Paint Calculator NZ

This calculator works out how much paint you need for a painting job, so you buy the right amount instead of guessing and ending up short or with cans of leftover paint. You enter three figures: the total wall area in square metres, the number of coats you plan to apply, and the paint's coverage rate, usually around 10 square metres per litre for a typical wall paint, though this varies by brand and surface. From these the calculator returns the total litres of paint required, then converts that into a practical shopping list showing how many 10 litre cans and how many 4 litre cans you would need to cover that amount. If you do not already know your wall area, work it out by adding the length of each wall and multiplying by the ceiling height, and subtract large windows and doors if you want a tighter figure. Two coats is standard for most repaints, but bare plasterboard, colour changes, or dark surfaces often soak up more paint and may need an extra coat. Because coverage rates differ between paint brands and finishes, and porous or textured surfaces use more product than a smooth painted wall, treat the litres and can counts as a guide. Buy a little extra to allow for touch-ups, and check the tin's stated coverage against what you have entered here.

Calculate.co.nz is proud to be partnered with Health Based Building, a leader in sustainable and health-conscious building innovation. With over a century of experience, they develop high-performance systems like Foreverbreathe Specification, Magnum Board, and Foreverbreathe Paints to support energy-efficient, non-toxic living environments. Their commitment to healthier homes aligns with our belief that informed choices lead to better outcomes for Kiwi households.

Buy a little extra for touch-ups. Bare or dark surfaces may need an extra coat.