Convert Picocuries to Millicuries (pCi to mCi)
1 picocurie (pCi) = 1 × 10⁻⁹ millicuries (mCi). 1 mCi = 1000000000 pCi. Example: 15 pCi = 15 × 1 × 10⁻⁹ = 1.5 × 10⁻⁸ mCi.
Also searched as picocuries to mCi, picocuries in mCi, picocuries into millicuries, pCi to mCi, pCi in millicuries, pCi into millicurie, picocurie to millicurie, pCi to millicuries converter and how many millicuries in a picocurie.
1 pCi = 1e-9 mCi
Type in either box. Scientific notation works: 1.5e-3.
Converting a list? Use the bulk picocurie to millicurie converter to paste a column from Excel.
How to Convert Picocurie to Millicurie
- 1 pCi = 1 × 10⁻⁹ mCi
- 1 mCi = 1000000000 pCi
- Example: convert 15 pCi to mCi: 15 pCi = 15 × 1 × 10⁻⁹ mCi = 1.5 × 10⁻⁸ mCi
Formula
mCi = pCi ÷ 1000000000
Derivation from SI units:
- 1 pCi = 0.037 Bq.
- 1 mCi = 3.7 × 10⁷ Bq = 37 MBq.
- 1 pCi = 0.037 Bq ÷ 37000000 Bq per mCi = 1 × 10⁻⁹ mCi
Both units are defined exactly, so the factor is exact. Picocurie definition: picocurie; Millicurie definition: millicurie.
Worked examples
- A reading of 4 pCi converts to 4 × 10⁻⁹ mCi.
4 pCi × 1 × 10⁻⁹ = 4 × 10⁻⁹ mCi - A value of 20 pCi is 2 × 10⁻⁸ mCi.
20 pCi × 1 × 10⁻⁹ = 2 × 10⁻⁸ mCi
Picocurie to Millicurie conversion table
| Picocuries (pCi) | Millicuries (mCi) |
|---|---|
| 0.4 pCi | 4 × 10⁻¹⁰ mCi |
| 1 pCi | 1 × 10⁻⁹ mCi |
| 2 pCi | 2 × 10⁻⁹ mCi |
| 4 pCi | 4 × 10⁻⁹ mCi |
| 8 pCi | 8 × 10⁻⁹ mCi |
| 10 pCi | 1 × 10⁻⁸ mCi |
| 20 pCi | 2 × 10⁻⁸ mCi |
| 50 pCi | 5 × 10⁻⁸ mCi |
| 100 pCi | 1 × 10⁻⁷ mCi |
| 1000 pCi | 0.000001 mCi |
Where it's used
Picocuries are used for radon in homes (pCi/L), 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.
Picocurie to other radioactivity units
| Conversion | 1 pCi equals |
|---|---|
| picocurie to millicurie | 1 × 10⁻⁹ mCi |
| picocurie to becquerel | 0.037 Bq |
| picocurie to curie | 1 × 10⁻¹² Ci |
| picocurie to megabecquerel | 3.7 × 10⁻⁸ MBq |
| picocurie to kilobecquerel | 0.000037 kBq |
| picocurie to gigabecquerel | 3.7 × 10⁻¹¹ GBq |
| picocurie to microcurie | 0.000001 µCi |
| picocurie to disintegration per minute | 2.22 dpm |
Show 3 more units
| picocurie to terabecquerel | 3.7 × 10⁻¹⁴ TBq |
|---|---|
| picocurie to nanocurie | 0.001 nCi |
| picocurie to rutherford | 3.7 × 10⁻⁸ Rd |
Frequently asked questions
How many millicuries are in 1 picocurie?
1 pCi = 1 × 10⁻⁹ mCi.
How do I convert picocuries to millicuries?
Multiply the value in pCi by 1 × 10⁻⁹, or divide it by 1000000000. For example, 15 pCi × 1 × 10⁻⁹ = 1.5 × 10⁻⁸ mCi.
Is the pCi to mCi conversion exact?
Yes. Both units are defined exactly, and 1 pCi is exactly 1 × 10⁻⁹ 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 Picocuries to Millicuries (pCi to mCi). Retrieved October 25, 2026, from https://scientificconverters.com/radioactivity/picocuries-to-millicuries/
IEEE
Scientific Converters, "Convert Picocuries to Millicuries (pCi to mCi)," scientificconverters.com. Accessed: Oct. 25, 2026. [Online]. Available: https://scientificconverters.com/radioactivity/picocuries-to-millicuries/