Staircase Calculator

Calculate number of steps, riser height, total run & stringer length. Validates comfort using the Blondel formula (2R+T).

Staircase Details
Enter floor height, riser & tread dimensions
Step Details
18 steps

18 risers × 17 treads

Actual Riser167 mm
Tread Depth275 mm
Total Run (horizontal)4.67 m
Total Going (with landing)5.67 m
Stringer Length5.55 m
Slope Angle31.2°

Blondel Comfort: 2R + T = 608 mm

✓ Within comfortable range (580–660 mm). Good ergonomic design.

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Based on IS 456, NBC India guidelines. Residential riser: 150–190 mm, tread: 250–300 mm. Commercial riser max 150 mm.