Edit Weight Class
System > Localization > Weight Classes
*Weight Title: Name of the measure.
*Weight Unit: Abbreviation for the measure.
Value: Set to 1.00000 if this is your base weight.
Weight class values for conversion are defined in relation to base weight
base weight class kg set value to 1.00000
now in relation to base weight (kg) set values for other weight classes
ounce (1 Kilogram = 35.274 Ounce) set value to 35.2740
gram (1 Kilogram = 1000 Gram ) set value to 1000.0000
After you have made your changes, click save button