Observed arrival · 2026-09-01

The ISO 286 Fit Calculator

normcalc.com Observed source

Editorial interest 78/100 Selection signal · not a rating of the site

An engineering calculator for finding hole-and-shaft limit sizes, deviations, clearances, and interference.

Landing page captured for the 2026-09-01 issue.

Field notes

The page accepts both separate tolerance selections and compact fit notation, with presets including H7/g6 and H7/p6. Its stated operating range is 0–500 mm at 20 °C, and the comparison view can narrow candidate fits by micrometre clearance or interference limits. The implementation identifies ISO 286-1:2010 and ISO 286-2:2010 plus Cor 1:2013 as its standard basis, while its release note lists version 1.2.0 and validation on 2026-08-25.

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●ProPolished or operationally mature

◎NicheUnusually specific use

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