BUILT-IN MATHEMATICA SYMBOL

# Quantity

Quantity[magnitude, unit]
represents a quantity with size magnitude and the unit specified by unit.

Quantity[unit]
assumes the magnitude of the specified unit to be 1.

## Details and OptionsDetails and Options

• Quantity has attribute HoldRest and preserves the structure of unit.
• With the option setting ThreadDepth->d, Quantity[list, unit] will automatically thread the specified unit to depth d of list.
• The specified unit should be a string or operation of strings representing the Quantity expression's unit value.
• Quantity[unit] will produce a canonicalized Quantity with a magnitude of 1.
• Quantity expressions can be created by using the Ctrl+Equal WolframAlpha interface.
• Quantity will automatically attempt to parse an unknown unit string to its canonical form.
• Supported units include all those specified by NIST Special Publication 811.

## ExamplesExamplesopen allclose all

### Basic Examples (4)Basic Examples (4)

A Quantity represents a value associated with a specific unit:

 Out[1]=

A unit can be a string or a product of strings:

 Out[1]=
 Out[2]=

Valid unit specifications include a number of physical constants:

 Out[1]=
 Out[2]=

Quantity will automatically attempt to interpret an unknown unit string:

 Out[1]=
 Out[2]=