Divide a total finished-floor rise into equal risers and estimate tread count and horizontal run from your design inputs.
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0.001 – 1000000000
0.001 – 1000000000
0.001 – 1000000000
Equal risers
15
Geometry only; the entered maximum is your design input, not a code recommendation. Local rules for rise, going, nosings, headroom, landings, guards and accessibility must be checked separately.
Riser count = ceil(total rise ÷ specified maximum riser).
Equal riser height = total rise ÷ riser count.
With the upper floor acting as the final landing, tread count = riser count − 1.
Risers = ceil(total rise/specified maximum riser). Equal rise = total rise/risers. Treads below the upper landing = risers − 1.
A total rise of 2,800 mm with a specified maximum riser of 190 mm needs 15 risers at about 186.67 mm. Fourteen 250 mm goings produce a 3,500 mm run.
No. The maximum riser is a user input. Local requirements for headroom, landings, guards, nosings and accessibility require separate review.
Last updated . Results are estimates for informational purposes only.