Paint Coverage Calculator
How the Paint Coverage Calculator Works

The Paint Coverage Calculator is a handy tool designed to estimate the amount of paint required to cover a specific area. Whether you’re painting a room, an exterior wall, or a piece of furniture, this tool simplifies the process by factoring in the total area and the paint coverage per gallon or liter.
How Paint Coverage is Calculated
The formula to calculate the amount of paint needed is:
Paint Needed = Total Area ÷ Coverage per Unit
Components of the Formula:
- Total Area: The area to be painted, measured in square feet or square meters.
- Coverage per Unit: The amount of area a gallon or liter of paint can cover, usually provided on the paint container.
- Paint Needed: The quantity of paint required, expressed in gallons or liters.
Steps to Use the Calculator:
- Measure the height and width of the walls or surfaces to be painted.
- Input the total area into the calculator.
- Enter the coverage per gallon/liter, which is typically listed on the paint can.
- Divide the total area by the coverage per unit to calculate the required paint quantity.
Applications of Paint Coverage Calculation
The Paint Coverage Calculator is useful for:
- Estimating paint costs for home improvement projects.
- Avoiding paint wastage by calculating exact requirements.
- Planning professional or DIY painting projects efficiently.
- Comparing different brands of paint based on coverage and cost.
10 Examples for Teachers
Here are 10 simple examples to explain paint coverage calculations:
Example 1: Single Wall
Total Area: 120 square feet
Coverage per Gallon: 400 square feet
Solution: Paint Needed = 120 ÷ 400 = 0.3 gallons
Example 2: Room with Four Walls
Total Area: 600 square feet
Coverage per Gallon: 350 square feet
Solution: Paint Needed = 600 ÷ 350 = 1.71 gallons
Example 3: Small Fence
Total Area: 50 square feet
Coverage per Gallon: 300 square feet
Solution: Paint Needed = 50 ÷ 300 = 0.17 gallons
Example 4: Ceiling
Total Area: 200 square feet
Coverage per Gallon: 400 square feet
Solution: Paint Needed = 200 ÷ 400 = 0.5 gallons
Example 5: Large Exterior Wall
Total Area: 800 square feet
Coverage per Gallon: 250 square feet
Solution: Paint Needed = 800 ÷ 250 = 3.2 gallons
Example 6: Bedroom
Total Area: 400 square feet
Coverage per Gallon: 350 square feet
Solution: Paint Needed = 400 ÷ 350 = 1.14 gallons
Example 7: Kitchen
Total Area: 300 square feet
Coverage per Gallon: 400 square feet
Solution: Paint Needed = 300 ÷ 400 = 0.75 gallons
Example 8: Hallway
Total Area: 150 square feet
Coverage per Gallon: 300 square feet
Solution: Paint Needed = 150 ÷ 300 = 0.5 gallons
Example 9: Large Fence
Total Area: 600 square feet
Coverage per Gallon: 400 square feet
Solution: Paint Needed = 600 ÷ 400 = 1.5 gallons
Example 10: Garage
Total Area: 500 square feet
Coverage per Gallon: 350 square feet
Solution: Paint Needed = 500 ÷ 350 = 1.43 gallons