Popular radioactivity conversions
- Becquerels to curies1 Bq = 2.7027×10⁻¹¹ Ci
- Becquerels to millicuries1 Bq = 2.7027×10⁻⁸ mCi
- Becquerels to megabecquerels1 Bq = 0.000001 MBq
- Curies to becquerels1 Ci = 37,000,000,000 Bq
- Curies to millicuries1 Ci = 1,000 mCi
- Curies to megabecquerels1 Ci = 37,000 MBq
- Millicuries to becquerels1 mCi = 37,000,000 Bq
- Millicuries to curies1 mCi = 0.001 Ci
- Millicuries to megabecquerels1 mCi = 37 MBq
- Megabecquerels to becquerels1 MBq = 1,000,000 Bq
- Megabecquerels to curies1 MBq = 0.000027027 Ci
- Megabecquerels to millicuries1 MBq = 0.027027 mCi
- Picocuries to becquerels1 pCi = 0.037 Bq
- Becquerels to picocuries1 Bq = 27.027 pCi
- Microcuries to megabecquerels1 µCi = 0.037 MBq
- Megabecquerels to microcuries1 MBq = 27.027 µCi
About radioactivity units
Activity is the number of nuclear decays per second. One becquerel is one decay per second; the curie (3.7 × 10¹⁰ Bq) is based on the activity of a gram of radium-226. Indoor radon is reported in pCi/L in the US and Bq/m³ elsewhere.
Radioactivity unit reference
| Unit | Symbol | Value in Bq | System |
|---|---|---|---|
| Becquerel | Bq | 1 Bq | SI |
| Kilobecquerel | kBq | 1,000 Bq | SI |
| Megabecquerel | MBq | 1,000,000 Bq | SI |
| Gigabecquerel | GBq | 1,000,000,000 Bq | SI |
| Terabecquerel | TBq | 1,000,000,000,000 Bq | SI |
| Curie | Ci | 37,000,000,000 Bq | Other |
| Millicurie | mCi | 37,000,000 Bq | Other |
| Microcurie | µCi | 37,000 Bq | Other |
| Nanocurie | nCi | 37 Bq | Other |
| Picocurie | pCi | 0.037 Bq | Other |
| Rutherford | Rd | 1,000,000 Bq | Other |
| Disintegration per minute | dpm | 0.016666667 Bq | Other |
| Disintegration per second | dps | 1 Bq | Other |
Frequently asked questions
What is the SI unit of radioactivity?
This converter uses the becquerel (Bq) as its reference unit; every other unit is defined relative to it.
How many radioactivity units can I convert?
13 units are supported here, across SI, Other systems. Every pair can be converted in both directions.
Does this radioactivity converter work offline?
Yes. Once the page has loaded, every calculation runs locally in your browser — nothing is sent to a server.