Stair Calculator
Calculate rise, run, risers, and treads for straight stairs.
Stairs, Ramps & Access
Stair rise/run, ramp slope, and access geometry helpers.
Ramp Slope Calculator
Check ramp slope, length, and rise relationships.
Spiral Stair Helper
Estimate tread count and plan diameter inputs for spirals.
Stair Tread & Nosing Estimator
Estimate tread boards and nosing lengths for straight stairs.
Handrail Length Calculator
Estimate handrail length along stair pitch.
Stair Landing Area Calculator
Estimate landing platform area and framing needs.
Accessible Ramp Landing Helper
Estimate landing sizes for accessible ramp runs.
Stair Headroom Checker
Estimate clear headroom along a stair slope.