How much paint do I need for one wall? You are about to paint one or more parts of your interior, but you have no idea how much paint to buy? Before you paint the walls of a space, it is essential to calculate the number of liters of paint you will need.

Otherwise, you risk running out of product or having a surplus that you won’t know what to do with. To get it right, follow our calculations. When you decide to paint a room, there are already a lot of elements to take into account.

They include protection, choice of tint, and material. However, do not forget the most important thing: the quantity of paint to buy. Depending on the surface area of the space you want to paint, and the number of windows or doors, the amount of paint can vary.

Other factors that will affect the amount of paint include the covering power written on the pot, and the layers you will need to apply to the walls. Here’s how to determine it quickly.

## How Much Paint Do I Need For One Wall – Calculate the Surface You Will Paint

In order to be able to determine the number of liters you will need, it is essential to know the exact surface you will repaint. To do this, it’s very simple, you must first determine the perimeter of the room. To do that, you just need to measure the length and width of the walls with a meter. Then, apply the following formula: (length + width) x 2.

To obtain the surface area in m2 of the walls to paint, multiply this perimeter by the height of the room that you have previously measured using a meter. Make sure you use the the following formula: perimeter x height.

– For example, if this same room is 2.20 meters high, this will give 14 x 2.20 = 30.8 m2 of surface to paint.

To be as precise as possible, it is important to take into account the openings (doors and windows) that you do not wish to repaint. You should then deduct their surface area from the surface area of the walls. Remember to use the following formula: surface area of the walls – surface area of the openings (height x width).

– For example, if this same room has a window measuring 1.25 x 1.20 meters, this will give: 30.8 – (1.25 x 1.20) = 29.3 m2 of surface area to repaint.

### How Much Paint Do I Need For One Wall – Determining the Quantity of Paint You Require

Once you fix the surface to repaint , it is time to determine how much paint you will need. To do this, the calculation is very quick. You should use this formula: (surface to repaint / the paint yield indicated on the can or covering power) x number of layers of paint you desire.

– For example, for the same room, and imagining that the paint yield is 12 m2/liter and that you wish to apply two coats, this will give (29.3 / 12) x 2 = 4.8 liters of paint. You will need approximately 5 liters of paint to repaint the whole room, without any waste or shortage of product!

### And To Repaint The Ceiling?

To find out how much paint you need to repaint a ceiling, simply calculate its surface area (length x width). Then divide it by the yield of paint indicated on the pot and multiply it by the number of coats you want. That is: ((length x width) / yield) x number of coats.

– For example, if the ceiling of your room measures 4 x 3 meters, the paint yield is 12 m2/liter and you wish to apply 2 coats of paint, this will give ((4 x 3) / 12) x 2 = 2 liters of paint.