Radioactivity Converter
Convert between becquerels, curies, millicuries, microcuries, disintegrations per minute and other units of radioactivity.
1 becquerel = 2.7027027 × 10-11 curies
Most used radioactivity units
- Becquerel Bq Base unit
- Curie Ci 1 Ci = 37,000,000,000 Bq
- Millicurie mCi 1 mCi = 37,000,000 Bq
- Megabecquerel MBq 1 MBq = 1,000,000 Bq
- Kilobecquerel kBq 1 kBq = 1,000 Bq
- Microcurie µCi 1 µCi = 37,000 Bq
- Picocurie pCi 1 pCi = 0.037 Bq
- Gigabecquerel GBq 1 GBq = 1,000,000,000 Bq
- Disintegration per minute dpm 1 dpm = 0.016666667 Bq
- Nanocurie nCi 1 nCi = 37 Bq
- Terabecquerel TBq 1 TBq = 1,000,000,000,000 Bq
- Disintegration per second dps 1 dps = 1 Bq
Popular radioactivity conversions
- Becquerels to curies 1 Bq = 2.7027027 × 10-11 Ci
- Curies to becquerels 1 Ci = 37,000,000,000 Bq
- Millicuries to megabecquerels 1 mCi = 37 MBq
- Megabecquerels to millicuries 1 MBq = 0.02702703 mCi
- Microcuries to kilobecquerels 1 µCi = 37 kBq
- Picocuries to becquerels 1 pCi = 0.037 Bq
What is radioactivity?
Radioactivity, or activity, is the number of radioactive decays per second in a sample. The SI unit is the becquerel (Bq), one decay per second, named after Henri Becquerel, who discovered radioactivity in 1896. The older curie (Ci), still used in the US, is based on the activity of one gram of radium-226: exactly 3.7 × 10¹⁰ Bq.
Activity says how many atoms decay, not how much harm the radiation does; that depends on the type and energy of the radiation and is measured as a dose in grays or sieverts.
Radioactivity units from smallest to largest
Every proportional radioactivity unit on the site, ordered by size and expressed in becquerels.
- Disintegration per minute 0.0166667 Bq
- Picocurie 0.037 Bq
- Becquerel 1 Bq
- Disintegration per second 1 Bq
- Nanocurie 37 Bq
- Kilobecquerel 1,000 Bq
- Microcurie 37,000 Bq
- Megabecquerel 1,000,000 Bq
- Rutherford 1,000,000 Bq
- Millicurie 37,000,000 Bq
- Gigabecquerel 1,000,000,000 Bq
- Curie 37,000,000,000 Bq
- Terabecquerel 1,000,000,000,000 Bq
- Kilocurie 37,000,000,000,000 Bq
- Petabecquerel 1 × 1015 Bq
- Megacurie 3.7 × 1016 Bq
All 16 radioactivity units
SI
Curies
Other
Frequently asked questions
How many becquerels are in a curie?
Exactly 3.7 × 10¹⁰ Bq (37 GBq).
How radioactive is a banana?
About 15 Bq, from its natural potassium-40.