Civil engineering and structures
Stair slope angle
Calculates stair slope angle from riser height and tread depth.
Related calculators
Stair riser height
Calculates single riser height from total rise and riser count.
Roof angle from rise and run
Calculates roof pitch angle as arctangent of rise divided by run.
Roof area from plan and slope
Calculates sloped roof area from plan area and roof angle plus required material area with waste.
Roof area from plan area and angle
Converts roof plan area into approximate sloped roof area using the pitch angle.
Roof slope percent
Calculates roof slope percent from rise and horizontal run.
Blondel helper value
Helper calculation of stair geometry value 2h + s; it is not a code check or code-based design.