Paint Coverage Calculator for Large Open-Plan Area (3 Coats)
Determine paint quantity for a large open-plan space with 150 square meters of wall area and three coats for better coverage.
Estimates the total liters of paint required based on wall area, number of coats, and paint coverage per liter. Enter your Total Wall Area, Number of Coats, Paint Coverage per Liter to get an instant paint required. Formula: (total_wall_area * number_of_coats) / paint_coverage_per_liter.
Paint Required
Fill in the fields above and click Calculate
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How It Works
How It Works
This calculator estimates how much paint you need based on the size of your project. It multiplies the total wall area by the number of coats you plan to apply.
Then, it divides that total painted area by how much area one liter of paint can cover. The result tells you how many liters of paint are required.
- Multiply total wall area by number of coats
- This gives the total surface area to be painted
- Divide by the coverage per liter
- The result is the total liters of paint needed
Understanding the Results
The result shows the total amount of paint required in liters. This helps you plan your purchase and avoid running out of paint during the job.
If the result includes a decimal, it’s usually a good idea to round up slightly to ensure full coverage.
- The output is measured in liters
- Higher wall area increases paint needed
- More coats mean more paint required
- Lower coverage per liter increases total paint needed
Frequently Asked Questions
How do I calculate how much paint I need?
To calculate the required paint, multiply the total wall area by the number of coats and then divide by the paint coverage per liter. The formula used is: (Total Wall Area × Number of Coats) ÷ Paint Coverage per Liter. The result gives you the total liters of paint needed for your project.
What does 'Paint Coverage per Liter' mean?
Paint coverage per liter refers to how many square meters one liter of paint can cover. This information is usually provided on the paint can label. For example, if a paint covers 10 square meters per liter, one liter will cover 10 m² for a single coat.
Should I include multiple coats in my calculation?
Yes, you should include the total number of coats you plan to apply. Each additional coat requires the same amount of paint as the first coat. For example, if you are applying two coats, simply enter 2 in the Number of Coats field.
Do I need to subtract doors and windows from the total wall area?
For more accurate results, you can subtract the area of doors and windows from the total wall area before entering the value. However, many people leave them included to account for touch-ups and minor surface variations. This helps prevent running short on paint.
What units should I use for the wall area?
All measurements should be in square meters for accurate results. If your measurements are in a different unit, such as square feet, convert them to square meters before using the calculator. Consistent units ensure the formula works correctly.
Should I buy exactly the amount shown in the result?
It is generally recommended to purchase slightly more paint than the calculated amount. Small variations in surface texture, absorption, and application method can affect coverage. Rounding up ensures you have enough paint to complete the project without interruption.