How to convert millicuries to curies
Ci = mCi × 0.001Multiply the value in millicuries by 0.001. To go the other way, multiply by 1,000 (or divide by 0.001).
A millicurie is smaller than a curie: it takes 1,000 millicuries to make one curie.
Worked examples
- 1 millicurie1 mCi × 0.001 = 0.001 Ci
- 5 millicuries5 mCi × 0.001 = 0.005 Ci
- 10 millicuries10 mCi × 0.001 = 0.01 Ci
- 20 millicuries20 mCi × 0.001 = 0.02 Ci
- 100 millicuries100 mCi × 0.001 = 0.1 Ci
Millicuries to curies conversion table
Values are calculated by the conversion engine and rounded to 8 significant figures.
| Millicuries (mCi) | Curies (Ci) |
|---|---|
| 0.1 mCi | 0.0001 Ci |
| 0.25 mCi | 0.00025 Ci |
| 0.5 mCi | 0.0005 Ci |
| 1 mCi | 0.001 Ci |
| 2 mCi | 0.002 Ci |
| 3 mCi | 0.003 Ci |
| 4 mCi | 0.004 Ci |
| 5 mCi | 0.005 Ci |
| 6 mCi | 0.006 Ci |
| 7 mCi | 0.007 Ci |
| 8 mCi | 0.008 Ci |
| 9 mCi | 0.009 Ci |
| 10 mCi | 0.01 Ci |
| Millicuries (mCi) | Curies (Ci) |
|---|---|
| 12 mCi | 0.012 Ci |
| 15 mCi | 0.015 Ci |
| 20 mCi | 0.02 Ci |
| 25 mCi | 0.025 Ci |
| 30 mCi | 0.03 Ci |
| 40 mCi | 0.04 Ci |
| 50 mCi | 0.05 Ci |
| 75 mCi | 0.075 Ci |
| 100 mCi | 0.1 Ci |
| 250 mCi | 0.25 Ci |
| 500 mCi | 0.5 Ci |
| 1,000 mCi | 1 Ci |
About the units
Millicurie (mCi)
The millicurie (mCi) is a unit of radioactivity. One millicurie equals 37,000,000 becquerels (Bq).
Curie (Ci)
Exactly 3.7 × 10¹⁰ Bq. One curie equals 37,000,000,000 becquerels (Bq).
Frequently asked questions
How many curies are in one millicurie?
There are 0.001 curies in one millicurie, and this value is exact by definition.
How do I convert millicuries to curies?
Multiply the number of millicuries by 0.001. For example, 10 mCi × 0.001 = 0.01 Ci.
How many millicuries are in one curie?
One curie equals 1,000 millicuries. That is the reverse factor, 1 ÷ 0.001.
What is 10 millicuries in curies?
10 mCi = 0.01 Ci.
Is this mCi to Ci converter accurate?
Yes. Both units are defined exactly in terms of SI units, so the conversion factor is exact; results are shown to 12 significant figures by default and you can change precision in the converter. Calculations run in your browser using the same tested engine that generated this page.