Convert Microcurie to Millicurie
Input the number of microcuries you want to convert to millicuries.
How to Convert Microcuries to Millicuries
The microcurie and millicurie are both units of radioactivity. By definition, 1 millicurie equals exactly 1e12 microcuries. This means to convert microcuries to millicuries, you divide by 1e12.
Formula
Step-by-Step Example
Convert 5 μCi to millicuries:
We need to convert microcuries to millicuries
Since 1 mCi = 1e12 μCi, divide by 1e12
5 ÷ 1e12 = 5e-12
5 μCi = 5e-12 mCi
Microcurie to Millicurie Conversion Table
Quick reference table for common microcurie to millicurie conversions. Click any value for detailed calculation.
| Microcuries (μCi) | Millicuries (mCi) |
|---|---|
| 0.1 μCi | 1e-13 mCi |
| 0.5 μCi | 5e-13 mCi |
| 1 μCi | 1e-12 mCi |
| 2 μCi | 2e-12 mCi |
| 5 μCi | 5e-12 mCi |
| 10 μCi | 1e-11 mCi |
| 25 μCi | 2.5e-11 mCi |
| 50 μCi | 5e-11 mCi |
| 100 μCi | 1e-10 mCi |
About These Units
Microcurie (μCi)
A microcurie (μCi) equals 10⁻⁶ curie or 37 kBq. Common for laboratory tracer experiments, radioactive check sources (1-10 μCi), exempt quantity limits, and calibration standards. One microcurie = 2.22 million disintegrations per minute.
Millicurie (mCi)
A millicurie (mCi) equals 0.001 curie or 37 MBq. Standard unit for nuclear medicine imaging in US: thyroid uptake 0.1-0.2 mCi, bone scan 20-30 mCi, cardiac stress test 25-35 mCi. Laboratory calibration sources: 1-10 mCi typical.
Frequently Asked Questions
How do I convert microcuries to millicuries?
To convert microcuries to millicuries, divide the value by 1e12. For example, 10 μCi = 1e-11 mCi.
How many millicuries are in 1 microcurie?
1 microcurie equals 1e-12 millicuries.
What is the formula for microcuries to millicuries?
The formula is: mCi = μCi ÷ 1e12.