Becquerels to Curies
Type a value in Becquerels and get the result in Curies, calculated exactly.
1 Becquerels ≈ 2.702702703 × 10⁻¹¹ Curies
Precision
Exact factorRounded for display to about 10 significant digits.
Slide rule
Drag to scrub · arrow keys step · Shift × 10Paper tape
ConvertThemAll
- Your conversions print here.
0 lines · kept on this device only
Formula
Ci = Bq ÷ 37,000,000,000
To convert Becquerels to Curies, divide the value by 37,000,000,000.
Worked examples
- 1 Bq ÷ 37,000,000,000 ≈ 2.702702703 × 10⁻¹¹ Ci
- 100 Bq ÷ 37,000,000,000 ≈ 2.702702703 × 10⁻⁹ Ci
- 50 Bq ÷ 37,000,000,000 ≈ 1.351351351 × 10⁻⁹ Ci
This factor is exact by definition.
Conversion table
| Becquerels (Bq) | Curies (Ci) |
|---|---|
| 1 | ≈ 2.702702703 × 10⁻¹¹ |
| 2 | ≈ 5.405405405 × 10⁻¹¹ |
| 3 | ≈ 8.108108108 × 10⁻¹¹ |
| 4 | ≈ 1.081081081 × 10⁻¹⁰ |
| 5 | ≈ 1.351351351 × 10⁻¹⁰ |
| 6 | ≈ 1.621621622 × 10⁻¹⁰ |
| 7 | ≈ 1.891891892 × 10⁻¹⁰ |
| 8 | ≈ 2.162162162 × 10⁻¹⁰ |
| 9 | ≈ 2.432432432 × 10⁻¹⁰ |
| 10 | ≈ 2.702702703 × 10⁻¹⁰ |
| 15 | ≈ 4.054054054 × 10⁻¹⁰ |
| 20 | ≈ 5.405405405 × 10⁻¹⁰ |
| 25 | ≈ 6.756756757 × 10⁻¹⁰ |
| 30 | ≈ 8.108108108 × 10⁻¹⁰ |
| 40 | ≈ 1.081081081 × 10⁻⁹ |
| 50 | ≈ 1.351351351 × 10⁻⁹ |
| 60 | ≈ 1.621621622 × 10⁻⁹ |
| 70 | ≈ 1.891891892 × 10⁻⁹ |
| 75 | ≈ 2.027027027 × 10⁻⁹ |
| 80 | ≈ 2.162162162 × 10⁻⁹ |
| 90 | ≈ 2.432432432 × 10⁻⁹ |
| 100 | ≈ 2.702702703 × 10⁻⁹ |
Values marked ≈ are rounded; the rest are exact.
Reverse table: Curies to Becquerels
| Curies (Ci) | Becquerels (Bq) |
|---|---|
| 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 |
| 60 | 2,220,000,000,000 |
| 70 | 2,590,000,000,000 |
| 75 | 2,775,000,000,000 |
| 80 | 2,960,000,000,000 |
| 90 | 3,330,000,000,000 |
| 100 | 3,700,000,000,000 |
Unit definitions
- Becquerels Bq
- The SI unit of activity: one decay per second.
- Curies Ci
- Exactly 3.7 × 10¹⁰ becquerels.
Questions people ask
Becquerels to Curies: what is the conversion factor?
One Bq is ≈ 2.702702703 × 10⁻¹¹ Ci.
How do I convert Becquerels to Curies?
Use the formula above. For example, 100 Bq = ≈ 2.702702703 × 10⁻⁹ Ci.
Is the conversion exact?
Yes. Both units have exact definitions, so the factor is exact; a result is only rounded when its decimals never end.
Factors checked 19 October 2026.