Stair Calculator: FramingOne number answers the whole puzzle
Measure the total rise with a tape, type it in, and the app splits it into even risers, pairs each with a comfortable tread, and draws the whole staircase as a dimensioned side profile.
Riser, tread, stringer cuts
Stair Calculator: Framing
One measured height in. A dimensioned staircase, a cut list, out.
Download on the App Store蹴上げ R
180mm
踏み面 T
265mm
2R+T
625mm
Screenshots
Features
Compare step counts side by side
See n-1, n and n+1 steps at once, each with its own riser, tread, slope and the classic 2R+T comfort rule, so you can see which option actually walks best before you commit.
A cut list in plain carpentry terms
Stringer notches, tread boards and riser boards, all in one list you can take straight to the lumber yard or the saw. No translating a diagram into a shopping list yourself.
Millimeters or feet and inches
Work in mm, cm, or feet-and-inches with proper sixteenth-inch fractions. Switch units any time and the same plan redraws itself instantly.
Save every staircase you plan
The deck steps, the shed platform, the basement stair — keep them all in one list and reopen any of them to pick up exactly where you left off.
An honest tool, not a code checker
Comfort ranges are editable defaults, not building law. Stair codes differ by region, so the app tells you to check yours before you cut — it never claims to certify anything as safe or legal.
No account, no subscription, no network
One purchase and everything is on your device, forever. The app makes no network requests of any kind and asks for no permissions at all — no camera, no location, nothing.
Built for the one job it does
Straight stairs only, worked out in under a minute. No 3D modeling, no learning a calculator's button layout — just a measured height in and a buildable answer out.
Every set of DIY stairs starts with the same puzzle: one total height,
and the question of how many steps should divide it.
StairStepScan answers it on the spot. Measure the rise with a tape,
type it in, and the app splits it into even risers, pairs them with
a comfortable tread, and draws the whole staircase as a dimensioned
side profile you can build from.
PLAN
- Riser and tread worked out from one measured height
- Compare step counts side by side, with the classic 2R+T comfort
rule showing which option walks best
- Slope angle and stringer length, drawn right on the diagram
BUILD
- A cut list in plain carpentry terms: stringer notches, tread
boards, riser boards
- Millimeters or feet-and-inches with proper fractions
- Save every staircase — the deck steps, the shed, the basement
HONEST TOOL
- Comfort ranges are editable defaults, not building law. Stair codes
differ by region, and the app tells you to check yours before you cut.
No account, no subscription. One purchase, on your device, forever.