Pounds to Ounces Conversion Calculator

Enter the weight in pounds below to convert it to ounces.

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Result in Ounces:

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1 lb = 16 oz
Learn how we calculate this below

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How to Convert Pounds to Ounces

To convert a measurement in pounds to a measurement in ounces, multiply the weight by the following conversion ratio: 16 ounces/pound.

Since one pound is equal to 16 ounces, you can use this simple formula to convert:

ounces = pounds × 16

The weight in ounces is equal to the weight in pounds multiplied by 16.

For example, here's how to convert 5 pounds to ounces using the formula above.

ounces = (5 lb × 16) = 80 oz

conversion scale showing pounds and equivalent ounces weight values

How Many Ounces Are in a Pound?

There are 16 ounces in a pound, which is why we use this value in the formula above.

1 lb = 16 oz

infographic showing how to convert pounds to ounces

Pounds and ounces are both units used to measure weight. Keep reading to learn more about each unit of measure.

If you'd prefer to learn about this in a different way, consider watching our video that explains the lb to oz conversion step by step.

What Is a Pound?

Pounds are a widely used unit of weight in the United States. The National Bureau of Standards approved the international definition of the pound for use in the United States in 1959 after an agreement between six nations referred to as the International Yard and Pound Agreement.[1]

One pound is equal to 16 ounces, or 0.45359237 kilograms. In the avoirdupois or apothecaries' systems, one pound is equal to 7,000 grains.[2]

The pound is a US customary and imperial unit of weight. A pound is sometimes also referred to as a common ounce. Pounds can be abbreviated as lb (plural lbs), and are also sometimes abbreviated as lbm or #. For example, 1 pound can be written as 1 lb, 1 lbm, or 1 #, and 2 pounds can be written as 2 lbs.

Learn more about pounds.

What Is an Ounce?

One ounce is a unit of mass/weight equal to 1/16 of a pound or 28.349523 grams. The common ounce should not be confused with the troy ounce, which is equal to 1/12 of a troy pound.[3]

The ounce is a US customary and imperial unit of weight. Ounces can be abbreviated as oz; for example, 1 ounce can be written as 1 oz.

Learn more about ounces.

Pound to Ounce Conversion Table

Table showing various pound measurements converted to ounces.
Pounds Ounces
1 lb 16 oz
2 lb 32 oz
3 lb 48 oz
4 lb 64 oz
5 lb 80 oz
6 lb 96 oz
7 lb 112 oz
8 lb 128 oz
9 lb 144 oz
10 lb 160 oz
11 lb 176 oz
12 lb 192 oz
13 lb 208 oz
14 lb 224 oz
15 lb 240 oz
16 lb 256 oz
17 lb 272 oz
18 lb 288 oz
19 lb 304 oz
20 lb 320 oz
21 lb 336 oz
22 lb 352 oz
23 lb 368 oz
24 lb 384 oz
25 lb 400 oz
26 lb 416 oz
27 lb 432 oz
28 lb 448 oz
29 lb 464 oz
30 lb 480 oz
31 lb 496 oz
32 lb 512 oz
33 lb 528 oz
34 lb 544 oz
35 lb 560 oz
36 lb 576 oz
37 lb 592 oz
38 lb 608 oz
39 lb 624 oz
40 lb 640 oz

References

  1. National Bureau of Standards, Refinement of Values for the Yard and Pound, U.S. Department of Commerce, July 1, 1959, https://www.nist.gov/system/files/documents/2017/05/09/frn-59-5442-1959.pdf
  2. Encyclopædia Britannica, Avoirdupois weight, https://www.britannica.com/science/avoirdupois-weight
  3. James Bucki, Troy Ounce vs. Ounce, The Spruce, https://www.thesprucecrafts.com/troy-ounce-vs-ounce-4588158

More Pound & Ounce Conversions

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