Use Paint Calc to easily estimate the amount of paint you'll need for your decorating projects. Choose metric or imperial measurements. 1 - Input the coverage information for the paint you're using and the coats expected. 2 - Input the the wall measurements. 3 - Input door or window measurements youre not going to paint. Click Calculate and the app will estimate how much paint youll need. You will need the paint coverage information to get accurate results. This can usually be obtained from the supplier or the paint container. Please always use the result as an estimate and check with your supplier before you buy. Upgrade to Paint Calc Pro to remove ads if you prefer a distraction free app.