Pounds To Ounces Converter (lb To Oz) - Inch Calculator

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• Pounds to Ounces Conversion Calculator
• How to Convert Pounds to Ounces
• How Many Ounces Are in a Pound?
• What Is a Pound?
• What Is an Ounce?
• Pound to Ounce Conversion Table
• References

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Sexton, J. (n.d.). Pounds to Ounces Conversion Calculator. Inch Calculator. Retrieved January 23, 2026, from https://www.inchcalculator.com/convert/pound-to-ounce/

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

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

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

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