The Cost to Paint a Room calculator estimates the cost of paint or primer needed to cover a rectangular room (blue in diagram) based on the length, width and height of the room.
INSTRUCTIONS: Choose your preferred units and enter the following: 
- (L) Length of Room
- (W) Width of Room
- (H) Height of Ceiling
- (uP) Price per Gallon
Total Cost (TC): The calculator computes the cost to paint the room in U.S. dollars, the square footage covered, and the number of gallons of paint required. Amounts with units can be automatically converted to compatible units via the pull-down menu. The calculator returns the value for the room including the ceiling and for the walls only.
| Paint Quality |
|---|
 |
| Premium |
 |
| Mid Grade |
 |
| Economy |
Paint Cost Survey Data
One should use the pricing for paint or primer that can be bought locally. However, the following prices are recent U.S. dollar costs for different price ranges of paint and primer in the United States:
- Paint Pricing Survey date: 7/29/22
- Paint Price Survey Source (online): HomeDepot
- Price of premium (high quality) paint is $61.94 USD
- Price of medium grade paint is $48.98 USD
- Price of economy paint is $26.98 USD
- Price of primer is $19.98 USD
Notes: This formula will round up on the number of gallons used for pricing if the fraction part of the number of gallons is greater than 10%. Also, this does not include the ceiling. Often ceilings are painted with different paint since they tend to have less contact with people and other things, and because ceilings make for nice accent (lighter) surfaces.
- To compute the surface area of the walls of a room, CLICK HERE.
- To compute the number of gallons to paint or prime a room, CLICK HERE.
Room Calculators
- Number of gallons to paint or primer a room.
- Cost to paint or prime a room.
- Surface area of the interior walls of a room
- Surface area of the interior walls and ceiling of a room.
- Floor area of a room
- Volume of a room
- Energy (BTUs/hr) needed to heat a room
- Insulation for a Room
- Number of Studs in a Room
- Number of drywall sheets needed for a room
- Joint Compound Needed for a Room
- Drywall Nails or Screws for a Room
- Cost of studs needed to frame a room
Paint Calculators:
- Paint for a Room: computes the number of gallons of paint or primer needed to paint an entire room, the four walls and ceiling and also for just the walls.
- Paint for a Wall: computes the number of gallons of paint or primer needed to paint a wall or any rectangular area (wall or ceiling).
- Exterior Paint for a House: computes the number of gallons of exterior paint for a gabled building like a common house.
- Cost to Paint or Primer a Room: (CLICK HERE)
- Cost to Paint a Wall: (CLICK HERE)
- Cost to paint or prime a ceiling: CLICK HERE
- Paint Pricing Survey