How to calculate the amount of paints required to cover the walls

You can save time and money by pre-selecting the size of paint you need before buying. This will ensure you don’t run out of paint in the middle of a paint job and reduce paint waste from buying too much.

Calculate the area of ​​the rectangular room
To calculate the area of ​​​​a rectangular room with medium-sized windows and doors, do the following:

Measure length and width. Round each number to the nearest half a meter and add them together. -1
2- Multiply the sum by the height of the room, then double this result. The final figure is the area of ​​\u200b\u200byour walls in square meters.

3- From this total, subtract 1.5 square meters for each of the windows and 2 square meters for each door.

4- Ceiling area is the length multiplied by the width of the room.

Calculate the area of ​​the unusual room
If you need to calculate the area of ​​a strangely shaped room, just follow these steps:

1- First, measure the height and width of each rectangular section. Multiply these shapes to get the area, then add them together for the total area.
2- The stairs are often triangular in shape. For the area of ​​a triangle, multiply the lengths of the horizontal and vertical legs and divide by two.

How does coverage affect the total?
When you know the total area you will cover, you have half the information you need to order the paint. The rest depends on the paint’s ability to paint and the surface it should cover.

If your walls are smooth, estimate the coverage at 14-16 square feet with a liter of uncoated or semi-gloss paint. Divide your area number by this amount to arrive at the number of liters you need for the first paint. If you use the final paint on porous, rough or previously unpainted walls, a liter will cover much less. You will need more quantity for the second layer.