Curies to Becquerels Converter Ci → Bq
1 curie (Ci) = 37,000,000,000 becquerels (Bq). Type a value below — the conversion happens instantly, entirely on your device.
1 Ci = 37000000000 Bq
1 curies = 37000000000 becquerels
1 × 37000000000 = 37000000000
1 Ci equals 37000000000 Bq, so multiplying by 37000000000 converts the value. The result describes the exact same quantity — only the measuring stick changes.
How to convert curies to becquerels
becquerels = curies × 37,000,000,000 — multiply the curie value by 37,000,000,000.
Example: 10 Ci = 370,000,000,000 Bq.
To convert the other way: curies = becquerels ÷ 37,000,000,000 — or use the dedicated Bq to Ci converter .
Curies to Becquerels conversion table
| Curies (Ci) | Becquerels (Bq) |
|---|---|
| 0.1 | 3,700,000,000 |
| 0.25 | 9,250,000,000 |
| 0.5 | 18,500,000,000 |
| 1 | 37,000,000,000 |
| 2 | 74,000,000,000 |
| 3 | 111,000,000,000 |
| 4 | 148,000,000,000 |
| 5 | 185,000,000,000 |
| 6 | 222,000,000,000 |
| 7 | 259,000,000,000 |
| 8 | 296,000,000,000 |
| 9 | 333,000,000,000 |
| 10 | 370,000,000,000 |
| 15 | 555,000,000,000 |
| 20 | 740,000,000,000 |
| 25 | 925,000,000,000 |
| 30 | 1,110,000,000,000 |
| 40 | 1,480,000,000,000 |
| 50 | 1,850,000,000,000 |
| 75 | 2,775,000,000,000 |
| 100 | 3,700,000,000,000 |
| 250 | 9,250,000,000,000 |
| 500 | 18,500,000,000,000 |
| 1000 | 37,000,000,000,000 |
About the units
What is a curie?
The traditional unit, defined as exactly 3.7×10¹⁰ Bq — originally the activity of one gram of radium-226. Still common in the US and in older literature.
What is a becquerel?
The SI unit of radioactivity — one nuclear decay (disintegration) per second. A very small unit: a banana is about 15 Bq, a human body around 4,000 Bq.
Frequently asked questions
How many becquerels are in 1 curie?
1 curie (Ci) = 37,000,000,000 becquerels (Bq).
What is the formula to convert curies to becquerels?
becquerels = curies × 37,000,000,000 — multiply the curie value by 37,000,000,000.
How do I convert Ci to Bq without a calculator?
Multiply by 37,000,000,000 for a close estimate. Exact factor: 1 Ci = 37,000,000,000 Bq.
Is this Ci-to-Bq converter accurate and private?
Yes. It uses the exact internationally defined conversion factors and computes results locally in your browser — your input is never sent to a server, and the page keeps working offline.