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Staircase Calculator
Design a comfortable staircase with the right number of steps.
Steps = ceil(total rise / riser height). Stringer length = sqrt(run² + rise²) where run = steps × tread. Ideal risers are 17–18 cm, treads 26–30 cm.
How it works
Steps = ceil(total rise / riser height). Stringer length = sqrt(run² + rise²) where run = steps × tread. Ideal risers are 17–18 cm, treads 26–30 cm.
Worked example
A 2.8 m rise with 18 cm risers = 16 steps. With 28 cm treads, the stringer ≈ 5.4 m.
Recommendations
- Keep risers 17–18 cm and treads 26–30 cm
- Maintain a constant riser height across the flight
- Leave at least 2 m of headroom above each step
Tips & advice
- Riser + tread should total about 45 cm (comfort rule)
- Landings every 12–15 steps reduce fatigue
- Add a handrail at 90–100 cm height
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Staircase Calculator
Design a comfortable staircase with the right number of steps.
Use the calculatorInvoice Generator FAQs
Yes, all 20 home calculators are 100% free, private and run entirely in your browser. No account needed.
They use standard industry formulas. Always round up for materials and confirm with a professional for structural work.
The calculators use metric units (meters, liters, m³). Convert imperial measurements beforehand if needed.
No. Calculations happen instantly in your browser and nothing is sent to any server.
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