Lay out a comfortable, safe staircase by turning a total height into evenly spaced steps. Enter the total rise, which is the vertical distance from one finished floor to the next, and the calculator divides it into a whole number of risers close to a target height you set, then reports the exact riser height and how many steps result. Add the total horizontal run to also get the tread depth per step. Most building codes cap riser height around seven and three quarter inches and want treads at least ten inches deep, and a common comfort check is that twice the riser plus the tread lands near twenty five inches. The tool flags whether your layout falls in a sensible range so you can adjust before cutting a stringer. Always confirm against your local code. Everything computes instantly in your browser with nothing sent to a server.
It divides the total rise by a comfortable riser height, then rounds to a whole number of steps and recalculates the exact riser height.
Many codes cap riser height around 7.75 inches, so the tool aims for risers within a safe, even range.
It divides the total run by the number of treads to give a tread depth, which building codes typically want at least about 10 inches.
Lay out a comfortable, safe staircase by turning a total height into evenly spaced steps. Enter the total rise, which is the vertical distance from one finished floor to the next, and the calculator divides it into a whole number of risers close to a target height you set, then reports the exact riser height and how many steps result.
Yes. Stair Stringer Calculator is completely free, with no sign-up and no usage limits.
Yes. Stair Stringer Calculator runs in any modern web browser. There is nothing to download or install.
Yes. Stair Stringer Calculator runs entirely on your device in your browser, so nothing you enter is uploaded to a server.