Convert Curies to Millibecquerels
Convert Curies (Ci) to Millibecquerels (mBq) instantly and accurately.
Conversion Formula
mBq = Ci × 37000000000000
About Curies
The curie (Ci) equals exactly 3.7 × 10¹⁰ Bq = 37 GBq, originally defined as the activity of 1 g of ²²⁶Ra. Still widely used in the US: ⁶⁰Co teletherapy sources are 5000-15000 Ci; ¹³⁷Cs blood irradiators are 1000-40000 Ci; NRC source licences for industrial radiography cite Ci limits. 1 Ci = 3.7 × 10¹⁰ Bq.
About Millibecquerels
The millibecquerel (mBq) equals 10⁻³ Bq. Radiological surface contamination surveys in nuclear facilities use mBq/cm² alert levels for alpha and beta emitters; uranium and plutonium bioassay in urine from occupationally exposed workers is reported in mBq/sample. 1 mBq = 10⁻³ Bq = 10⁻³ s⁻¹.
Quick Reference Table
| Curies (Ci) | Millibecquerels (mBq) |
|---|---|
| 1 Ci | 3.7 × 1013 mBq |
| 2 Ci | 7.4 × 1013 mBq |
| 5 Ci | 1.85 × 1014 mBq |
| 10 Ci | 3.7 × 1014 mBq |
| 25 Ci | 9.25 × 1014 mBq |
| 50 Ci | 1.85 × 1015 mBq |
| 100 Ci | 3.7 × 1015 mBq |