Paint Calculator
Determine exactly how much paint you need for your next home improvement project. Save money by avoiding over-purchasing.
Input Dimensions
Calculation Results
How to Use the Paint Calculator
Estimating how much paint you need for a room is simple with our professional paint calculator. Start by entering the total area of the walls you plan to paint in square meters. If you're also painting the ceiling, enter that area as well to ensure a complete estimate.
Choose the number of coats you intend to apply—two coats are standard for a professional, long-lasting finish. Finally, enter the coverage rate of your chosen paint (usually found on the back of the tin) and the cost per liter. Click "Calculate Now" to get a precise estimate of the total liters needed and the projected project cost.
Pro Tips for a Professional Paint Job
Don't Forget the Primer
If you're painting a new surface or making a drastic color change, a coat of primer is essential. Factor this into your total liter count to avoid multiple trips to the store.
Surface Texture Matters
Rough or porous surfaces like new plaster or brick will absorb more paint, reducing the coverage rate. Always buy a little extra if the surface isn't perfectly smooth.
Frequently Asked Questions
How much paint do I need for a 4x4 meter room?
For a standard room with 4x4m walls (approx. 40m² of wall area) and two coats, you would need roughly 8-10 liters of paint, depending on the specific coverage rate of the brand you choose.
Is one coat of paint ever enough?
While some high-opacity paints claim one-coat coverage, two coats are almost always better for durability, color depth, and achieving a professional, consistent finish.
How do I calculate the area of a wall with windows and doors?
Calculate the total wall area first (height × width), then subtract the area of the windows and doors to get the net area that requires paint. This ensures your estimate is as accurate as possible.