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Stair Calculator (Rise & Run)
Calculate stair rise, run, and stringer length from floor-to-floor height. IRC code limits: max 7¾" rise, min 10" run.
LIFESTYLECalculate stair rise, run, and stringer length from floor-to-floor height. IRC code limits: max 7¾" rise, min 10" run.
Detailed instructions, formula notes, and US-context guidance shown in the calculator above.
Disclaimer: Estimate only. Consult a qualified professional for decisions with major financial, legal, or health consequences.
Stair Calculator (Rise & Run)
Compute stair rise, run, and stringer length from floor-to-floor height. IRC residential code: max 7¾" rise, min 10" run.
Number of Steps
14
Actual rise per step7.714"
Total horizontal run140.0"
Stringer length (approx)176.8"
IRC code compliance✓ OK
IRC R311 also requires: max 4⅜" variation between rises, nosing ¾-1¼", headroom 6'8" min, handrail on at least one side for 4+ risers.
Frequently Asked Questions
What is the Stair Calculator (Rise & Run) for?
Calculate stair rise, run, and stringer length from floor-to-floor height. IRC code limits: max 7¾" rise, min 10" run.
How do I use the Stair Calculator (Rise & Run)?
Detailed instructions, formula notes, and US-context guidance shown in the calculator above.
How accurate are my stair (rise & run) results?
Estimate only. Consult a qualified professional for decisions with major financial, legal, or health consequences.
Is the Stair Calculator (Rise & Run) free to use?
Yes - every calculator on WhichCalc is completely free with no signup, no usage limits, and no tracking on the calculation itself. Results display instantly in your browser and your inputs are never sent to a server. Bookmark the page if you use this calculator regularly.