Convert Millicuries to Rutherfords (mCi to Rd)
1 millicurie (mCi) = 37 rutherfords (Rd). 1 Rd = 0.02702702703 mCi. Example: 15 mCi = 15 × 37 = 555 Rd.
Also searched as millicuries to Rd, millicuries in Rd, millicuries into rutherfords, mCi to Rd, mCi in rutherfords, mCi into rutherford, millicurie to rutherford, mCi to rutherfords converter and how many rutherfords in a millicurie.
1 mCi = 37 Rd
Type in either box. Scientific notation works: 1.5e-3.
Converting a list? Use the bulk millicurie to rutherford converter to paste a column from Excel.
How to Convert Millicurie to Rutherford
- 1 mCi = 37 Rd
- 1 Rd = 0.02702702703 mCi
- Example: convert 15 mCi to Rd: 15 mCi = 15 × 37 Rd = 555 Rd
Formula
Rd = mCi × 37
Derivation from SI units:
- 1 mCi = 3.7 × 10⁷ Bq = 37 MBq.
- 1 Rd = 10⁶ Bq (obsolete).
- 1 mCi = 37000000 Bq ÷ 1000000 Bq per Rd = 37 Rd
Both units are defined exactly, so the factor is exact. Millicurie definition: millicurie; Rutherford definition: rutherford.
Worked examples
- A reading of 15 mCi converts to 555 Rd.
15 mCi × 37 = 555 Rd - A value of 30 mCi is 1110 Rd.
30 mCi × 37 = 1110 Rd
Millicurie to Rutherford conversion table
| Millicuries (mCi) | Rutherfords (Rd) |
|---|---|
| 1 mCi | 37 Rd |
| 5 mCi | 185 Rd |
| 10 mCi | 370 Rd |
| 15 mCi | 555 Rd |
| 20 mCi | 740 Rd |
| 25 mCi | 925 Rd |
| 30 mCi | 1110 Rd |
| 50 mCi | 1850 Rd |
| 100 mCi | 3700 Rd |
| 200 mCi | 7400 Rd |
Where it's used
Millicuries are used for US radiopharmaceutical doses (e.g. 10 mCi FDG), while rutherfords appear in older nuclear physics literature. 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 rutherford | 37 Rd |
| 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 microcurie | 1000 µCi |
Show 3 more units
| millicurie to disintegration per minute | 2220000000 dpm |
|---|---|
| millicurie to terabecquerel | 0.000037 TBq |
| millicurie to nanocurie | 1000000 nCi |
Frequently asked questions
How many rutherfords are in 1 millicurie?
1 mCi = 37 Rd.
How do I convert millicuries to rutherfords?
Multiply the value in mCi by 37. For example, 15 mCi × 37 = 555 Rd.
Is the mCi to Rd conversion exact?
Yes. Both units are defined exactly, and 1 mCi is exactly 37 Rd.
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 Rutherfords (mCi to Rd). Retrieved October 25, 2026, from https://scientificconverters.com/radioactivity/millicuries-to-rutherfords/
IEEE
Scientific Converters, "Convert Millicuries to Rutherfords (mCi to Rd)," scientificconverters.com. Accessed: Oct. 25, 2026. [Online]. Available: https://scientificconverters.com/radioactivity/millicuries-to-rutherfords/