Step-by-step instructions
- Enter or select Waste area.
- Enter or select Roof area.
- Tap Calculate.
- Review the result shown directly below the calculator.
Roofing Waste Percentage Calculator
Calculate roofing waste from waste area and roof area.
How to use the Roofing Waste Percentage Calculator
Calculate roofing waste from waste area and roof area.
What the inputs mean
- Waste area
- Enter the value requested by this field label.
- Roof area
- Enter the value requested by this field label.
Formula or calculation method
Waste area is divided by Roof area and the result is multiplied by 100 to express the relationship as a percentage.
Example
For example, if Waste area is 25 and Roof area is 100, the calculated result is 25%.
How to understand the result
The result is a percentage. A higher or lower percentage has different meaning depending on the calculator, so compare it with the goal, limit, benchmark, or historical value relevant to your situation.
Tip: Keep all values in compatible units and use values from the same time period when the calculator compares two amounts.