We answer the question: how much paint do I need? with our guide on how to calculate paint quantities. Working out your requirements for paint allows you to keep costs down and it ensures continuity of colour. Take a look at our step-by-step instructions for working out how much paint you need...
First, you will need to measure each wall you wish to paint.
We advise using a metal tape measure for accuracy. Start by measuring the width and height in metres, then multiply each wall's width by its height.
Example: Wall size: Height: 1.2m x Width: 2.4m = 2.88 square metres.
Take all the results from each wall you wish to paint and add them together. This will calculate the overall square metre measurement.
If you have large spaces that aren’t being painted, you should subtract this from your current total. This includes windows, doors and/or fireplaces.
Use the same calculation method as above to work out the total area. Then subtract it from your previous overall total.
Example: Window size: Width: 0.35m x Height: 0.60m = 0.21 metres.
Wall total: 2.88m – 0.21m = 2.67 square metres.
Multiply your new total square metre measurement by the number of coats you’ll need. We recommend applying at least two coats and it's also worth including a little extra paint for touch-ups.
Example: Two coats x 2.67m = 5.34 square metres.
Finally, divide this total figure by the m² / L number on your paint tin. This will give you the total litres of paint you need for your project.
Now you know how to calculate paint quantity for any room!
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Calculated your paint quantities? Chosen your colours? Grab your paintbrush and take a look at our simple guide to painting a room. We cover everything you need to produce results you'll be proud of!
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