Always round up to ensure that you have enough paint to complete the job.
How much paint do I need?
Let's start with calculating how much paint you'll need to paint your house. It's pretty easy really, complete these simple formulas and you're there.
Step One: The Perimeter
Measure the perimeter of your house (length and width, in metres). If your house is not rectangular shaped, work your way around measuring each section. Add all numbers together.
Length + Length + Width + Width = Total Perimeter (m)
Step Two: The Height
Multiply the perimeter by height of the house (up to the eaves).
Total Perimeter x Height = Gross Area (m²)
Step Three: Doors & Windows
Deduct windows and doors. An average window is approximately 1.5 m² and an average door is 2.5m².
Gross Area(m²) - Doors & Windows (m²) = Total Area (m²)
Step Four: Paint Loss Compensation
To compensate for paint loss, divide Total area by 14
Total Area(m²) / 14 = Number of Litres required per coat
Download a PDF of our DIY Exterior Painting Guide