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Construction & home

Stair Riser Height Calculator

Divide total vertical rise into an integer number of equal risers.

Editable waste and coverage assumptionsCheck supplier specifications

Project measurements

Runs on your device

MATERIAL ESTIMATE

Your result

Let’s calculate.

Use the Calculate button to see your result.

Review the method below for assumptions and conventions.

How to use this tool

  1. Enter total rise, number of risers.
  2. Select Calculate to view the result.
  3. Check the method and assumptions below before using the result.

The method, explained

Riser height = total rise/number of risers.

A WORKED EXAMPLE

Using total rise = 2800 mm, number of risers = 16, the result is 175 mm. Change these example inputs to match your task; use the method above to check each step.

What to keep in mind

Check local stair requirements; this does not certify a compliant staircase. A material-quantity estimate, not a structural design or building-code check. Confirm site measurements, supplier coverage and waste before ordering.

Common questions

Which inputs does this calculation need?

Divide total vertical rise into an integer number of equal risers. Enter total rise in mm, number of risers. The filled example is editable and is not a saved personal record.

How should I interpret the result?

Check local stair requirements; this does not certify a compliant staircase. A material-quantity estimate, not a structural design or building-code check. Confirm site measurements, supplier coverage and waste before ordering.

Methodology maintained by ClarityKit. How these tools are built and checked.