Convert Millicuries to Becquerels
Convert Millicuries (mCi) to Becquerels (Bq) instantly and accurately.
Conversion Formula
Bq = mCi × 37000000
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.
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.
Quick Reference Table
| Millicuries (mCi) | Becquerels (Bq) |
|---|---|
| 1 mCi | 37000000 Bq |
| 2 mCi | 74000000 Bq |
| 5 mCi | 185000000 Bq |
| 10 mCi | 370000000 Bq |
| 25 mCi | 925000000 Bq |
| 50 mCi | 1.85 × 109 Bq |
| 100 mCi | 3.7 × 109 Bq |