How Much Paint Do I Need? Calculate Coverage with Our 1 Litre Paint Calculator for Square Metres


When embarking on a painting project, one of the most critical questions is, “How much paint do I need?” Accurately estimating paint coverage ensures you buy the right amount of paint, saving both time and money. With our 1 litre paint calculator, you can easily determine how many square metres a litre of paint covers, avoiding the hassle of buying too much paint or making multiple trips to the store.

Understanding Paint Coverage

Paint coverage refers to the area that a certain amount of paint will cover. Knowing the coverage rate is essential for any painting project, as it helps you calculate how much paint is required. Various factors affect paint coverage, including the type of paint, the surface being painted, and the number of coats needed.

Factors Affecting Paint Coverage

  1. Surface Texture: Rough surfaces absorb more paint, reducing coverage.
  2. Type of Paint: Different paints, such as emulsion or oil-based, have different coverage rates.
  3. Number of Coats: Typically, two coats of paint are required for even coverage, especially if using a tinted primer.
  4. Surface Preparation: Properly primed and prepped surfaces will allow paint to cover better and more efficiently.

How to Calculate Paint Coverage with Our Paint Calculator

Our paint calculator is a handy tool that simplifies the process of determining how much paint you need. By inputting a few details about your project, you can quickly find out the volume of paint required.

Step-by-Step Guide on Using the Paint Calculator

  1. Measure the Height and Width: Measure the height and width of the walls to calculate the surface area.
  2. Input Surface Area: Enter the total surface area into the calculator.
  3. Select the Type of Paint: Choose the type of paint you’re using to get an accurate coverage rate.
  4. Calculate: Hit the calculate button to find out exactly how much paint you will need.

Read more: How Much Does It Cost to Paint a House Exterior in New Zealand?

How Much Paint Do I Need? Calculate Coverage with Our 1 Litre Paint Calculator for Square Metres

1 Litre of Paint Covers How Many Square Metres?

Understanding how much area 1 litre of paint covers is crucial for estimating the amount of paint required. On average, 1 litre of paint covers approximately 10 to 12 square metres. However, this can vary based on the factors mentioned earlier.

Factors Influencing Coverage

  1. Surface Texture: Smooth surfaces cover more area per litre compared to rough surfaces.
  2. Type of Paint: Some paints, like enamel paint, may have a different coverage rate.
  3. Number of Coats: More coats mean less coverage per litre.

Read more: How Much Does Roof Painting Cost in Wellington NZ? 2024 Average Prices by Wellington Decorators

Calculating Paint for Different Surface Areas

Calculating the amount of paint needed for various surface areas is straightforward with our paint calculator. Here are some example calculations for different room sizes:

Example Calculations

  1. Master Bedroom: A master bedroom with a surface area of 50 square metres will require approximately 5 litres of paint for one coat.
  2. Living Room: For a living room with a surface area of 70 square metres, you will need around 7 litres of paint for one coat.

Tips for Accurate Paint Calculation

Ensuring accurate paint calculation is vital to avoid buying too much or too little paint. Here are some tips and tricks:

Tips and Tricks

  1. Measure Accurately: Always double-check your measurements to ensure accuracy.
  2. Consider Windows and Doors: Subtract the area of windows and doors from the total surface area.
  3. Use a Primer: Applying a primer can improve paint coverage and reduce the amount of paint needed.

How Professional Painters Calculate Paint Coverage

Professional painters have their own methods and tips for calculating paint coverage. They often account for factors such as the type of paint and the condition of the surface being painted.

Professional Tips

  1. Use Quality Paint: High-quality paint often provides better coverage, saving you paint and time.
  2. Proper Preparation: Ensure the surface is clean and primed for the best results.
  3. Multiple Coats: Professionals typically apply two coats for an even finish.

Using Dulux Paint Calculator for Best Results

The Dulux paint calculator is a reliable tool for determining paint coverage. It provides accurate estimates based on the type of paint and surface area.

How to Use the Dulux Paint Calculator

  1. Input Dimensions: Enter the dimensions of the area you want to paint.
  2. Select Paint Type: Choose the specific Dulux paint product.
  3. Calculate: The calculator will provide an estimate of the paint required.

How Much Paint Do I Need? Calculate Coverage with Our 1 Litre Paint Calculator for Square Metres

FAQs About Paint Coverage and Calculation

Here are some frequently asked questions about paint coverage and calculation:

Common Questions

  1. How many litres of paint do I need for a 20 square metre room?
    • You will need approximately 2 litres of paint for one coat.
  2. Does the type of paint affect coverage?
    • Yes, different types of paint have different coverage rates.
  3. How can I ensure even coverage?
    • Apply multiple coats and use a primer for the best results.


Accurately estimating paint coverage is crucial for any painting project. By using our 1 litre paint calculator, you can easily determine how much paint you need, ensuring a smooth and efficient painting process. Don’t forget to consider the factors affecting coverage and follow the tips for accurate calculation.