How to convert pounds to ounces
To convert a measurement in pounds to ounces, multiply the value by 16. The conversion factor comes from the relationship between both units and the kilogram.
For example, to convert 5 lb to ounces: 5 × 16 = 80 oz.
What is a pound?
A pound is an imperial and US customary unit of mass equal to 16 ounces or exactly 0.45359237 kilograms. The pound derives from the Roman 'libra' (hence the symbol 'lb'). The international avoirdupois pound was fixed at exactly 0.45359237 kg by the 1959 international yard and pound agreement between English-speaking nations.
Common uses of pounds include: Body weight in the US and UK; Grocery and produce pricing in the US; Bodybuilding and weightlifting loads; Shipping weights for parcels in the US.
What is a ounce?
An ounce is an imperial and US customary unit of mass equal to 1/16 of a pound or exactly 28.349523125 grams. The avoirdupois ounce descends from the Roman 'uncia' (one twelfth). It is distinct from the troy ounce used for precious metals, which is heavier at about 31.1 grams.
Common uses of ounces include: Food portions and recipe ingredients in the US; Postal and letter weights; Packaged goods net weight (cereal, snacks); Baby birth weights in the US.
Pounds to ounces worked examples
Here are some common values converted:
1 lb = 16 oz 5 lb = 80 oz 10 lb = 160 oz 50 lb = 800 oz 100 lb = 1,600 oz
Frequently asked questions
How many ounces are in one pound?
One pound (lb) equals 16 ounces (oz). Multiply any value in pounds by 16 to convert to ounces.
How do I convert pounds to ounces?
Multiply the value in pounds by 16. For example, 5 lb × 16 = 80 oz.
How do I convert ounces to pounds?
Multiply the value in ounces by 0.0625, or divide by 16. Use the swap button on the converter above to reverse the direction.
Is the pound to ounce conversion exact?
Yes. Since 1959 the international pound is defined as exactly 0.45359237 kg, so all weight conversions between metric and avoirdupois units use exact factors.
What is the formula for pounds to ounces?
The formula is: oz = lb × 16. This comes from the definition of both units relative to the kilogram.