// multi-utility computation suite · offline · instant · precise
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build.stair-riser-tread Calculator
Calculates tread dimensions from total rise and desired step count, verifying compliance with 7″ max rise and 11″ min run per residential building codes. The consistent riser height rule is the most commonly violated stair geometry requirement in residential construction.
Inputs
Total Rise M
Reference formula or conversion factor shown for context.
Tread Depth Mm
Vertical extent downward, or thickness of a layer. For tanks: affects pressure at the base (P = ρgh).
Stair Width M
Horizontal extent perpendicular to the length.
Results
number of risers
Sample size or count used in the calculation.
riser height (mm)
The computed height.
total going (m)
The combined total across all inputs and components.
stair angle (deg)
The computed angle in degrees or radians.
2R+T rule
Reference formula or conversion factor shown for context.
code range UK
The difference between the maximum and minimum values.