Painting

The amount of paint needed depends on the room size, wall height, and the number of doors and windows. Our calculator estimates this by calculating the total wall area and subtracting typical door (1.8 sqm) and window (1.5 sqm) areas. Generally, one liter of paint covers about 10 square meters.

Yes, this paint calculator is completely free to use. No registration or subscription is required. Simply enter your room measurements and get instant results.

Most interior walls require at least two coats of paint for full coverage. However, if you're painting a dark color over a light color, or vice versa, you may need three coats. Always allow proper drying time between coats (usually 2-4 hours depending on humidity).

The standard coverage rate for most interior latex paints is approximately 10 square meters per liter (or 350 square feet per gallon) for one coat. However, this can vary depending on paint quality, surface texture, and application method.

Our calculator focuses on wall area only. If you plan to paint your ceiling, calculate it separately by multiplying the room length by width, then add that to your total paint requirement. Ceilings typically use the same amount of paint as walls.