Convert Curies to Picobecquerels
Convert Curies (Ci) to Picobecquerels (pBq) instantly and accurately.
Conversion Formula
pBq = Ci × 3.700000000e+22
About Curies
The curie (Ci) equals exactly 3.7 × 10¹⁰ Bq = 37 GBq, originally defined as the activity of 1 g of ²²⁶Ra. Still widely used in the US: ⁶⁰Co teletherapy sources are 5000-15000 Ci; ¹³⁷Cs blood irradiators are 1000-40000 Ci; NRC source licences for industrial radiography cite Ci limits. 1 Ci = 3.7 × 10¹⁰ Bq.
About Picobecquerels
The picobecquerel (pBq) equals 10⁻¹² Bq. Environmental monitoring of drinking water reports naturally occurring ²²⁶Ra and ²²⁸Ra at pBq/L; ultra-low background Geiger counters in underground laboratories detect pBq-level contamination on detector surfaces. 1 pBq = 10⁻¹² Bq = 10⁻³ nBq.
Quick Reference Table
| Curies (Ci) | Picobecquerels (pBq) |
|---|---|
| 1 Ci | 3.7 × 1022 pBq |
| 2 Ci | 7.4 × 1022 pBq |
| 5 Ci | 1.85 × 1023 pBq |
| 10 Ci | 3.7 × 1023 pBq |
| 25 Ci | 9.25 × 1023 pBq |
| 50 Ci | 1.85 × 1024 pBq |
| 100 Ci | 3.7 × 1024 pBq |