Finally, divide the number by the square metre per litre listed on your paint tin or in the online product information. And there you have it, you’ve worked out the amount of paint you need. P102 Keep out of reach of children.P101 If medical advice is needed, have product container or label at hand.P210 Keep away from heat, hot surfaces, sparks, open flames and other ignition sources. No smoking.P233 Keep container tightly closed.P262 Do not get in eyes, on skin, or on clothing.P312 Call a POISON CENTRE/doctor/…/if you feel unwell.P235 Keep cool.P501 Dispose of contents/container to … This is where we answer your how many coats of paint query. If you use Dulux Simply Refresh, you’ll only need to apply one coat of paint. But if you opt for a more durable finish with Dulux EasyCare Washable & Tough, multiply your number by two (the number of coats needed). That’s your paint coverage sorted. First off, you need to grab a tape measure to work out the height and width of the surface you want to paint. Then, multiply the height and width together to get your square metre measurement. Subtract any windows and doors by using the same calculation method and deducting it from the total.