Ounce Conversion Calculator

Enter a value in ounces below to convert to another unit of weight.

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Do you want to convert ounces to grams or ounces to pounds?

Ounce Conversion Calculators

You can also convert weight using one of our ounce converters below.

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What Is an Ounce?

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By
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Joe is the creator of Inch Calculator and has over 20 years of experience in engineering and construction. He holds several degrees and certifications.

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An ounce is a unit used to measure weight.

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.

How Much 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.[1]

How to Convert Ounces

To convert ounces to another unit of weight, you need to multiply the value by a conversion factor. A conversion factor is a numerical value used to change the units of a measurement without changing the value.[2]

You can find the conversion factors for ounces in the conversion table below.

Then, multiply the weight measurement by the conversion factor to find the equivalent value in the desired unit of measurement.

ounces × conversion factor = result

You can also use a calculator, such as one of the converters below, for the conversion.

Ounce Conversion Table

Common ounce values and equivalent imperial and metric weight measurements
ounces tons pounds metric tons kilograms grams milligrams calories long tons carats
1 oz 0.00003125 t 0.0625 lb 0.00002835 t 0.02835 kg 28.349523 g 28,350 mg 218.75 kcal 0.000027902 lt 141.747616 ct
2 oz 0.0000625 t 0.125 lb 0.000056699 t 0.056699 kg 56.699046 g 56,699 mg 437.5 kcal 0.000055804 lt 283.495231 ct
3 oz 0.00009375 t 0.1875 lb 0.000085049 t 0.085049 kg 85.048569 g 85,049 mg 656.25 kcal 0.000083705 lt 425.242847 ct
4 oz 0.000125 t 0.25 lb 0.000113 t 0.113398 kg 113.398093 g 113,398 mg 875 kcal 0.000112 lt 566.990463 ct
5 oz 0.000156 t 0.3125 lb 0.000142 t 0.141748 kg 141.747616 g 141,748 mg 1,094 kcal 0.00014 lt 708.738078 ct
6 oz 0.000188 t 0.375 lb 0.00017 t 0.170097 kg 170.097139 g 170,097 mg 1,313 kcal 0.000167 lt 850.485694 ct
7 oz 0.000219 t 0.4375 lb 0.000198 t 0.198447 kg 198.446662 g 198,447 mg 1,531 kcal 0.000195 lt 992.233309 ct
8 oz 0.00025 t 0.5 lb 0.000227 t 0.226796 kg 226.796185 g 226,796 mg 1,750 kcal 0.000223 lt 1,134 ct
9 oz 0.000281 t 0.5625 lb 0.000255 t 0.255146 kg 255.145708 g 255,146 mg 1,969 kcal 0.000251 lt 1,276 ct
10 oz 0.000313 t 0.625 lb 0.000283 t 0.283495 kg 283.495231 g 283,495 mg 2,188 kcal 0.000279 lt 1,417 ct
11 oz 0.000344 t 0.6875 lb 0.000312 t 0.311845 kg 311.844754 g 311,845 mg 2,406 kcal 0.000307 lt 1,559 ct
12 oz 0.000375 t 0.75 lb 0.00034 t 0.340194 kg 340.194278 g 340,194 mg 2,625 kcal 0.000335 lt 1,701 ct
13 oz 0.000406 t 0.8125 lb 0.000369 t 0.368544 kg 368.543801 g 368,544 mg 2,844 kcal 0.000363 lt 1,843 ct
14 oz 0.000438 t 0.875 lb 0.000397 t 0.396893 kg 396.893324 g 396,893 mg 3,063 kcal 0.000391 lt 1,984 ct
15 oz 0.000469 t 0.9375 lb 0.000425 t 0.425243 kg 425.242847 g 425,243 mg 3,281 kcal 0.000419 lt 2,126 ct
16 oz 0.0005 t 1 lb 0.000454 t 0.453592 kg 453.59237 g 453,592 mg 3,500 kcal 0.000446 lt 2,268 ct
17 oz 0.000531 t 1.0625 lb 0.000482 t 0.481942 kg 481.941893 g 481,942 mg 3,719 kcal 0.000474 lt 2,410 ct
18 oz 0.000563 t 1.125 lb 0.00051 t 0.510291 kg 510.291416 g 510,291 mg 3,938 kcal 0.000502 lt 2,551 ct
19 oz 0.000594 t 1.1875 lb 0.000539 t 0.538641 kg 538.640939 g 538,641 mg 4,156 kcal 0.00053 lt 2,693 ct
20 oz 0.000625 t 1.25 lb 0.000567 t 0.56699 kg 566.990463 g 566,990 mg 4,375 kcal 0.000558 lt 2,835 ct

References

  1. James Bucki, Troy Ounce vs. Ounce, The Spruce, https://www.thesprucecrafts.com/troy-ounce-vs-ounce-4588158
  2. National Institute of Standards & Technology, Unit Conversion, https://www.nist.gov/pml/owm/metric-si/unit-conversion

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