Estimate how many litres of paint a room needs.
🛠️ Free tool by the NayaPakistan team · Updated November 2026
Before buying paint, estimate how much you actually need. Enter the room dimensions, number of coats and the paint's coverage, and this tool works out the wall area and the litres required — so you don't over- or under-buy.
Wall area is 2 × (length + width) × height. Coverage varies by paint and surface, so check the tin — and deduct large doors and windows for a tighter estimate.
Work out the wall area (2 × (length + width) × height), multiply by the number of coats, and divide by the paint's coverage per litre. This tool does it for you.
Typically about 100–140 square feet per coat, depending on the paint and how porous the wall is. Check the tin and enter that figure.
For a tighter estimate, yes — subtract large openings from the wall area. For a quick estimate the extra paint is a useful buffer.