All tools / Unit Converter3 mm to inches3 mm = 0.11811 inchesFormula1 mm = 0.03937 inches, so 3 × 0.03937 = 0.11811Need another value? Use the full Unit ConverterOther mm → inches conversions1 mm → inches2 mm → inches5 mm → inches10 mm → inches15 mm → inches20 mm → inchesRelated conversions1 km → miles1 miles → km1 cm → inches1 inches → cm1 cm → feet1 feet → cm