How much Paint is Needed to Paint a Wall?

Hi, I have recently decided to paint my room wall before Diwali. I hence searched for formulas to know how much paint is needed to paint a wall. As I didn’t want to waste the paint by buying more or fall short with less paint, I figured out steps to calculate the exact amount of paint needed. I have shared with you the through steps below.

NoBroker Home Painting Service

Get premium quality painting for your home at affordable rates. Prices Starting Rs. 3500 only.

Hire Professional Painters

1-Yr Service Warranty

Check Painting Prices

How much Paint do I Need for One Wall?

I came across the below process that helped me to calculate the required quantity of paint for my space:

1. You might need a calculator and a measuring tape to get the measurements. Leave the crown moldings, baseboards and the trims as they are mostly painted with a different colour. 

2. Start measuring the height and length of the wall you choose to paint in feet, add both the numbers together and round up if necessary.

3. To know the square feet of the area, you have to multiply the total width with the height.

4. You can get the total for each window and door by subtracting 20 square feet for each door and 15 square feet for each window. Divide the total measurement by 400 to get the estimated gallons of paint you need.

How to Calculate Paint Needed for Walls?

I have shared the calculation of my space here:

• The height of 4 walls in my bedroom were 14 feet. 14+14+14+14 = 56 feet of total wall area.

• 56 [total wall area] x 14 [each wall height] = 784 [Total square feet of area]

• I multiplied 4 doors in the bedroom [1 room door, 1 washroom door and 2 wardrobe doors] with 20. Hence, 4 x 20 = 80 square feet and I then multiplied 3 windows with 15 [3 x 15 = 45] 

• I then minused the door square feet with the total square feet of area of my space first (784 - 80 = 704 sq ft) followed by the windows measurement (704 - 45 = 659 sq ft). 

• Finally, I divided the total sq ft by 400 to know the actual number of gallons of paint I need for my space;  659 / 400 = 1.6 gallons of paint.

I hope this also helps you.

Read more:

Hi, if you are trying to learn about how much paint is needed for a wall, I can help you with that. Recently, I had one of the walls of my house painted, and to know about the exact cost, I did some research on my own. During my research I learned about the below formula to calculate the amount of paint required. 

How Much Paint is Required to Paint a Wall?

I came across the below formula: 

Let me explain the whole process with the help of an example. 

Suppose that the length and breadth of the wall you are trying to paint is 12 x 12 ft. So, this would make the area of the wall

Assume that you have one door and window in the wall with dimensions (7 x 3) and (4 x 3), respectively. Then, the total area of the door and window =

Now, subtract the area of the door and window from the area of the wall, which makes it

Dividing it with a standard number 350 (1 gallon of paint per 350 square feet area) 

The amount of paint necessary to paint a wall becomes

And that’s how much paint for one wall you would need. If you are planning to paint the wall, the whole process can be a hassle. I would suggest you choose

. I also choose the same. 

Hello. One of the most fun activities that you can do is to paint a room. I did the same with my children a couple of years back when we decided to paint the living room. However, we first wanted to learn how much paint does it take to paint a room to calculate the cost. We were able to calculate the same with the help of a useful DIY guide. Let me share that with you.

NoBroker Home Painting Service

Get premium quality painting for your home at affordable rates. Prices Starting Rs. 3500 only.

Hire Professional Painters

1-Yr Service Warranty

Check Painting Prices

How Much Paint is Required to Paint a Room?

So, talking about the paint you’ll need to cover a whole room can vary based on certain parameters. I will guide you to figure out those parameters for your room. After that, it will be fairly easy for you to calculate the paint needed.

• Calculate the Area:

  The starting point is to measure the area of your room. You will need to measure the length, width and height of the room. Then, you must calculate the area of the windows and doors in the room in a similar way. Lastly, subtract the area of the windows and doors from the area of the walls to find the actual painting area.

• Find the Coverage:

  The next step is to find the coverage of your paint. In general, you will be provided with the coverage a particular paint offers. As a thumb rule, we take 130 sq. ft as the coverage per litre. 

Once you know the coverage of the paint per litre alongside the area of the room, you can do the maths to find out how much paint is needed to paint a room. 

Follow both the steps carefully to calculate a precise measure of paint usage. I hope this helps you learn how much paint is needed for a wall.

3 litres of paint can cover up to 400 square feet and it can paint a small room or a bathroom, or a kitchen. A year ago I was painting my house and I had the same confusion as yours. I thought about how much paint is needed to paint a wall. I asked the painter I hired and he was unable to give a proper answer. Well, I searched the internet and just like the painter I can tell you that you need to consider some factors to check how much paint is required to paint a wall. I will state the factors below:

• You need to know the height of the wall

• You need to know the width of the wall

• You must count the number of windows in the room

• You should also check the number of doors in your bedroom

The size of the room varies in different houses. Also, there are variations in windows and doors. Therefore there is no apt answer on how much paint is required to paint a wall. 

However, since I have searched the internet I came across a paint calculator to check out how much paint I needed to paint my wall.

I have a medium-sized living room and the size of the wall is 10 x 10 ft. After doing the calculation the app generated I required 1 gallon of paint to paint the wall.  And I needed exactly 1 gallon of paint to paint the wall. 

I hope you know now how much paint is needed to paint a wall.