Do you want to repaint your living room or bedroom wall, and you do not know how to measure a room for paint? These are all lovely projects that need to be thought through beforehand.
For the best outcome, you should first identify the amount of paint you need. That is by carrying out the following calculations.
How to Measure a Room for Paint
Calculate the Number of M² to Paint
To calculate the surface area of your wall or ceiling to paint, perform the quick calculations below:
Explanations for a Wall
To evaluate the surface to paint if you wish to repaint the wall of your room, do the following. Measure the length and then the height of the wall.
Then apply this formula: length x height. For example, if the wall of your bedroom is 6 meters long and 3 meters high, the surface to paint will be: 6 x 3 = 18m².
Do not forget to take into account the surface area of the doors and windows. That is because you need to be as precise as possible in estimating the volume of your room.
For example, if you have a standard size window 1m wide and 1.20m high, you should know the following. The total surface area of your room to paint will be : 18 – (1+1.20) = 16.8m².
Explanations for a Ceiling
The formula is different if you want to calculate the surface area of your ceiling. You will have to measure the length and width of your room on the floor for ease of use.
Calculate the Amount of Paint You Require
Generally speaking, a 1L pot will be enough to paint the woodwork of a standard room (two doors and a window). On the other hand, 3L will cover the needs for a room of about 10 m² on the floor, per coat. Of course, this depends on a number of factors.
They include the number of openings in your room, and the surface on which you are painting. Another factor to consider is the the performance of the product you choose. To calculate a precise quantity, follow our advice below.
Quickly calculate your paint quantity using this formula. The formula is (surface area in m² / yield in m² per L) x number of coats = quantity.
Example: (surface area in m² / yield in m² per L) x number of coats = quantity: (20m² / 10m²) x 2 = 4 liters.
You will find the “yield” of the paint, which corresponds to the covering power, on the paint pot or on online product sheets. For example, we take our universal paint, printing and finishing, Cross, which has a yield of 10m²/L/coat. Then, the calculation will be: 20m² / 10 = 2L.
It is important to remember to multiply the surface you will paint by the number of coats you wish to apply in order to have enough paint. This depends largely on the original state of your wall, the color you choose and the opacity of the paint you will use.
To apply two coats, multiply the volume by 2, for example, 2L x 2 = 4L.
You will then need 4L of paint to cover your entire wall in two coats. Depending on the packaging available for paint you choose, round up.
Conclusion – How to Measure a Room for Paint
Remember to apply an undercoat if your wall has never been painted, and do the same calculation to estimate the quantity.