Understanding your calculation
Method, example and limitations
How the calculation works
Rectangular area is length multiplied by width. Calculate each section separately for irregular rooms, then add or subtract areas as appropriate.
Example to check
A rectangular floor 12 ft long and 10 ft wide covers 120 ft² before waste or excluded areas.
Before using the result
Use square units and distinguish floor area from volume. Materials often need additional allowance for cuts, breakage or layout.