Convert Curie to Becquerel
Live bidirectional calculator for Curies (Ci) and Becquerels (Bq) with verified formula and conversion charts.
Radioactivity8 units
How the Calculation Works (Linear Scaling)
Since 1 Curie = 37000000000 Becquerels, multiply the value in Curies by 37000000000.
Curie to Becquerel Conversion Table
Precomputed values for quick reference and printing.
| Curie | Becquerel |
|---|---|
| 1 Ci | 37000000000 Bq |
| 2 Ci | 74000000000 Bq |
| 3 Ci | 111000000000 Bq |
| 4 Ci | 148000000000 Bq |
| 5 Ci | 185000000000 Bq |
| 6 Ci | 222000000000 Bq |
| 7 Ci | 259000000000 Bq |
| 8 Ci | 296000000000 Bq |
| 9 Ci | 333000000000 Bq |
| 10 Ci | 370000000000 Bq |
| 15 Ci | 555000000000 Bq |
| 20 Ci | 740000000000 Bq |
| 25 Ci | 925000000000 Bq |
| 30 Ci | 1.11e+12 Bq |
| 40 Ci | 1.48e+12 Bq |
| 50 Ci | 1.85e+12 Bq |
| 75 Ci | 2.775e+12 Bq |
| 100 Ci | 3.7e+12 Bq |
| Becquerel | Curie |
|---|---|
| 1 Bq | 2.7027e-11 Ci |
| 2 Bq | 5.4054e-11 Ci |
| 3 Bq | 8.1081e-11 Ci |
| 4 Bq | 1.0811e-10 Ci |
| 5 Bq | 1.3514e-10 Ci |
| 6 Bq | 1.6216e-10 Ci |
| 7 Bq | 1.8919e-10 Ci |
| 8 Bq | 2.1622e-10 Ci |
| 9 Bq | 2.4324e-10 Ci |
| 10 Bq | 2.7027e-10 Ci |
| 15 Bq | 4.0541e-10 Ci |
| 20 Bq | 5.4054e-10 Ci |
| 25 Bq | 6.7568e-10 Ci |
| 30 Bq | 8.1081e-10 Ci |
| 40 Bq | 1.0811e-9 Ci |
| 50 Bq | 1.3514e-9 Ci |
| 75 Bq | 2.027e-9 Ci |
| 100 Bq | 2.7027e-9 Ci |
๐ Standard Benchmark Reference Values
Exact definition based on historical activity of 1 gram of Radium-226.
Exact RatioAbout Curie (Ci)
A non-SI unit of radioactivity defined as exactly 3.7 ร 10ยนโฐ becquerels (37 GBq), originally intended to be approximately the activity of 1 gram of radium-226.
History: Established in 1910 at the Radiology Congress in Brussels in honor of Marie and Pierre Curie.
Common Uses: Industrial radiography cameras (Ir-192 sources rated in Curies), legacy nuclear reactor inventories, radiation sterilization plants.
About Becquerel (Bq)
The SI coherent derived unit of radioactivity, defined as the activity of a quantity of radioactive material in which one nucleus decays per second (1 Bq = 1 sโปยน).
History: Named in 1975 after French physicist Henri Becquerel, who discovered radioactivity in 1896 along with Marie and Pierre Curie.
Common Uses: Nuclear physics, radiological environmental monitoring, radioactive tracer labeling, food radiation safety.
โ Frequently Asked Questions
How many Becquerels are in 1 Curie?
There are exactly 37000000000 Becquerels in 1 Curie (1 Ci = 37000000000 Bq).
What is the formula to convert Curie to Becquerel?
The formula is: Becquerel = Curie ร 37000000000. Since 1 Curie = 37000000000 Becquerels, multiply the value in Curies by 37000000000.
How do I convert 1 Ci to Bq manually?
To convert 1 Ci to Bq: apply the formula Becquerel = Curie ร 37000000000. Substituting gives: 1 ร 37000000000 = 37000000000 Bq.