Radioactivity Converter
Radioactivity measures how many atomic nuclei decay per second in a sample. The SI unit is the becquerel, exactly one decay per second. The older curie is far larger — 37 billion becquerels — which is why environmental readings such as radon levels are quoted in picocuries per liter.
15 units supported Base unit becquerel (Bq)
Multiply the number of becquerels by 2.7027027027027027e-11 to get curies. How this is calculated
About radioactivity conversion
Radioactivity conversion is commonly needed when nuclear medicine, radon testing, and environmental monitoring. One curie is 37 billion becquerels, which is why trace measurements are reported in picocuries.
Popular conversions
Convert Becquerel to other radioactivity units
1 Bq expressed in every other radioactivity unit on this site.
- Becquerel Bq 1
- Kilobecquerel kBq 0.001
- Megabecquerel MBq 0.000001
- Gigabecquerel GBq 1e-9
- Terabecquerel TBq 1e-12
- Millibecquerel mBq 1,000
- Curie Ci 2.7027027e-11
- Kilocurie kCi 2.7027027e-14
- Millicurie mCi 2.7027027e-8
- Microcurie µCi 0.000027027027
- Nanocurie nCi 0.027027027
- Picocurie pCi 27.027027
- Rutherford Rd 0.000001
- Disintegration per Second dps 1
- Disintegration per Minute dpm 60
Complete list of radioactivity units
All 15 units this converter supports, each stated against the becquerel (Bq).
| Unit | Symbol | System | In becquerels | Conversions |
|---|---|---|---|---|
| Becquerel | Bq | SI | base unit (Bq) | becquerel to curiebq to pci |
| Kilobecquerel | kBq | SI | 1 kBq = 1,000 Bq | — |
| Megabecquerel | MBq | SI | 1 MBq = 1,000,000 Bq | — |
| Gigabecquerel | GBq | SI | 1 GBq = 1,000,000,000 Bq | — |
| Terabecquerel | TBq | SI | 1 TBq = 1,000,000,000,000 Bq | — |
| Millibecquerel | mBq | SI | 1 mBq = 0.001 Bq | — |
| Curie | Ci | Other | 1 Ci = 37,000,000,000 Bq | curie to becquerel |
| Kilocurie | kCi | Other | 1 kCi = 37,000,000,000,000 Bq | — |
| Millicurie | mCi | Other | 1 mCi = 37,000,000 Bq | — |
| Microcurie | µCi | Other | 1 µCi = 37,000 Bq | — |
| Nanocurie | nCi | Other | 1 nCi = 37 Bq | — |
| Picocurie | pCi | Other | 1 pCi = 0.037 Bq | pci to bq |
| Rutherford | Rd | Other | 1 Rd = 1,000,000 Bq | — |
| Disintegration per Second | dps | Other | 1 dps = 1 Bq | — |
| Disintegration per Minute | dpm | Other | 1 dpm = 0.0166666666667 Bq | — |
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Frequently asked questions
What is the base unit for radioactivity?
Radioactivity conversions on this site are calculated against the becquerel (Bq).
Which radioactivity units can I convert?
You can convert between 15 units, including becquerel, kilobecquerel, megabecquerel, gigabecquerel, and more.
Where is radioactivity conversion useful?
It is commonly needed when nuclear medicine, radon testing, and environmental monitoring.
Does this converter mix measurement systems?
The converter supports SI, Other units and keeps their exact definitions separate so results stay accurate.
Related categories
Conversion factors are based on internationally agreed unit definitions. See our methodology and sources for details on how these values are verified.