"rule of thumb" in German rule of thumb Faustformel Faustregel rule-of-thumb grob ungefähr, approximativ Detailed translations for "rule of thumb" rule of thumb 1. mathematics rule of thumb die Faustformel{feminine} 2. other rule of thumb(also: rule of the thumb) die Faustregel{feminine} And my rule of thumb is, when you get home, get yourself a plant. Source: opensubtitles.org Corpus by OPUS Request review Meine Faustregel ist, wenn ihr heimkommt, kauft euch eine Pflanze. General rule of thumb is 36 adults or 70 children. Source: opensubtitles.org Corpus by OPUS Request review Der generellen Faustregel nach 36 Erwachsene oder 70 Kinder. rule-of-thumb rule-of-thumb(also: raw, rough, gross, roughly) grob rule-of-thumb ungefähr, approximativ{adjectiv} English synonyms for "rule of thumb" rule of thumb {n} guideline guidepost