Convert Curies to Gigacuries
Convert Curies (Ci) to Gigacuries (GCi) instantly and accurately.
Conversion Formula
GCi = Ci × 1.000000000e-9
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 Gigacuries
The gigacurie (GCi) equals 3.7 × 10¹⁹ Bq. The total fission product inventory of a 1 GWe nuclear power reactor at equilibrium is ~0.5 GCi; global spent fuel inventories worldwide exceed 10 GCi; total reactor-produced tritium in the world's oceans is estimated at ~1 GCi. 1 GCi = 3.7 × 10¹⁹ Bq.
Quick Reference Table
| Curies (Ci) | Gigacuries (GCi) |
|---|---|
| 1 Ci | 1 × 10-9 GCi |
| 2 Ci | 2 × 10-9 GCi |
| 5 Ci | 5 × 10-9 GCi |
| 10 Ci | 1 × 10-8 GCi |
| 25 Ci | 2.5 × 10-8 GCi |
| 50 Ci | 5 × 10-8 GCi |
| 100 Ci | 1 × 10-7 GCi |