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Calculate Stair Rise and Run

Calculate the perfect stair layout including number of steps, riser height, stringer length, and angle. Ensure your stairs meet building codes.

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1

Measure Total Rise

Measure the vertical distance from the lower floor to the top of the upper floor.

2

Set Preferences

Enter your desired riser height (usually 7.5") and tread depth (10-11").

3

Review Layout

See the calculated number of steps, exact riser height, and total run.

Building stairs requires precise calculations to ensure safety and comfort. Our Stair Calculator helps you determine the number of steps, exact riser height, and total run based on your total rise. It also calculates the stringer length and stair angle, flagging any measurements that might fall outside standard building codes.

Key Features

Step Count

Automatically calculate the optimal number of steps.

Precise Dimensions

Get exact measurements for rise, run, and stringer length.

Code Compliance

Visual indicators for standard riser heights and angles.

Frequently Asked Questions

Standard riser height is typically between 7 and 7.75 inches. Always check your local building codes.

The ideal angle for a standard staircase is between 30 and 37 degrees.

The stringer length is the hypotenuse of the right triangle formed by the total rise and total run.

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