How to convert curies to millicuries
mCi = Ci × 1,000Multiply the value in curies by 1,000. To go the other way, multiply by 0.001 (or divide by 1,000).
A curie is larger than a millicurie: one curie contains 1,000 millicuries.
Worked examples
- 1 curie1 Ci × 1,000 = 1,000 mCi
- 5 curies5 Ci × 1,000 = 5,000 mCi
- 10 curies10 Ci × 1,000 = 10,000 mCi
- 20 curies20 Ci × 1,000 = 20,000 mCi
- 100 curies100 Ci × 1,000 = 100,000 mCi
Curies to millicuries conversion table
Values are calculated by the conversion engine and rounded to 8 significant figures.
| Curies (Ci) | Millicuries (mCi) |
|---|---|
| 0.1 Ci | 100 mCi |
| 0.25 Ci | 250 mCi |
| 0.5 Ci | 500 mCi |
| 1 Ci | 1,000 mCi |
| 2 Ci | 2,000 mCi |
| 3 Ci | 3,000 mCi |
| 4 Ci | 4,000 mCi |
| 5 Ci | 5,000 mCi |
| 6 Ci | 6,000 mCi |
| 7 Ci | 7,000 mCi |
| 8 Ci | 8,000 mCi |
| 9 Ci | 9,000 mCi |
| 10 Ci | 10,000 mCi |
| Curies (Ci) | Millicuries (mCi) |
|---|---|
| 12 Ci | 12,000 mCi |
| 15 Ci | 15,000 mCi |
| 20 Ci | 20,000 mCi |
| 25 Ci | 25,000 mCi |
| 30 Ci | 30,000 mCi |
| 40 Ci | 40,000 mCi |
| 50 Ci | 50,000 mCi |
| 75 Ci | 75,000 mCi |
| 100 Ci | 100,000 mCi |
| 250 Ci | 250,000 mCi |
| 500 Ci | 500,000 mCi |
| 1,000 Ci | 1,000,000 mCi |
About the units
Curie (Ci)
Exactly 3.7 × 10¹⁰ Bq. One curie equals 37,000,000,000 becquerels (Bq).
Millicurie (mCi)
The millicurie (mCi) is a unit of radioactivity. One millicurie equals 37,000,000 becquerels (Bq).
Frequently asked questions
How many millicuries are in one curie?
There are 1,000 millicuries in one curie, and this value is exact by definition.
How do I convert curies to millicuries?
Multiply the number of curies by 1,000. For example, 10 Ci × 1,000 = 10,000 mCi.
How many curies are in one millicurie?
One millicurie equals 0.001 curies. That is the reverse factor, 1 ÷ 1,000.
What is 10 curies in millicuries?
10 Ci = 10,000 mCi.
Is this Ci to mCi 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.