The stair calculator calculates stair rise and run, stair angle, stringer length, step height, tread depth, and the number of steps required for a given run of stairs.

This stair calculator computes stair parameters such as rise, total run, angle, and stringer length based on the height, run, tread, and headroom requirements.

Tired of making multiple trips to the store? Use our stair and step calculator and get your total stinger length, riser dimensions, and more with Decks.com.

Jul 31, 2025 · Use our Stringer Length Calculator to quickly determine the correct length of a stair stringer. Includes formulas, example, and step-by-step explanation for accurate stair construction.

Calculate the length of a stringer from the total rise, the number of risers and known run of one tread. To see the number of risers, divide the total rise by a riser height that works for you. For instance, …

Free stair stringer calculator. Enter total rise, tread depth, and target riser to get exact riser count, tread count, stringer length, and stair angle.

Use our online stair calculator to work out stair parameters such as rise, run, angle and stringer length for your next home improvement project.