Stair geometry without guesswork

Check the stairs before ordering or building them

Choose riser count, going, pitch and run. Then check layout, headroom, materials and compare options.

Tools for the whole process

From the first height split to a contractor-ready report.

Choose riser count, rise, going, pitch and total run.

Compare the best integer riser counts for one floor height.

Split the height into two flights and check a 90° footprint.

Calculate two parallel flights, landing and stairwell width.

Check 3–5 quarter-turn winders and walking-line going.

Assess measured rise, going, pitch and the 2h+s formula.

Dimensions stay in the browser. Data is saved only when you choose.

The result separates met checks, notices and limits instead of claiming blanket compliance.

Save straight, L, U or winder options and compare them in one table.