Convert Ounces to Micrograms
1 ounce (oz) equals 28349523.13 micrograms (µg).
1 oz = 28349523.13 µg
Type in either box. Scientific notation works: 1.5e-3.
Converting a list? Use the bulk ounce to microgram converter to paste a column from Excel.
How to Convert Ounce to Microgram
- 1 oz = 28349523.13 µg
- 1 µg = 3.527396195 × 10⁻⁸ oz
- Example: convert 15 oz to µg: 15 oz = 15 × 28349523.13 µg = 425242846.9 µg
Reference conditions. oz: Avoirdupois system: 1 lb = 16 oz = 7000 grains = 0.45359237 kg exactly (1959 agreement).
Formula
µg = oz × 28349523.125
Derivation from SI units:
- 1 oz = 1/16 lb = 28.349523125 g (exact)
- 1 µg = 10⁻⁹ kg = 10⁻³ mg
- 1 oz = 0.028349523125 kg ÷ 1 × 10⁻⁹ kg per µg = 28349523.125 µg
Both units are defined exactly, so the factor is exact. Ounce definition: ounce; Microgram definition: microgram.
Worked examples
- A reading of 4 oz converts to 113398092.5 µg.
4 oz × 28349523.13 = 113398092.5 µg - A value of 12 oz is 340194277.5 µg.
12 oz × 28349523.13 = 340194277.5 µg
Ounce to Microgram conversion table
| Ounces (oz) | Micrograms (µg) |
|---|---|
| 0.25 oz | 7087380.781 µg |
| 0.5 oz | 14174761.56 µg |
| 1 oz | 28349523.13 µg |
| 2 oz | 56699046.25 µg |
| 3 oz | 85048569.38 µg |
| 4 oz | 113398092.5 µg |
| 5 oz | 141747615.6 µg |
| 6 oz | 170097138.8 µg |
| 8 oz | 226796185 µg |
| 10 oz | 283495231.3 µg |
| 12 oz | 340194277.5 µg |
| 16 oz | 453592370 µg |
| 20 oz | 566990462.5 µg |
| 24 oz | 680388555 µg |
| 32 oz | 907184740 µg |
| 64 oz | 1814369480 µg |
Where it's used
Ounces are used for food and parcel weights in the US, while micrograms appear in vitamins and trace nutrients (vitamin D, B12, folate). Both measure mass (commonly called weight), so the conversion is a fixed factor.
Ounce to other weight and mass units
| Conversion | 1 oz equals |
|---|---|
| ounce to kilogram | 0.02834952313 kg |
| ounce to gram | 28.34952313 g |
| ounce to milligram | 28349.52313 mg |
| ounce to microgram | 28349523.13 µg |
| ounce to metric ton | 0.00002834952313 t |
| ounce to pound | 0.0625 lb |
| ounce to stone | 0.004464285714 st |
| ounce to short ton | 0.00003125 ton (US) |
| ounce to long ton | 0.00002790178571 ton (UK) |
| ounce to grain | 437.5 gr |
| ounce to troy ounce | 0.9114583333 oz t |
| ounce to carat | 141.7476156 ct |
Frequently asked questions
How many micrograms are in 1 ounce?
1 oz = 28349523.13 µg.
How do I convert ounces to micrograms?
Multiply the value in oz by 28349523.13. For example, 15 oz × 28349523.13 = 425242846.9 µg.
Is the oz to µg conversion exact?
Yes. Both units are defined exactly, so the ratio is exact; its decimal form does not terminate and is shown here to 10 significant figures (more with the precision selector).
Sources
- Guide for the Use of the International System of Units (SI), NIST Special Publication 811, 2008 Edition, National Institute of Standards and Technology , Appendix B.8, "ounce (avoirdupois) (oz)".
- The International System of Units (SI), 9th edition (SI Brochure), Bureau International des Poids et Mesures , Table 7, SI prefixes.
Last reviewed: . Factors are stored exactly and computed with 50-digit decimal arithmetic. See how we verify conversion factors.
Cite this page
APA
Scientific Converters. (2026, October 15). Convert Ounces to Micrograms. Retrieved October 17, 2026, from https://scientificconverters.com/mass/ounces-to-micrograms/
IEEE
Scientific Converters, "Convert Ounces to Micrograms," scientificconverters.com. Accessed: Oct. 17, 2026. [Online]. Available: https://scientificconverters.com/mass/ounces-to-micrograms/