Convert GBq to Ci
Convert gigabecquerels to curies by entering a value below.
How to Convert Gigabecquerels to Curies
The gigabecquerel and curie are both units of radioactivity. By definition, 1 curie equals exactly 37 gigabecquerels. This means to convert gigabecquerels to curies, you divide by 37.
Formula
Step-by-Step Example
Convert 5 GBq to curies:
We need to convert gigabecquerels to curies
Since 1 Ci = 37 GBq, divide by 37
5 ÷ 37 = 0.1351351351
5 GBq = 0.1351351351 Ci
Gigabecquerel to Curie Conversion Table
Quick reference table for common gigabecquerel to curie conversions. Click any value for detailed calculation.
| Gigabecquerels (GBq) | Curies (Ci) |
|---|---|
| 1 GBq | 0.027027027 Ci |
| 2 GBq | 0.0540540541 Ci |
| 5 GBq | 0.1351351351 Ci |
| 10 GBq | 0.2702702703 Ci |
| 15 GBq | 0.4054054054 Ci |
| 20 GBq | 0.5405405405 Ci |
| 25 GBq | 0.6756756757 Ci |
| 50 GBq | 1.3513513514 Ci |
| 100 GBq | 2.7027027027 Ci |
About These Units
Gigabecquerel (GBq)
A gigabecquerel (GBq) equals 10⁹ becquerels or 27 millicuries. Used for cancer therapy doses (I-131: 3-7 GBq), industrial radiography sources (0.5-5 TBq), and brachytherapy seeds. Higher activity requires special handling.
Curie (Ci)
The curie (Ci) is the traditional unit of radioactivity, originally defined as the activity of 1 gram of Ra-226. One curie = 3.7×10¹⁰ decays/second = 37 GBq exactly. Named after Marie and Pierre Curie. Still used in US nuclear medicine and industry.
Frequently Asked Questions
How do I convert gigabecquerels to curies?
To convert gigabecquerels to curies, divide the value by 37. For example, 10 GBq = 0.2702702703 Ci.
How many curies are in 1 gigabecquerel?
1 gigabecquerel equals 0.027027027 curies.
What is the formula for gigabecquerels to curies?
The formula is: Ci = GBq ÷ 37.