Construction & home

Stair Riser Height Calculator

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

Editable waste and coverage assumptionsCheck supplier specifications
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Review dimensions, coverage and waste before ordering.

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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.

Input reference and sample values

Use the units and choices shown for each field. Sample values are provided for practice, not as recommendations.

InputFormat and unitsSample
Total riseNumeric value. Unit: mm. Must be greater than zero.2800
Number of risersWhole numbers only. Minimum: 1. Maximum: 1000.16

Result for these sample inputs

175 mm

Select Try the example in the form to load these values and calculate them again. This replaces the current form inputs. Compare the result with the method and worked explanation below.

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.

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