Stair Calculators
Choose from 42 specialized stair calculators. Each includes live SVG visualization, code compliance checking, materials estimation, and PDF export.
Step Construction
Plan step count and riser/run
Spiral
Helical staircase
Deck
Outdoor deck stairs
Winder
L & U-shape turns
L-Shaped
90° turn with landing
U-Shaped
180° turn with landing
Dbl Winder
180° winder treads
Curved
Freeform curved stairs
Floating
Cantilever treads
Switchback
Multi-flight parallel
Quarter-Turn
90° turn + platform
Half-Turn
180° parallel flights
Stringer
Stringer layout & cuts
Concrete
Volume & rebar
Steel
Weight & welding
ADA Ramp
ADA-compliant ramp
Handrail
Rails & balusters
Headroom
Clearance check
Lighting
LED strip planning
Cost
Budget estimator
ADA Stair
ADA 504/505 checks
Ship Ladder
Alternating tread
Nosing
Overhang & projection
Baluster Spacing
4" sphere rule spacing
Load/Weight
Structural load capacity
Carpet/Flooring
Material for treads
Angle/Pitch
Slope ratio & degrees
Landing Size
Landing dimensions
Rise & Run
2R+T rule optimizer
Stair Opening
Floor opening size
Garden/Exterior
Landscape stairs
Paint/Stain
Coverage estimator
Tread Depth
Effective vs actual
Stair Tread
Tread depth for stair compliance
Skirt Board
Length & angle cuts
Newel Post
Height & spacing
Timber Estimator
Board-feet of lumber
Arch
Arc, radius & span
Deck Stringer
Outdoor stringer layout
Cubic Yard
Volume conversion
Roof Pitch
Pitch, angle & factor
Land Area
Area from dimensions