Free Construction Calculators & Tools/Staircase Calculator

Staircase Calculator

Design code-compliant staircases with optimal riser and tread dimensions. Calculates number of steps, angle, run length, handrail requirements, and includes visual diagrams with compliance checking.

Building Code

Select Building Code

Code Requirements:

Riser: 102-196mm
Tread: Min 254mm
Max Angle: 37°

Stair Configuration

Stair Type

Include Handrails

Calculate handrail length

Dimensions

Floor-to-Floor Height (mm)

Available Run Length (mm)

Stair Width (mm)

Preferred Tread Depth (mm)

Code Compliant

All dimensions meet IBC Residential requirements.

Risers

Treads

Angle

26.3°

Stair Profile

Stair Dimensions

Number of Risers20

Number of Treads19

Riser Height150mm

Tread Depth320mm

Total Run6080mm

Stair Angle26.3°

Comfort Formulas

Going + Rise (G+R)470mm

2R + T Formula620mm

Material Estimates

Stringer Length6780mm

Handrail Length7380mm

Concrete Volume1.473m³

Notes:

Ideal 2R+T formula range: 600-640mm for comfortable stride
G+R (Going+Rise) should be 430-450mm
Concrete volume includes 150mm waist slab thickness
Handrail length includes 300mm extensions at top and bottom

Save Your Calculation

Get a professional PDF report of this calculation, plus access to templates and additional resources.

IMPORTANT DISCLAIMER

This calculator provides PRELIMINARY ESTIMATES ONLY and is intended for planning and budgeting purposes. Results should NOT be used for final structural design or construction without verification by a licensed Professional Engineer (PE) or Chartered Engineer (CEng).

By using this tool, you acknowledge that:

1. All calculations are indicative and may not account for site-specific conditions, load combinations, or local code requirements.

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