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  2. Home & Construction
  3. Stair Calculator

Stair Calculator

Calculate staircase rise and run parameters.

Loading stair layout models...

How to Use the Stair Calculator

  • 1Enter total rise height.
  • 2Enter target riser and tread depth.
  • 3See layout dimensions.

Calculation Formula & Mathematical Definition

Stringer Length = sqrt(Rise^2 + Run^2).

Step-by-Step Worked Example

A 100-inch total rise with 7.5-inch target risers requires 13 risers at 7.69 inches.

Frequently Asked Questions

How do I use the Stair Calculator?

Enter your values into the input fields and the calculator will compute the result automatically and display it below.

Are the results from the Stair Calculator accurate?

Yes, results are based on standard formulas. They are estimates only and should be verified with a qualified professional for official purposes.

Was this calculator helpful?

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Estimate Only

Calculations on this website are automatic estimates and do not represent guaranteed financial, tax, or legal returns. Please verify details with certified specialists.