All tools / Unit Converter40 mm to inches40 mm = 1.574803 inchesFormula1 mm = 0.03937 inches, so 40 × 0.03937 = 1.574803Need another value? Use the full Unit ConverterOther mm → inches conversions1 mm → inches2 mm → inches3 mm → inches4 mm → inches5 mm → inches6 mm → inchesReverse conversion40 inches → mmRelated conversions1 km → miles1 miles → km1 cm → inches1 inches → cm1 cm → feet1 feet → cm