Staircase Rise & Run Calculator

Calculate riser height, tread depth, number of steps, and stair angle.

Total Rise / Floor-to-Floor Height (mm)

Preferred Riser Height (mm)

Standard staircase dimensions

Most building codes require riser height 150â€“200 mm and tread depth 250â€“320 mm. The classic formula: 2R + T = 700 mm (R = riser, T = tread).