HOW IT IS CALCULATED
Calculate rafter length
Use horizontal run and rise as the two perpendicular sides of a right triangle.
Instant resultClear formulaRuns locally
01Values
02√(run² + rise²)
03Result
4 m run and 2 m rise → about 4.47 m
This is the Pythagorean theorem
The rafter is the hypotenuse formed by horizontal run and vertical rise.
02
In short
What logic does the calculator use?
√(run² + rise²)
Example?
4 m run and 2 m rise → about 4.47 m