How much paint do I need?

Area × coats divided by coverage (~10 m²/litre/coat). The calculator also adds supplies and optional labour.

Yes, surface absorbency and colour changes increase usage — add ~10%.

Paint Calculator

Calculate how much paint you need and the total cost by area, coats and price. Includes labour option. Free paint calculator.

Area to paint: 40 m²

Coats: 2 coats

Paint price: 45 €/l

I'll paint it myself (no labour cost)

414 €

Total cost

10 €/m²

Cost per m²

Paint needed	8 litres
Paint	360 €
Supplies (rollers, tape, covers)	54 €
Total	414 €

ℹ️ Estimate based on average paint coverage (~10 m²/litre/coat) and typical work speed including prep. Actual usage depends on surface absorbency, paint type and colour change. If you hire a professional, remember the household tax deduction.

The paint calculator helps you estimate how much paint a project needs and what it will cost. Enter the size of the surface you plan to paint and get a quick estimate of paint volume and total price before you head to the store.

How the calculator works and what it’s for▾

How paint coverage is calculated

Paint requirements depend on the surface area and the paint's coverage rate, meaning how many square metres one litre covers. Multiply the area by the number of coats and divide by the coverage rate to get the litres you need.

Most surfaces need two coats for an even finish, so plan for roughly double the volume of a single coat.

What the calculator shows

You get an estimate of the paint volume required and the total cost of the job. This makes it easy to see how many tins to buy and where the project lands in your budget.

Who it's for

The calculator is handy for home renovators, landlords and anyone planning to paint walls, ceilings or a facade. It helps you avoid both running out of paint mid-job and buying far too much.

Tips for a sharper estimate

Check the coverage rate printed on your chosen paint tin, as it varies by product and surface. A rough, absorbent or previously unpainted surface uses more paint than a smooth, already-treated one.

Subtract the area of doors and windows from the total if you want a more precise figure.

🔄 Reviewed June 2026