QuantityMagnitude

QuantityMagnitude[quantity] extracts the numerical value from a quantity. QuantityMagnitude[quantity, unit] gives the value in specific units.

Examples

Extract numerical values:

QuantityMagnitude[Quantity[5, "Meters"]]
(* 5 *)

(* Convert and extract *)
QuantityMagnitude[Quantity[1, "Kilometers"], "Meters"]
(* 1000 *)

QuantityMagnitude[Quantity[100, "Celsius"], "Fahrenheit"]
(* 212 *)

Please visit the official Wolfram Language Reference for more details.