The abbreviated form of pounds and ounces are “lb” and “oz”.

Do you write lb or lbs?

The pound is the actual unit of measurement, while “lbs.”, which stands for libra, is the common abbreviation used in expressing pounds. The correct way of abbreviation in expressing singular or plural pounds is “lb.”

How do you write out ounces?

You abbreviate the word ounces with: oz or oz.

The word ounce has been abbreviated as oz. since at least the 1500s. The abbreviation oz. comes from a shortening of the Italian word onza, meaning “ounce.”