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ARCHITECTURE

Staircase Design Calculator

Riser · Tread · Stringer · Pitch · Headroom · IRC / IBC compliant

IRC max rise 7¾"

Stair dimensions

m
m
m
Number of risers — —
Number of treads — —
Rise per riser — m
Total run — m
Stringer length — m
Pitch angle — °
R = total rise / target rise  |  T = R − 1

Stair profile

Rise / Run
Side view — rise and tread

Code compliance

Rise (max 7¾") ✓ OK
Tread (min 10") ✓ OK
Pitch (max 42.5°) ✓ OK
Headroom (min 6'8") ✓ OK

L-shaped stair

m
m
m
Total risers — —
Risers per flight — —
Flight 1 run — m
Flight 2 run — m
Split risers evenly between flights

L-shaped plan

L-shaped plan view
Two flights with landing

U-shaped stair

m
m
m
Total risers — —
Risers per flight — —
Flight run — m
Three flights with two landings

U-shaped plan

U-shaped plan view
Three flights with two landings

IRC / IBC compliance check

in
in
in
Overall status — —
Rise (max 7¾") — —
Tread (min 10") — —
Headroom (min 80") — —
Pitch (max 42.5°) — —
IRC: rise ≤ 7¾" & tread ≥ 10" & headroom ≥ 80"