Microcurie (µCi)
A microcurie is one millionth of a curie, exactly 37 kBq: the scale of check sources and smoke detectors (about 1 µCi).
Symbol: µCi (ASCII: uCi)
Quantity: activity of a radioactive source
SI relation: 1 µCi = 37000 Bq (exact)
Derivation: 1 µCi = 3.7 × 10⁴ Bq = 37 kBq.
Exact: yes, by definition
Typical uses
- Check and calibration sources
- Laboratory tracer amounts
Convert microcuries to other units
| Conversion | 1 µCi equals | Reverse |
|---|---|---|
| microcurie to becquerel | 37000 Bq | becquerel to microcurie |
| microcurie to curie | 0.000001 Ci | curie to microcurie |
| microcurie to megabecquerel | 0.037 MBq | megabecquerel to microcurie |
| microcurie to millicurie | 0.001 mCi | millicurie to microcurie |
| microcurie to picocurie | 1000000 pCi | picocurie to microcurie |
| microcurie to kilobecquerel | 37 kBq | kilobecquerel to microcurie |
| microcurie to gigabecquerel | 0.000037 GBq | gigabecquerel to microcurie |
| microcurie to disintegration per minute | 2220000 dpm | disintegration per minute to microcurie |
| microcurie to terabecquerel | 3.7 × 10⁻⁸ TBq | terabecquerel to microcurie |
| microcurie to nanocurie | 1000 nCi | nanocurie to microcurie |
| microcurie to rutherford | 0.037 Rd | rutherford to microcurie |
Open the Radioactivity Converter to convert any value between all units.
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, "curie".
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). Microcurie (µCi). Retrieved October 25, 2026, from https://scientificconverters.com/units/microcurie/
IEEE
Scientific Converters, "Microcurie (µCi)," scientificconverters.com. Accessed: Oct. 25, 2026. [Online]. Available: https://scientificconverters.com/units/microcurie/