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Fileraz
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Fileraz
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Construction Calculator
Rule-of-thumb site math, reviewed October 2026 — first-pass material estimates, not a bill of quantities or a code check. Confirm with your contractor or engineer.
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Steps are total floor-to-floor rise ÷ one riser, rounded up: 3 m at 0.18 m risers gives ceil(3 ÷ 0.18) = 17 steps, each an even 176.5 mm. Rounding up matters because a fractional step cannot be built — the page re-divides to show the even riser height the flight will actually use.
Measure the full floor-to-floor height (finished floor to finished floor, not ceiling), pick a riser in the comfortable 150–190 mm residential band, and read the count plus the even riser. Then check the pair against your building code: riser height, tread depth, and headroom all have legal limits this page does not enforce.
It does not size tread depth or going, verify headroom, or certify code compliance — a straight-flight step count. Landings, winders, and spiral geometry need proper stair design.
Not a building-code compliance tool.
Around 150–190 mm is common for residential stairs, but your local building code sets the limits — check them before building.
No. It counts steps from the rise; pair the riser with a code-compliant tread separately.
Steps must be whole and equal, so the count rounds up and every riser becomes 3000 ÷ 17 ≈ 176.5 mm — even risers, no trip step.
That is the promise behind every tool here. Files are read in your browser tab, processed there, and discarded when you close it — never uploaded to our servers.