Convert Megacuries to Millicuries
Convert Megacuries (MCi) to Millicuries (mCi) instantly and accurately.
Conversion Formula
mCi = MCi × 1000000000
About Megacuries
The megacurie (MCi) equals 3.7 × 10¹⁶ Bq. Total radioactive inventory of a large nuclear power reactor core at shutdown is ~2000-10000 MCi; US atmospheric nuclear weapons tests released ~12000 MCi of ¹³¹I globally; high-level nuclear waste repositories are characterised in MCi. 1 MCi = 3.7 × 10¹⁶ Bq.
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
| Megacuries (MCi) | Millicuries (mCi) |
|---|---|
| 1 MCi | 1000000000 mCi |
| 2 MCi | 2 × 109 mCi |
| 5 MCi | 5 × 109 mCi |
| 10 MCi | 1 × 1010 mCi |
| 25 MCi | 2.5 × 1010 mCi |
| 50 MCi | 5 × 1010 mCi |
| 100 MCi | 1 × 1011 mCi |