Convert curie to becquerel instantly. Type in either field — results update live.
Selected Ci values converted to Bq using the exact factor from this tool.
| Ci | Bq |
|---|---|
| 0.01 | 370,000,000 |
| 0.1 | 3,700,000,000 |
| 1 | 37,000,000,000 |
| 2 | 74,000,000,000 |
| 3 | 111,000,000,000 |
| 5 | 185,000,000,000 |
| 10 | 370,000,000,000 |
| 20 | 740,000,000,000 |
| 50 | 1,850,000,000,000 |
| 100 | 3,700,000,000,000 |
| 1,000 | 37,000,000,000,000 |
Exact conversion factors in both directions, plus a worked example.
1 Ci = 3.7e+10 Bq
1 Bq = 2.702702703e-11 Ci
To convert curie to becquerel, multiply by 3.7e+10.
To convert becquerel to curie, multiply by 2.702702703e-11.
Example: convert 10 Ci to Bq
10 × 3.7e+10 = 3.7e+11 Bq
Short background on the units used in this conversion.
The curie (Ci) equals 3.7×10¹⁰ becquerels — historically defined from the activity of 1 gram of radium-226.
Curies label radioisotope source strength in nuclear medicine, industrial gauges, and legacy specifications — the most searched activity conversion.
The becquerel (Bq) is the SI unit of radioactivity — one nuclear disintegration per second.
Becquerels quantify source strength in nuclear medicine, environmental monitoring, and regulatory labeling worldwide.
Bq = Ci × 37,000,000,000Ci = Bq × 0.00000000002702702703, using the same exact factors as this converter.