Paint Calculator
Estimate how much paint you need for a rectangular wall area.
How to Use the Paint Calculator
Enter wall dimensions, number of coats and paint coverage to estimate how much paint you need.
Practical Example
If the paintable wall area is 80 m², you need two coats and one liter covers 10 m², the estimate is about 16 liters.
Factors That Affect the Result
Wall texture, primer, color changes, number of coats, application method and manufacturer coverage can affect actual usage.
Frequently Asked Questions
Should I subtract doors and windows?
Subtract large openings for a tighter estimate.
Does the calculator include multiple coats?
Yes, when you enter the planned number of coats.
Should I buy extra paint?
A small reserve is useful for touch-ups.
Related Tools
Paint Quantity Planning
Estimate wall or ceiling area first, then account for the number of coats and the coverage rate printed on the paint container. Porous surfaces, dramatic color changes and textured walls may require more paint than a smooth, previously coated surface. Doors and windows can reduce the painted area, but small openings are often easier to ignore in a quick estimate. Round up to available can sizes so you have enough for touch-ups and future repairs.