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Construction Calculators

Stair Calculator

Verified formula Updated Jun 2026 Private — runs on your device

Enter details
in
in
Verified formula Private

Number of steps

16

Actual riser height
7.00

For general information only — not financial, tax, legal or medical advice. Verify before you rely on it.

How to use the Stair Calculator

The Stair Calculator works out your number of steps, along with 1 related figure in an instant. Enter total rise (floor to floor) and ideal riser height and the result updates as you type — it is free, needs no sign-up, and runs entirely in your browser so your figures stay private.

  1. Enter the total rise (floor to floor).
  2. Enter the ideal riser height.
  3. Read off your number of steps, together with actual riser height — the calculator updates automatically, with no button to press.

Worked example

For example, with total rise (floor to floor) of 112 in and ideal riser height of 7 in, the number of steps is 16.

Inputs used
Total rise (floor to floor) 112 in
Ideal riser height 7 in
Results
Number of steps 16
Actual riser height 7.00

Results are estimates for educational use, not professional advice.

Frequently asked questions

Divide the total rise by an ideal riser height and round to a whole number. A 112-inch rise with a 7-inch target gives 16 steps.

About 7 inches is comfortable for most stairs. Building codes set limits, often around 7.75 inches maximum, so check local rules.

Every step must be the same height for safety. The calculator finds the whole number of steps and the exact riser to share the rise evenly.

The rise is the vertical height of each step; the run is the horizontal depth you step on. This tool focuses on the rise.

Enter the total rise (floor to floor). Enter the ideal riser height. Read off your number of steps, together with actual riser height — the calculator updates automatically, with no button to press.

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