Straight stair calculator
Choose riser count, rise, going, pitch and total run.
Open toolStair planning tools
A complete set of calculators for geometry, layouts, headroom, materials and comparisons.
Step-count optimizer
Compare the best integer riser counts for one floor height.
Open toolL-shaped stairs
Split the height into two flights and check a 90° footprint.
Open toolU-shaped stairs
Calculate two parallel flights, landing and stairwell width.
Open toolWinder stairs
Check 3–5 quarter-turn winders and walking-line going.
Open toolCheck existing steps
Assess measured rise, going, pitch and the 2h+s formula.
Open toolHeadroom and floor opening
Calculate headroom at the slab edge and required opening length.
Open toolStair materials calculator
Estimate tread/riser finish, stringers, handrail and balusters.
Open toolCompare stair options
Compare your two latest saved projects in one table.
Open toolSaved projects
Manage local projects and import or export your data.
Open tool