Microgram (µg)
One millionth of a gram.
What is a microgram?
- Symbol
- µg
- Quantity
- Weight & Mass
- Unit system
- SI
- Definition
- One millionth of a gram.
- Exact
- Yes, the value is exact by definition
- Source
- SI Brochure, 9th edition (BIPM, 2019)
Common applications
Used for vitamin and medicine doses and for trace amounts in laboratory work and air-quality measurements.
Microgram in other weight & mass units
- 1 µg = 0.001 mgMilligram
- 1 µg = 0.000001 gGram
- 1 µg = 1e-9 kgKilogram
- 1 µg = 1e-12 tTonne (metric ton)
- 1 µg = 0.000005 ctCarat (metric)
- 1 µg ≈ 0.00001543235835 grGrain
- 1 µg ≈ 3.527396195e-8 ozOunce
- 1 µg ≈ 2.204622622e-9 lbPound
- 1 µg ≈ 1.102311311e-12 short tnShort ton (US ton)
- 1 µg ≈ 9.842065276e-13 long tnLong ton (UK ton)
Microgram quick reference
| Microgram | Kilogram | Pound | Milligram |
|---|---|---|---|
| 1 µg | = 1e-9 kg | ≈ 2.204622622e-9 lb | = 0.001 mg |
| 10 µg | = 1e-8 kg | ≈ 2.204622622e-8 lb | = 0.01 mg |
| 100 µg | = 1e-7 kg | ≈ 2.204622622e-7 lb | = 0.1 mg |
| 1000 µg | = 0.000001 kg | ≈ 0.000002204622622 lb | = 1 mg |
Where the microgram fits
The next larger weight & mass unit is the milligram (mg). 1 µg = 0.001 mg, and 1 mg = 1000 µg.
Frequently asked questions
- How many kilograms are in one microgram?
- One microgram = 1e-9 kg (kilograms).
- How many pounds are in one microgram?
- One microgram ≈ 2.204622622e-9 lb (pounds).
- How many milligrams are in one microgram?
- One microgram = 0.001 mg (milligrams).