Microcurie (µCi)
One millionth of a curie: exactly 37 kBq. Household smoke detectors contain about 1 µCi.
What is a microcurie?
- Symbol
- µCi
- Quantity
- Radioactivity
- Unit system
- other
- Definition
- One millionth of a curie: exactly 37 kBq. Household smoke detectors contain about 1 µCi.
- Exact
- Yes, the value is exact by definition
- Source
- NIST Special Publication 811 (2008), Appendix B.8
Common applications
Used for smoke detector sources, small check sources and laboratory tracer quantities.
Microcurie in other radioactivity units
- 1 µCi = 37000 BqBecquerel
- 1 µCi = 37 kBqMicrocurie to Kilobecquerel converter
- 1 µCi = 0.037 MBqMegabecquerel
- 1 µCi = 0.000037 GBqGigabecquerel
- 1 µCi = 3.7e-8 TBqTerabecquerel
- 1 µCi = 0.000001 CiCurie
- 1 µCi = 0.001 mCiMillicurie
- 1 µCi = 1000000 pCiPicocurie
- 1 µCi = 0.037 RdRutherford
- 1 µCi = 2220000 dpmDisintegration per minute
Microcurie quick reference
| Microcurie | Kilobecquerel | Gigabecquerel | Curie |
|---|---|---|---|
| 1 µCi | = 37 kBq | = 0.000037 GBq | = 0.000001 Ci |
| 10 µCi | = 370 kBq | = 0.00037 GBq | = 0.00001 Ci |
| 100 µCi | = 3700 kBq | = 0.0037 GBq | = 0.0001 Ci |
| 1000 µCi | = 37000 kBq | = 0.037 GBq | = 0.001 Ci |
Where the microcurie fits
The next smaller radioactivity unit is the kilobecquerel (kBq). 1 µCi = 37 kBq, and 1 kBq ≈ 0.02702702703 µCi.
The next larger radioactivity unit is the megabecquerel (MBq). 1 µCi = 0.037 MBq, and 1 MBq ≈ 27.02702703 µCi.
Frequently asked questions
- How many kilobecquerels are in one microcurie?
- One microcurie = 37 kBq (kilobecquerels).
- How many gigabecquerels are in one microcurie?
- One microcurie = 0.000037 GBq (gigabecquerels).
- How many curies are in one microcurie?
- One microcurie = 0.000001 Ci (curies).