<dependency> <groupId>javax.measure</groupId> <artifactId>unit-api</artifactId> <version>1.0</version> </dependency> Unit<Length> meter = SI.METER; Unit<Length> feet = NonSI.FOOT; double valueInMeter = 5.0; double valueInFeet = meter.getConverterTo(feet).convert(valueInMeter); Unit<Length> meter = SI.METER; Unit<Length> kilometer = SI.KILOMETER; double length1 = 2.5; double length2 = 1.8; double totalLengthInMeters = meter.getConverterToAny(kilometer).convert(length1) + meter.getConverterToAny(kilometer).convert(length2); Unit<Speed> milePerHour = NonSI.MILES_PER_HOUR; Unit<Length> meter = SI.METER; Unit<Duration> hour = SI.HOUR; Unit<Speed> meterPerHour = meter.divide(hour).asType(Speed.class);