All tools / Unit Converter30 kmh to mph30 kmh = 18.641136 mphFormula1 kmh = 0.621371 mph, so 30 × 0.621371 = 18.641136Need another value? Use the full Unit ConverterOther kmh → mph conversions1 kmh → mph2 kmh → mph3 kmh → mph5 kmh → mph10 kmh → mph15 kmh → mphReverse conversion30 mph → kmhRelated conversions1 mph → kmh1 mps → kmh1 knots → kmh