Radiology & Specialty
Radioactivity Converter
How fast a radioactive source decays: becquerel, curie and their multiples, plus disintegrations per minute.
That is below absolute zero (−273.15 °C), which isn’t physically possible.
1 Millicurie = 37 Megabecquerels
Formula: multiply the radioactivity value by 37
1 mCi in every radioactivity unit
Tap a row to convert to that unit.
How to convert radioactivity units
How fast a radioactive source decays: becquerel, curie and their multiples, plus disintegrations per minute. Every conversion goes through one base unit, the becquerel, using exact factors, so results don’t drift.
Curies to becquerels (Ci to Bq)
To convert curies to becquerels, multiply by 37,000,000,000. 1 curie = 37,000,000,000 becquerels.
| Ci | Bq |
|---|---|
| 1 Ci | 37,000,000,000 Bq |
| 2 Ci | 74,000,000,000 Bq |
| 5 Ci | 185,000,000,000 Bq |
| 10 Ci | 370,000,000,000 Bq |
| 20 Ci | 740,000,000,000 Bq |
| 50 Ci | 1,850,000,000,000 Bq |
| 100 Ci | 3,700,000,000,000 Bq |
Becquerels to curies (Bq to Ci)
To convert becquerels to curies, divide by 37,000,000,000. 1 becquerel = 2.7027 × 10⁻¹¹ curies.
| Bq | Ci |
|---|---|
| 1 Bq | 2.7027 × 10⁻¹¹ Ci |
| 2 Bq | 5.40541 × 10⁻¹¹ Ci |
| 5 Bq | 1.35135 × 10⁻¹⁰ Ci |
| 10 Bq | 2.7027 × 10⁻¹⁰ Ci |
| 20 Bq | 5.40541 × 10⁻¹⁰ Ci |
| 50 Bq | 1.35135 × 10⁻⁹ Ci |
| 100 Bq | 2.7027 × 10⁻⁹ Ci |
Millicuries to megabecquerels (mCi to MBq)
To convert millicuries to megabecquerels, multiply by 37. 1 millicurie = 37 megabecquerels.
Megabecquerels to millicuries (MBq to mCi)
To convert megabecquerels to millicuries, divide by 37. 1 megabecquerel = 0.02702703 millicuries.