Curie to Becquerel Converter
1 curie is exactly 37000000000 becquerels. Convert curies (Ci) to becquerels (Bq) below: type a value and the result updates as you type.
Ci to Bq calculator
Result
Curie to Becquerel conversion
1 Ci = 37000000000 Bqone curie in becquerels
1 Bq ≈ 2.702702703e-11 Cione becquerel in curies
Curie (Ci): Older unit of radioactivity, originally about one gram of radium-226: exactly 3.7 × 10¹⁰ Bq.
Becquerel (Bq): SI unit of radioactivity: one decay per second.
Source:Curie: NIST Special Publication 811 (2008), Appendix B.8; Becquerel: SI Brochure, 9th edition (BIPM, 2019)
How to convert curies to becquerels
To convert curies to becquerels, multiply the number of curies by 37000000000.
Formula
Bq = Ci × 37000000000
Examples
- 5 Ci = 5 × 37000000000 = 185000000000 Bq
- 25 Ci = 25 × 37000000000 = 925000000000 Bq
- 100 Ci = 100 × 37000000000 = 3700000000000 Bq
Curie to Becquerel conversion table
| Curie (Ci) | Becquerel (Bq) |
|---|---|
| 0.1 Ci | 3700000000 Bq |
| 0.5 Ci | 18500000000 Bq |
| 1 Ci | 37000000000 Bq |
| 2 Ci | 74000000000 Bq |
| 3 Ci | 111000000000 Bq |
| 5 Ci | 185000000000 Bq |
| 10 Ci | 370000000000 Bq |
| 20 Ci | 740000000000 Bq |
| 25 Ci | 925000000000 Bq |
| 50 Ci | 1850000000000 Bq |
| 100 Ci | 3700000000000 Bq |
| 250 Ci | 9250000000000 Bq |
| 500 Ci | 18500000000000 Bq |
| 1000 Ci | 37000000000000 Bq |
Values rounded to 10 significant digits where needed.
Frequently asked questions
- How many becquerels are in one curie?
- One curie is exactly 37000000000 becquerels.
- How do I convert becquerels to curies?
- To convert becquerels to curies, divide the number of becquerels by 37000000000. The formula is Ci = Bq ÷ 37000000000.
- Is this conversion exact?
- Yes. Both units have exact definitions and the factor 37000000000 is exact. Displayed results are only rounded when they have many decimal places.
- Which is larger, a curie or a becquerel?
- A curie is 37000000000 times larger than a becquerel. In other words, a becquerel is exactly 1/37000000000 of a curie.