Stair Rise & Run

Set out a straight, single-flight stair against selected NCC geometry limits.

Finished total rise (mm)Measure vertically from finished lower floor to finished upper floor.Maximum available run (mm, optional)Horizontal space from the first riser to the upper floor edge.

Stair use

NCC 2022 Housing Provisions 11.2.2 and Volume One D3D14. This calculator covers straight stair geometry only.

The top floor is the final step, so a flight has one fewer going than risers. Tread depth and nosing details are separate from the measured going.

Geometry passes selected limits

This arrangement satisfies the selected riser, going, 2R + G and single-flight riser-count checks.

Risers: 16
Each riser (R): 175 mm
Goings: 15
Each going (G): 280 mm
Total run: 4,200 mm
2R + G: 630 mm
Stair angle: 32°
Run remaining: Not limited

Selected geometry limits

Check	Minimum	Maximum
Riser (R)	115 mm	190 mm
Going (G)	240 mm	355 mm
2R + G	550 mm	700 mm
Risers per flight	2	18

Confirm the complete stair design

This is a preliminary geometry check, not a compliance certificate. Confirm the current NCC edition, state variations, applicable Australian Standards including AS 1657 where required, landings, loads, headroom, width, handrails, barriers, nosings, slip resistance, approved drawings and project specifications before construction.