 3 gal | $105 |
| Walls and ceiling, 2 coats | 384 sq ft | 2 | 3 gal | $105 |
| Walls only, 9-foot ceilings | 324 sq ft | 2 | 2 gal | $70 |
Based on 350 sq ft per gallon, one door and one window unless stated otherwise.
The maths for a 10x10 room
The perimeter is 40 feet. At 8-foot ceilings that is 320 square feet of wall. Subtract one door and one window — 36 square feet — and you are painting 284 square feet.
Two coats is 568 square feet. Divided by 350 square feet per gallon, that is 1.63 gallons, which rounds up to 2 gallons.
The awkward truth about small rooms
A 10x10 room is the classic case where you pay for paint you will not use. You need 1.63 gallons and you must buy 2. That half-gallon is not wasted — keep it.
It is the exact paint you will need for touch-ups after furniture moves, and it is the only paint that will match, because it carries the same tint code. Store it upside down in a cool place and it will keep for years.
If you are painting a 10x10 room and a 12x12 room at the same time, buy 4 gallons in one batch rather than 2 and 2. Paint tinted in separate batches can differ just enough to notice where two rooms meet.
What it costs
At $35 per gallon, expect about $70 in paint, roughly $49 for primer if you need 2 gallons, and about $30 for rollers, brushes, tape and drop cloths. A realistic self-painting budget for a 10x10 room is $100 to $140.
Frequently asked questions
Is 1 gallon enough for a 10x10 room?
For one coat, yes comfortably — 1 gallon covers 350 square feet and the room has 284 square feet of wall. For the usual two coats you need 2 gallons.
How much paint for a 10x10 room with 9-foot ceilings?
Still 2 gallons for two coats. Taller ceilings add about 35 square feet of wall, taking the requirement to roughly 1.8 gallons, which still rounds up to 2.
Is a 10x10 room small enough for a single gallon?
Only if you are refreshing the same colour over a sound, previously painted surface. Any colour change needs two coats.