Convert Becquerels to Millicuries
Convert Becquerels (Bq) to Millicuries (mCi) instantly and accurately.
Conversion Formula
mCi = Bq × 2.702702703e-8
About Becquerels
The becquerel (Bq) is the SI coherent unit of radioactivity, defined as exactly one nuclear disintegration per second. Named after Henri Becquerel (discoverer of radioactivity, 1896), it replaced the curie in SI. Household smoke detector ²⁴¹Am sources contain ~30 kBq; a banana contains ~15 Bq of ⁴⁰K. 1 Bq = 1 s⁻¹.
About Millicuries
The millicurie (mCi) equals 3.7 × 10⁷ Bq = 37 MBq. The primary clinical nuclear medicine unit in the US: ¹⁸F-FDG PET doses are 8-15 mCi; ⁹⁹mTc cardiac stress tests use 25-35 mCi; ¹³¹I hyperthyroidism therapy uses 5-30 mCi. US pharmacopeia and NRC regulations specify doses in mCi. 1 mCi = 3.7 × 10⁷ Bq.
Quick Reference Table
| Becquerels (Bq) | Millicuries (mCi) |
|---|---|
| 1 Bq | 2.703 × 10-8 mCi |
| 2 Bq | 5.405 × 10-8 mCi |
| 5 Bq | 1.351 × 10-7 mCi |
| 10 Bq | 2.703 × 10-7 mCi |
| 25 Bq | 6.757 × 10-7 mCi |
| 50 Bq | 1.351 × 10-6 mCi |
| 100 Bq | 2.703 × 10-6 mCi |