Calculate stair rise, tread count and horizontal length, with a downloadable profile.
Your input
Outputs are cleared when the input changes.
Result
Enter your data or use the example, then run the tool.
Worked example
2800 mm rise and 14 risers gives 200 mm per rise. Thirteen 250 mm treads span 3250 mm.
Method
Divide total rise by the number of risers, the vertical steps, to get each step height. If the upper floor forms the final tread, there is one fewer horizontal tread. Multiply tread count by tread depth for total horizontal length.
Limits
Only the geometry is calculated. The tool does not recommend safe or legal stair dimensions or approve a structure. Choose explicitly whether the top tread is separate; the angle shown spans the whole profile.
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