Pounds to Ounces Converter

About the lb to oz calculation

One pound is exactly 16 ounces, so converting between them is a single multiplication. Enter any value above and the result updates as you type. The everyday US weight unit. Defined as exactly 0.45359237 kg since 1959. Common in US recipes and for postal weights. Not the same as a fluid ounce.

Formula

oz = lb × 16

1 lb = 16 oz
1 oz = 0.0625 lb

Worked example

To convert 150 lb, multiply by 16: 150 × 16 = 2,400 oz.

Frequently asked questions

How many ounces are in a pound?

There are 16 ounces in one pound. To convert any amount, multiply the number of pounds by 16.

How do I convert ounces back to pounds?

Divide instead of multiplying, or equivalently multiply by 0.0625. One ounce is 0.0625 pounds.

Is this conversion exact?

Yes. Since the international agreement of 1959, the relationship between pounds and ounces is defined exactly rather than measured, so the only rounding here is in how many decimal places we show.

Where is each of these units used?

Pounds: the everyday US weight unit. Defined as exactly 0.45359237 kg since 1959. Ounces: common in US recipes and for postal weights. Not the same as a fluid ounce.

Sources

• NIST Special Publication 811 — Guide for the Use of the International System of Units