Work out step rise, run and stringer length for stairs.
Dividing total rise by a comfortable per-step rise gives the step count, then rises evenly divide the total. The stringer length is the hypotenuse spanning total rise and total run. Stairs need consistent rise and run so each step feels identical, and the stringer must be cut to the true diagonal length.
Stair Rise & Run
Steps = total rise / target rise; stringer = sqrt(rise^2 + run^2)
Steps = total rise / target rise; stringer = sqrt(rise^2 + run^2) Dividing total rise by a comfortable per-step rise gives the step count, then rises evenly divide the total. The stringer length is the hypotenuse spanning total rise and total run.
Stairs need consistent rise and run so each step feels identical, and the stringer must be cut to the true diagonal length.
This calculator takes 3 inputs: Total rise, Target rise per step, Run per step. The pre-filled defaults are a realistic starting point — replace them with figures from your own environment for a result you can act on.