Convert Millicuries to Microcuries (mCi to µCi)
1 millicurie (mCi) = 1000 microcuries (µCi). 1 µCi = 0.001 mCi. Example: 15 mCi = 15 × 1000 = 15000 µCi.
Also searched as millicuries to µCi, millicuries in µCi, millicuries into microcuries, mCi to µCi, mCi in microcuries, mCi into microcurie, millicurie to microcurie, mCi to microcuries converter and how many microcuries in a millicurie.
1 mCi = 1000 µCi
Type in either box. Scientific notation works: 1.5e-3.
Converting a list? Use the bulk millicurie to microcurie converter to paste a column from Excel.
How to Convert Millicurie to Microcurie
- 1 mCi = 1000 µCi
- 1 µCi = 0.001 mCi
- Example: convert 15 mCi to µCi: 15 mCi = 15 × 1000 µCi = 15000 µCi
Formula
µCi = mCi × 1000
Derivation from SI units:
- 1 mCi = 3.7 × 10⁷ Bq = 37 MBq.
- 1 µCi = 3.7 × 10⁴ Bq = 37 kBq.
- 1 mCi = 37000000 Bq ÷ 37000 Bq per µCi = 1000 µCi
Both units are defined exactly, so the factor is exact. Millicurie definition: millicurie; Microcurie definition: microcurie.
Worked examples
- A reading of 15 mCi converts to 15000 µCi.
15 mCi × 1000 = 15000 µCi - A value of 30 mCi is 30000 µCi.
30 mCi × 1000 = 30000 µCi
Millicurie to Microcurie conversion table
| Millicuries (mCi) | Microcuries (µCi) |
|---|---|
| 1 mCi | 1000 µCi |
| 5 mCi | 5000 µCi |
| 10 mCi | 10000 µCi |
| 15 mCi | 15000 µCi |
| 20 mCi | 20000 µCi |
| 25 mCi | 25000 µCi |
| 30 mCi | 30000 µCi |
| 50 mCi | 50000 µCi |
| 100 mCi | 100000 µCi |
| 200 mCi | 200000 µCi |
Where it's used
Millicuries are used for US radiopharmaceutical doses (e.g. 10 mCi FDG), while microcuries appear in check and calibration sources. Both measure activity of a radioactive source, so the conversion is a fixed factor.
Millicurie to other radioactivity units
| Conversion | 1 mCi equals |
|---|---|
| millicurie to microcurie | 1000 µCi |
| millicurie to becquerel | 37000000 Bq |
| millicurie to curie | 0.001 Ci |
| millicurie to megabecquerel | 37 MBq |
| millicurie to picocurie | 1000000000 pCi |
| millicurie to kilobecquerel | 37000 kBq |
| millicurie to gigabecquerel | 0.037 GBq |
| millicurie to disintegration per minute | 2220000000 dpm |
Show 3 more units
| millicurie to terabecquerel | 0.000037 TBq |
|---|---|
| millicurie to nanocurie | 1000000 nCi |
| millicurie to rutherford | 37 Rd |
Frequently asked questions
How many microcuries are in 1 millicurie?
1 mCi = 1000 µCi.
How do I convert millicuries to microcuries?
Multiply the value in mCi by 1000. For example, 15 mCi × 1000 = 15000 µCi.
Is the mCi to µCi conversion exact?
Yes. Both units are defined exactly, and 1 mCi is exactly 1000 µCi.
Sources
- Guide for the Use of the International System of Units (SI), NIST Special Publication 811, 2008 Edition, National Institute of Standards and Technology , Appendix B.8, "curie".
Last reviewed: . Factors are stored exactly and computed with 50-digit decimal arithmetic. See how we verify conversion factors.
Cite this page
APA
Scientific Converters. (2026, October 15). Convert Millicuries to Microcuries (mCi to µCi). Retrieved October 25, 2026, from https://scientificconverters.com/radioactivity/millicuries-to-microcuries/
IEEE
Scientific Converters, "Convert Millicuries to Microcuries (mCi to µCi)," scientificconverters.com. Accessed: Oct. 25, 2026. [Online]. Available: https://scientificconverters.com/radioactivity/millicuries-to-microcuries/