Get rise, run, stringer length and angle in seconds. TradeSet’s stairs calculator is built for job sites—no signal needed. Save results to jobs and export PDFs for clients.
This calculator is one tool inside the TradeSet app Toolbox: 18 calculators, jobs, history, and PDF export in one place.
Last updated: 18 February 2026
Metric units (mm/m) are used throughout, with Australian standards context where applicable.
Fast on-page input check using metric units for planning only.
17 risers at 172.9 mm each, total run 4000 mm, stringer approx 4.96 m.
General guidance only. Verify with plans/engineer/local requirements.
This page is one calculator from the TradeSet Toolbox. Use the app to keep calculator history, attach results to jobs, and export clean PDFs from one place.
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Right-angle and diagonal lengths for setting out. Quick and accurate for tradies.
Open toolThe stairs calculator helps carpenters, builders, and owner-builders quickly test rise/run options before cutting stringers. On Australian projects, this is most useful when you are balancing comfort, available space, and compliance checks.
Use it early when you are pricing, setting out, or reviewing design changes on site. Keeping stair geometry clear in millimetres avoids rework and helps all trades work from the same numbers.
TradeSet presents planning outputs in metric units and is intended for general guidance. Final dimensions should always be checked against approved plans and the relevant NCC/AS pathway for your project.
Each riser is 183.75 mm, total run is 3,750 mm, and estimated stringer length is about 4.77 m.
This sits in a common Australian comfort range, but always check your project documents and NCC requirements.
Many residential stairs sit around 170-190 mm rise and 240-280 mm run, but project requirements vary. Always verify against your approved design and current NCC pathway.
Stringer length is the hypotenuse from total rise and total run: sqrt(rise^2 + run^2). The calculator handles this automatically once inputs are entered consistently.
Either can work, but most stair set-out on Australian jobs is easier in millimetres. Keep one unit system through the whole calculation.
No. It is a planning tool. Final dimensions and compliance outcomes must be checked against project documentation and required authority processes.
Use these links to move from guide to calculator, then continue in the TradeSet app workflow.
Timber Stud Count Calculator
Stud spacing and count for walls. Built for carpenters and framers.
Open calculatorCheck Square Calculator
Check and set 90° with diagonal measurements. For setting out and squaring.
Open calculatorPythagoras Calculator
Right-angle and diagonal lengths for setting out. Quick and accurate for tradies.
Open calculatorCalculations are presented in metric units (mm/m) for Australian job-site use, with standards context for general guidance where applicable.
General guidance only. Verify with plans/engineer/local requirements.