Convert Curies to Kilobecquerels
Convert Curies (Ci) to Kilobecquerels (kBq) instantly and accurately.
Conversion Formula
kBq = Ci × 37000000
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 Kilobecquerels
The kilobecquerel (kBq) equals 10³ Bq. Food safety authorities report ¹³⁷Cs contamination in kBq/kg (Codex Alimentarius and EC 733/2008 limits); ¹²⁵I tracers in radioimmunoassay kits are typically 3.7-18.5 kBq per well. 1 kBq = 10³ Bq = 1000 Bq.
Quick Reference Table
| Curies (Ci) | Kilobecquerels (kBq) |
|---|---|
| 1 Ci | 37000000 kBq |
| 2 Ci | 74000000 kBq |
| 5 Ci | 185000000 kBq |
| 10 Ci | 370000000 kBq |
| 25 Ci | 925000000 kBq |
| 50 Ci | 1.85 × 109 kBq |
| 100 Ci | 3.7 × 109 kBq |