Classic stair calculator help you to calculate your stairs fast, precise and with no limitation for how many steps do you want to have. All you have to do is to put your desired measurements in app and press calculate button, and your result pop-up instantly and ready to be used for building your stairs plan.
Mostly ideal for professional or occasional constructions, builders, engineers or handymen. Making life easier for everyone involved in any stair project.

Input both IMPERIAL and METRIC units, and calculate using inch fractions.

Ideal for calculate and build concrete stairs, wood stairs, iron stairs, straight stairs or with turn to 90 degree and 180 degree.

You can calculate:
- Simple stairs
- Semicircular stairs
- Stairs on stringer
- Stairs on bowstring
- Stairs on 90 degrees turn - stairs L shape
- Stairs on 180 degrees turn - stairs U shape
- Spiral stairs
- Helical stairs

Using classic stair calculator you can find treads depth, rise height, number of steps and angle fast and easy.