Convert Nanocuries to Millicuries (nCi to mCi)
1 nanocurie (nCi) = 0.000001 millicuries (mCi). 1 mCi = 1000000 nCi. Example: 15 nCi = 15 × 0.000001 = 0.000015 mCi.
Also searched as nanocuries to mCi, nanocuries in mCi, nanocuries into millicuries, nCi to mCi, nCi in millicuries, nCi into millicurie, nanocurie to millicurie, nCi to millicuries converter and how many millicuries in a nanocurie.
1 nCi = 0.000001 mCi
Type in either box. Scientific notation works: 1.5e-3.
Converting a list? Use the bulk nanocurie to millicurie converter to paste a column from Excel.
How to Convert Nanocurie to Millicurie
- 1 nCi = 0.000001 mCi
- 1 mCi = 1000000 nCi
- Example: convert 15 nCi to mCi: 15 nCi = 15 × 0.000001 mCi = 0.000015 mCi
Formula
mCi = nCi ÷ 1000000
Derivation from SI units:
- 1 nCi = 37 Bq.
- 1 mCi = 3.7 × 10⁷ Bq = 37 MBq.
- 1 nCi = 37 Bq ÷ 37000000 Bq per mCi = 0.000001 mCi
Both units are defined exactly, so the factor is exact. Nanocurie definition: nanocurie; Millicurie definition: millicurie.
Worked examples
- A reading of 2 nCi converts to 0.000002 mCi.
2 nCi × 0.000001 = 0.000002 mCi - A value of 20 nCi is 0.00002 mCi.
20 nCi × 0.000001 = 0.00002 mCi
Nanocurie to Millicurie conversion table
| Nanocuries (nCi) | Millicuries (mCi) |
|---|---|
| 0.1 nCi | 1 × 10⁻⁷ mCi |
| 0.5 nCi | 5 × 10⁻⁷ mCi |
| 1 nCi | 0.000001 mCi |
| 2 nCi | 0.000002 mCi |
| 5 nCi | 0.000005 mCi |
| 10 nCi | 0.00001 mCi |
| 20 nCi | 0.00002 mCi |
| 50 nCi | 0.00005 mCi |
| 100 nCi | 0.0001 mCi |
| 1000 nCi | 0.001 mCi |
Where it's used
Nanocuries are used for environmental sample activities, while millicuries appear in US radiopharmaceutical doses (e.g. 10 mCi FDG). Both measure activity of a radioactive source, so the conversion is a fixed factor.
Nanocurie to other radioactivity units
| Conversion | 1 nCi equals |
|---|---|
| nanocurie to millicurie | 0.000001 mCi |
| nanocurie to becquerel | 37 Bq |
| nanocurie to curie | 1 × 10⁻⁹ Ci |
| nanocurie to megabecquerel | 0.000037 MBq |
| nanocurie to picocurie | 1000 pCi |
| nanocurie to kilobecquerel | 0.037 kBq |
| nanocurie to gigabecquerel | 3.7 × 10⁻⁸ GBq |
| nanocurie to microcurie | 0.001 µCi |
Show 3 more units
| nanocurie to disintegration per minute | 2220 dpm |
|---|---|
| nanocurie to terabecquerel | 3.7 × 10⁻¹¹ TBq |
| nanocurie to rutherford | 0.000037 Rd |
Frequently asked questions
How many millicuries are in 1 nanocurie?
1 nCi = 0.000001 mCi.
How do I convert nanocuries to millicuries?
Multiply the value in nCi by 0.000001, or divide it by 1000000. For example, 15 nCi × 0.000001 = 0.000015 mCi.
Is the nCi to mCi conversion exact?
Yes. Both units are defined exactly, and 1 nCi is exactly 0.000001 mCi.
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 Nanocuries to Millicuries (nCi to mCi). Retrieved October 25, 2026, from https://scientificconverters.com/radioactivity/nanocuries-to-millicuries/
IEEE
Scientific Converters, "Convert Nanocuries to Millicuries (nCi to mCi)," scientificconverters.com. Accessed: Oct. 25, 2026. [Online]. Available: https://scientificconverters.com/radioactivity/nanocuries-to-millicuries/