Millicurie (mCi)
A millicurie is one thousandth of a curie, exactly 37 MBq. US nuclear-medicine doses are written in mCi.
Symbol: mCi
Quantity: activity of a radioactive source
SI relation: 1 mCi = 37000000 Bq (exact)
Derivation: 1 mCi = 3.7 × 10⁷ Bq = 37 MBq.
Exact: yes, by definition
Typical uses
- US radiopharmaceutical doses (e.g. 10 mCi FDG)
- Laboratory isotope orders
Convert millicuries to other units
| Conversion | 1 mCi equals | Reverse |
|---|---|---|
| millicurie to becquerel | 37000000 Bq | becquerel to millicurie |
| millicurie to curie | 0.001 Ci | curie to millicurie |
| millicurie to megabecquerel | 37 MBq | megabecquerel to millicurie |
| millicurie to picocurie | 1000000000 pCi | picocurie to millicurie |
| millicurie to kilobecquerel | 37000 kBq | kilobecquerel to millicurie |
| millicurie to gigabecquerel | 0.037 GBq | gigabecquerel to millicurie |
| millicurie to microcurie | 1000 µCi | microcurie to millicurie |
| millicurie to disintegration per minute | 2220000000 dpm | disintegration per minute to millicurie |
| millicurie to terabecquerel | 0.000037 TBq | terabecquerel to millicurie |
| millicurie to nanocurie | 1000000 nCi | nanocurie to millicurie |
| millicurie to rutherford | 37 Rd | rutherford to millicurie |
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). Millicurie (mCi). Retrieved October 25, 2026, from https://scientificconverters.com/units/millicurie/
IEEE
Scientific Converters, "Millicurie (mCi)," scientificconverters.com. Accessed: Oct. 25, 2026. [Online]. Available: https://scientificconverters.com/units/millicurie/