Stair Riser Calculator

STAIRS v1.0

IRC-standard comfortable riser height is 7 in - 7.75 in (7.75 in is the US residential code maximum). Number of risers = round(total rise / target riser).

Civil & Structural Engineering Tools

Inputs

Results

Number of Risers
14 risers
Actual Riser Height:7.714 in

IRC-standard comfortable riser height is 7 in - 7.75 in (7.75 in is the US residential code maximum). Number of risers = round(total rise / target riser).

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단계별 가이드

1

Enter Total Rise

Input the total vertical rise of the stairway in inches (floor to floor).

2

Set Target Riser Height

Keep the 7.5 in default (within the 7-7.75 in IRC comfort range) or adjust.

3

Check Actual Riser Height

View the number of risers and the resulting actual riser height, flagged against the 7.75 in code maximum.

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자주 묻는 질문 (10)

이 도구에 관해 자주 묻는 질문과 답변입니다.

The IRC (International Residential Code) sets a maximum riser height of 7.75 inches for most residential stairs.
Uneven riser heights are a leading cause of stair trip-and-fall accidents; code requires the greatest riser variation within a flight not exceed 3/8 inch.
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