Convert Curie to Kilocurie
Enter the number of curies that you want to convert to kilocuries.
How to Convert Curies to Kilocuries
The curie and kilocurie are both units of radioactivity. By definition, 1 kilocurie equals exactly 1000 curies. This means to convert curies to kilocuries, you divide by 1000.
Formula
Step-by-Step Example
Convert 5 Ci to kilocuries:
We need to convert curies to kilocuries
Since 1 kCi = 1000 Ci, divide by 1000
5 ÷ 1000 = 0.005
5 Ci = 0.005 kCi
Curie to Kilocurie Conversion Table
Quick reference table for common curie to kilocurie conversions. Click any value for detailed calculation.
| Curies (Ci) | Kilocuries (kCi) |
|---|---|
| 0.1 Ci | 0.0001 kCi |
| 0.5 Ci | 0.0005 kCi |
| 1 Ci | 0.001 kCi |
| 2 Ci | 0.002 kCi |
| 5 Ci | 0.005 kCi |
| 10 Ci | 0.01 kCi |
| 25 Ci | 0.025 kCi |
| 50 Ci | 0.05 kCi |
| 100 Ci | 0.1 kCi |
About These Units
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.
Kilocurie (kCi)
A kilocurie (kCi) equals 1,000 curies or 37 TBq. Found in gamma irradiation facilities, high-level waste, and large medical sterilizers. Cobalt-60 panoramic irradiators: 0.5-2 MCi. Requires substantial shielding and remote handling.
Frequently Asked Questions
How do I convert curies to kilocuries?
To convert curies to kilocuries, divide the value by 1000. For example, 10 Ci = 0.01 kCi.
How many kilocuries are in 1 curie?
1 curie equals 0.001 kilocuries.
What is the formula for curies to kilocuries?
The formula is: kCi = Ci ÷ 1000.