How do you calculate stair size?

Divide the overall change in level (overall rise) by 150mm.

1. 450mm / 150mm = 3.
2. 450mm / 2 = 225mm.
3. Twice the Rise plus the Going (2R + G) should be between 550mm and 700mm.
4. 2 x 150mm + 275mm = 575mm.

How do I calculate rise and run for stairs?

With a riser height of 7 1/2 inches, tread width (run) should be at least 9 inches. Ten inches is a more comfortable run; when you multiply 7 1/2 inches by 10 inches, you get 75 — within the conventional ratio of 72 to 75 inches. With 14 10-inch treads, the total run of the stair will be 140 inches.

How does stair calculator calculate stair rise and run?

The automatic calculator will design your stair stringer as close to the target height as possible, while maintaining a common step height. You can also alter the Tread Thickness [C] and Tread Depth [B] as needed. Follow the steps below to design your stair stringer:

How to calculate the height of a stair stringer?

Follow the steps below to design your stair stringer: Enter the Total Rise [A] (see diagram) Select the Target Step Height [F] (or accept the default – 7″) Select the Tread Thickness [C] (or accept the default – 1 1/2″) Select the Tread Depth [B] (or accept the default – 10 1/2″) Choose the Stringer Mount Type (Standard or Flush) Click Calculate

How to calculate the dimensions of a quarter turn staircase?

The upper floor counts as a step. Number of steps in the first flight. Number of steps at the angle. Number of steps in the second flight. Horizontal distance between two step nosings. The going must be between 230 and 330 mm (9 and 13″). Its ideal value is 280 mm (11″).

When to use nosing and Riser in stair calculator?

Both nosing and riser are discussed below. When measuring total run of a staircase, the length of the tread above the last riser is not included in the measurement. Also, when nosing is present, total run is not simply the sum of tread length, since the overhang caused by the nosing must be subtracted from the total run.