Stair Calculator
Enter the information you have for stair in the Stair. The explanation below the tool helps you check the method and its limits.
Steps
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Riser and run—
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How it works
Steps = total rise ÷ ideal riser (rounded)How to use the Stair
Enter the requested values and start with one realistic example. Read the result together with its unit or label, then change one input at a time if you want to compare options.
Allow for waste, packaging, site conditions and local requirements before buying materials.
Frequently Asked Questions
What does the Stair Calculator do?
Work out the number of steps, actual riser height and total run for a staircase.
What information should I enter?
Use the input labels as a guide and enter figures from the same situation, time period and units wherever possible.
Can I use the result as an exact answer?
Treat it as an estimate or check unless the page and the rules that apply to you confirm otherwise. Rounding, fees and personal details can change the final result.