How to Calculate Amount Of Paint For Exterior Of A House?

How to Calculate Amount Of Paint For Exterior Of A House?

To Calculate The Surface Area Of The Exterior Of Your House For Painting you can use the calculator below.

Estimate the exterior wall surface area: measure the entire perimeter of the home
Then measure the height from the ground to the roof line(Standard Ceiling height in Ireland is 2.6 Metres so roughly 2 times that(height 5.2 Metres) for average house height to gable-end
If you have a gable do not calculate for the gable when measuring the perimeter
Calculate the surface area of the gable end in square metres separately by measuring the width of the gable then the height multiplied these two figures together and divide by 2
Add the square metres together to get the total exterior surface area of your house.
Subtract the surface area of the garage door unless it's to be painted the same as the exterior colour
Subtract 2 square Metres for each single door
Subtract 4.2 square Metres for each double door including glass sliding doors
Subtract 4 square Metres for each large window, subtract 2 square Metres for each medium window and subtract 0.6 square Metres for each small window
This will give you a pretty good estimate of the total surface area of the exterior of your house for painting.

Calculate The Amount Of Paint Required To Paint The Exterior Of A Home

Calculate total surface area of the exterior of your house for painting(see above).
Divide the total surface area for exterior house painting by the amount of coverage per litre for the paint you are buying/using(this should be on the tin or available online). This will give you the amount of litres required to paint the exterior wall surface.

We recommend that you use the highest square Meterage recommended by the paint manufacturer to when calculating the amount of litres required to paint the exterior of the house, this will eliminate over purchasing. The exterior paint manufacturer's primary purpose is to sell you as much paint as possible.

How Many Coats Of Paint To Paint The Exterior Of A House?

To determine the number of coats your project requires:
Examine the surface area, pores, rough, textured and previously unpainted surface areas will require more paint, the same is true when there is a huge difference in colour.

How Much Exterior Trim Paint Do I Need To Paint Exterior Of A House?

As a general rule of thumb it will take one litre of exterior trim paint for every eight litres of exterior house paint(body paint), this could vary depending upon the surface area and the type of paint that's used. You will first need to calculate the amount of paint to paint the outside of the house. 

Calculate Surface Area: Exterior Of House For Painting


[CP_CALCULATED_FIELDS id="6"]

Get A Painting Quote For An External Painter & Decorator Here!...



Get House Painting Quotes

[gravityform id="1" title="false" description="false" ajax="true"]


Enjoy these helpful tips and share them with your friends! 🙂

Do you Own a painting company?

Related Home Services Information

Read More

Read More

Leave a Comment

Scroll to Top