Stair rise and going
A geometry check. Not Building Regulations approval.
Method
Worked case: 180 mm rise, 250 mm going is 35.8° and 2R+G = 610 mm.
Approved Document K has its own limits. This page only reports the geometry.
Logic: how this figure is built.
Last checked 2 October 2026. See the common-calculations note and the disclaimer.