Convert Micrograms to Troy ounces
1 microgram is 3.22e-8 ozt. One microgram is exactly 3.21507465686e-8 troy ounces.
One microgram is 3.2151 × 10^-8 troy ounces. To convert micrograms to troy ounces, multiply by 3.2151 × 10^-8; to go the other way, divide by 3.2151 × 10^-8 or multiply by 3.1103 × 10^+7. The relation is exact but the figure is not: it is a rounding of a number that does not terminate, and it follows from NIST Handbook 44. One millionth of a gram.
Factor checked against the defining standard · How we check
- Micrograms × 3.2151 × 10^-8
1 * 3.2150747e-80 ozt
1 microgram in every weight unit
| Unit | Value | Exact factor |
|---|---|---|
| ounces | 0.00000003527396195 oz | × 0.0000000352739619496 |
| pounds | 0.000000002204622622 lb | × 0.00000000220462262185 |
| stone | 0.0000000001574730444 st | × 0.000000000157473044418 |
| US tons | 0.000000000001102311311 ton | × 0.00000000000110231131092 |
| micrograms (as entered) | 1 mcg | — |
| milligrams | 0.001 mg | × 0.001 |
| centigrams | 0.0001 cg | × 0.0001 |
| grams | 0.000001 g | × 0.000001 |
| kilograms | 0.000000001 kg | × 0.000000001 |
| slugs | 0.00000000006852176586 slug | × 0.0000000000685217658568 |
| tonnes | 0.000000000001 t | × 0.000000000001 |
| carats | 0.000005 ct | × 0.000005 |
| troy ounces | 0.00000003215074657 ozt | × 0.0000000321507465686 |
| grains | 0.00001543235835 gr | × 0.0000154323583529 |
| long tons | 0 LT | × 0.000000000000984206527611 |
Factors are entered by hand from NIST Handbook 44 rather than derived from a units library, so the ones that terminate are exact rather than rounded.
How do you convert micrograms to troy ounces? The converter and the working
- 1.Take the measurement in micrograms.
- 2.Multiply by 3.2151 × 10^-8 — that is how many troy ounces fit in one microgram.
- 3.To go back the other way, divide by 3.2151 × 10^-8, or multiply by 3.1103 × 10^+7.
Worked example: 25 micrograms to troy ounces
- Formula
- mcg × 3.2151 × 10^-8 = ozt
- Arithmetic
- 25 × 3.2151 × 10^-8 = 8.04e-7 ozt
- Answer
- 25 mcg = 8.04e-7 ozt
The factor is rounded for display; the figure above is computed from the full value.
Micrograms to troy ounces conversion table
| Micrograms | Troy ounces |
|---|---|
| 1 mcg | 3.22e-8 ozt |
| 2 mcg | 6.43e-8 ozt |
| 3 mcg | 9.65e-8 ozt |
| 4 mcg | 1.29e-7 ozt |
| 5 mcg | 1.61e-7 ozt |
| 6 mcg | 1.93e-7 ozt |
| 7 mcg | 2.25e-7 ozt |
| 8 mcg | 2.57e-7 ozt |
| 9 mcg | 2.89e-7 ozt |
| 10 mcg | 3.22e-7 ozt |
| 12 mcg | 3.86e-7 ozt |
| 15 mcg | 4.82e-7 ozt |
| 20 mcg | 6.43e-7 ozt |
| 25 mcg | 8.04e-7 ozt |
| 50 mcg | 0.000001608 ozt |
| 100 mcg | 0.000003215 ozt |
| 200 mcg | 0.00000643 ozt |
| 300 mcg | 0.000009645 ozt |
| 500 mcg | 0.00001608 ozt |
| 1000 mcg | 0.00003215 ozt |
| 2000 mcg | 0.0000643 ozt |
| 5000 mcg | 0.0001608 ozt |
| 10000 mcg | 0.0003215 ozt |
What is a microgram?
One millionth of a gram. Written mcg rather than µg on labels deliberately: the Greek letter is the character most often lost in transcription, and a factor of a thousand in a dose is not a rounding error.
What is a troy ounce?
Exactly 31.1034768 grams, and the only ounce bullion is ever quoted in. It is about 10% heavier than the ounce on a kitchen scale, so a "pound" of gold — twelve troy ounces — is lighter than a pound of anything else.
How many troy ounces are in a microgram?
One microgram is 3.2151 × 10^-8 troy ounces. Going the other way, one troy ounce is 3.1103 × 10^+7 micrograms. Both figures come from the same defined relation rather than from a measurement, which is why they are the same today as they were in 1959.
Every weight unit here
The whole group — 15 units with their symbols and the size of each one in kilograms — is on the conversion index, along with every pair it makes. The table above already gives each of them relative to a microgram.
Cite this page
- APA
- Rule Calculator. (2026). Convert Micrograms to troy ounces. Rule Calculator. https://rulecalculators.com/convert/microgram-to-troy-ounce
- MLA
- "Convert Micrograms to troy ounces." Rule Calculator, August 16, 2026, https://rulecalculators.com/convert/microgram-to-troy-ounce.
- Chicago
- Rule Calculator. "Convert Micrograms to troy ounces." Rule Calculator. Last reviewed August 16, 2026. https://rulecalculators.com/convert/microgram-to-troy-ounce.
The date is when the figures on this page were last checked against their source, not the day you opened it. Add your own access date if your style needs one.
Questions people actually ask
- How many troy ounces are in a microgram?
- 3.2151 × 10^-8. Exactly 31.1034768 grams, and the only ounce bullion is ever quoted in. It is about 10% heavier than the ounce on a kitchen scale, so a "pound" of gold — twelve troy ounces — is lighter than a pound of anything else.
- How do I convert troy ounces back to micrograms?
- Divide by 3.2151 × 10^-8, or multiply by 3.1103 × 10^+7 — they are the same operation.
Other weight conversions
Troy ounces to micrograms — the same conversion the other way.