mg to oz Converter
Type a value in milligrams to see it in ounces as you type, with the exact formula and a reference chart.
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How this was calculated
- 1 ounce = 28,349.52313 milligrams
- 500 ÷ 28,349.52313 = 0.017636981 oz
| mg | oz |
|---|---|
| 1 mg | 0.000035274 oz |
| 10 mg | 0.00035274 oz |
| 50 mg | 0.0017637 oz |
| 100 mg | 0.0035274 oz |
| 200 mg | 0.00705479 oz |
| 250 mg | 0.00881849 oz |
| 300 mg | 0.0105822 oz |
| 400 mg | 0.0141096 oz |
| 500 mg | 0.017637 oz |
| 750 mg | 0.0264555 oz |
| 1,000 mg | 0.035274 oz |
| 2,000 mg | 0.0705479 oz |
| 5,000 mg | 0.17637 oz |
| 10,000 mg | 0.35274 oz |
| 28,349.5 mg | 0.999999 oz |
| 100,000 mg | 3.5274 oz |
| oz | mg |
|---|---|
| 0.00002 oz | 0.56699 mg |
| 0.00005 oz | 1.41748 mg |
| 0.0001 oz | 2.83495 mg |
| 0.0002 oz | 5.6699 mg |
| 0.0005 oz | 14.1748 mg |
| 0.001 oz | 28.3495 mg |
| 0.002 oz | 56.699 mg |
| 0.005 oz | 141.748 mg |
| 0.01 oz | 283.495 mg |
| 0.02 oz | 566.99 mg |
| 0.05 oz | 1,417.48 mg |
| 0.1 oz | 2,834.95 mg |
How to convert milligrams to ounces
1 milligram = 0.000035274 ounces. To convert milligrams to ounces, divide by 28,349.52313 (or multiply by 0.000035274). A milligram is one thousandth of a gram. An avoirdupois ounce is 1/16 of a pound, exactly 28.349523125 g.
Worked examples
- 100 milligrams = 0.0035274 oz (100 ÷ 28,349.523)
- 500 milligrams = 0.017637 oz (500 ÷ 28,349.523)
- 10,000 milligrams = 0.35274 oz (10,000 ÷ 28,349.523)
Where this conversion comes up
Milligrams are used for medicine doses, vitamins, caffeine and sodium on labels; ounces for food packaging, postage and baby weight in the US. Supplement doses, gemstone and powder weights are listed in milligrams, while US postal and kitchen scales show ounces. An avoirdupois ounce is 28,349.523125 mg, so 500 mg is just 0.0176 oz and it takes over 28 grams to make one ounce. Milligrams measure weight; a liquid dose in fluid ounces is a volume, and the two only line up for water (1 ml ≈ 1,000 mg). Precious metals use the troy ounce (31,103.5 mg) instead.
Quick estimate
Divide by 28,350: 1,000 mg (1 g) ≈ 0.035 oz.
Common mistakes
- Multiplying instead of dividing. A ounce is larger than a milligram, so the number of ounces must come out smaller: 100 milligrams = 0.0035274 oz.
- Rounding too early. Keep the full factor until the last step; rounding 0.0000353 to 0.000035 first puts large values noticeably off.
Related weight converters: grams to ounces, oz to grams, oz to lbs, lbs to oz, grams to pounds, pounds to grams.
Frequently asked questions
How do you convert milligrams to ounces?
Multiply the milligrams by 0.000035274 (or divide by 28,349.52313). For example, 500 milligrams is 0.017637 ounces.
How many ounces are in one milligram?
One milligram is 0.000035274 ounces. A milligram is one thousandth of a gram.
What is 10,000 milligrams in ounces?
10,000 milligrams is 0.35274 ounces.
Is there a quick way to estimate milligrams to ounces?
Divide by 28,350: 1,000 mg (1 g) ≈ 0.035 oz.