Convert Picocurie to Curie
Enter the number of picocuries that you want to convert to curies.
How to Convert Picocuries to Curies
The picocurie and curie are both units of radioactivity. By definition, 1 curie equals exactly 1e12 picocuries. This means to convert picocuries to curies, you divide by 1e12.
Formula
Step-by-Step Example
Convert 5 pCi to curies:
We need to convert picocuries to curies
Since 1 Ci = 1e12 pCi, divide by 1e12
5 ÷ 1e12 = 5e-12
5 pCi = 5e-12 Ci
Picocurie to Curie Conversion Table
Quick reference table for common picocurie to curie conversions. Click any value for detailed calculation.
| Picocuries (pCi) | Curies (Ci) |
|---|---|
| 0.1 pCi | 1e-13 Ci |
| 0.5 pCi | 5e-13 Ci |
| 1 pCi | 1e-12 Ci |
| 2 pCi | 2e-12 Ci |
| 5 pCi | 5e-12 Ci |
| 10 pCi | 1e-11 Ci |
| 25 pCi | 2.5e-11 Ci |
| 50 pCi | 5e-11 Ci |
| 100 pCi | 1e-10 Ci |
About These Units
Picocurie (pCi)
A picocurie (pCi) equals 10⁻¹² curie or 0.037 Bq. Standard US unit for radon: EPA action level is 4 pCi/L. Drinking water: 15 pCi/L alpha limit. One pCi = 2.22 decays per minute. Used extensively in US environmental regulations.
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 picocuries to curies?
To convert picocuries to curies, divide the value by 1e12. For example, 10 pCi = 1e-11 Ci.
How many curies are in 1 picocurie?
1 picocurie equals 1e-12 curies.
What is the formula for picocuries to curies?
The formula is: Ci = pCi ÷ 1e12.