Finally, you decided to bite the bullet and start your very first DIY painting project for your home. You’ve read up on how to prepare the tools, prepare the work area and surface, how to choose the paint color, what kind of finish you want, and where to go to buy it. But how do you estimate the amount of paint you would need?

There are three ways you can do that.

Boysen Paint Calculator

1.   Boysen App

How Do You Estimate the Amount of Paint You Would Need?

If you’re a digital native, you could always use the Boysen App to calculate for you. Click this link to find out the step-by-step instructions on the download and use of the app.

2.   Paint Calculator

A second option would be to use the paint calculator available in the Boysen website. 

How Do You Estimate the Amount of Paint You Would Need?

What’s great about the first two methods is that the paint calculator will give you the paint system that you will be using. 

It will ask you the following:

– the kind of surface you will be painting
– the surface type, i.e. whether it’s interior or exterior walls, and whether it’s plain or texture
– the surface condition, whether it’s new painting or repainting
– the paint type, or the different Boysen paint brands
– the sqm area of the wall

You will not only be given the number of liters of paint that you will need but you will also get the other products that come with the paint system such as putty, neutralizer and primer. 

3.   The Manual Way

If you want to check your paint calculations, you can use the manual way, using the mano-mano formula:

((height x width) / coverage)) x number of coats

Sample Calculation of a Wall

Let’s say your ceiling height is 5 meters and the width of the wall is 10 meters. if you want to use Boysen Permacoat Latex to paint your concrete wall, you will see from the product description that the product coverage is 25 square meters. Assume further that you will paint 2 coats. 

((5 meters x 10 meters) / 25 square meters)) x 2 coats
= (50 / 25) gallons x 2 coats
= 2 gallons x 2 coats
= 4 gallons

This means that for one coat, you would need 2 gallons/coat. But if you want to make two coats, then you would be needing 4 gallons for the whole DIY project. 

Since 1 gallon = 4 liters, you will be needing 16 liters to complete your project, 

4 gallons x 4 liters = 16 liters

The Boysen paint packaging available are 1-liter, 4-liter and 16-liter cans. It is best to buy all the paint you need for a room before you start your DIY project. This is to make sure that the paint color is consistent for the whole area you’re working on!

You may also find this post helpful so do click on the link.

If you have any questions about using the formula, you can have your calculations checked in a Mix & Match Station in a home depot close to you before you buy your paint. Or if you want to communicate directly with our Technical team, please email your question to You can also call  (02) 363-9738 local 417 to 418, or text 0918-913-6000. Our Technical Service Department is open from 8:00 am to 5:00 pm Monday to Saturday.

Annie H Adlawan

Annie is the Managing Editor of Let it B | MyBoysen Blog. An unrepentant workaholic, she runs this blog and her own company Talking Lions ( She thrives on collaborating with people who are good at what they do, and working together with them to create something special. Annie learned interior styling while managing her own wholesale business in the Netherlands, importing high-end, handmade home furnishings to stock four outlets and one showroom around the country.


  1. Avatar

    Dear Sir/Madam,

    Are the different colors available in your store, I mean the mix & match? Can you give me the prices of each of the following items per can
    B701 White
    B702 Off White
    B721 Cream
    B723 Moonlight
    B725 Bone Ivory
    B771 Tile Red
    B780 Chocolate Brown and the colorants BOYSEN® Latex Colors for tinting to achieve pastel shades and their sizes. Where is your nearest store where I can buy for your products because I am now preparing for the estimates of our office building this week and probably after a week or two weeks I will start buying those painting materials.

    I would appreciate it if you can send me the prices and available sizes as soon as possible.

    Thank you and have a nice day.


    • Annie H Adlawan

      Thank you for your comment and for following us at Let it B.

      For the list of products that you’ll be using, these are all standard colors under BOYSEN Permacoat Flat Latex. Meaning, you can buy them off the shelf with color – no need to have them mixed at our Mix and Match Stations.

      For the price, unfortunately, we do not engage in direct selling transactions. May we know your location so that we can give the details of the dealers near or within the area?

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