Calculate with Units

The Wolfram Language has sophisticated built-in functions for computing with, converting and analyzing quantities with units.

Put quantities with units into your Inputs

Enter quantities with units using either natural language input or Quantity . See Enter Quantities with Units for details:

Use UnitConvert to convert to different units if necessary:

The second argument to QuantityMagnitude is optional, but it is safest to specify it explicitly if the first argument is a computation, since units may change in the course of a computation.

For large arrays of quantities with units, use QuantityArray for the best computational and representational efficiency:

Some computations whose inputs do not have units yield outputs with units:

Natural language queries often return quantities with units:

Many Wolfram Language functions work properly with inputs that have units:

In contrast to most units, dimensionless units behave like numbers in many situations: