Convert Rutherfords to Millicuries (Rd to mCi)
1 rutherford (Rd) = 0.02702702703 millicuries (mCi). 1 mCi = 37 Rd. Example: 15 Rd = 15 × 0.02702702703 = 0.4054054054 mCi.
Also searched as rutherfords to mCi, rutherfords in mCi, rutherfords into millicuries, Rd to mCi, Rd in millicuries, Rd into millicurie, rutherford to millicurie, Rd to millicuries converter and how many millicuries in a rutherford.
1 Rd = 0.02702702703 mCi
Type in either box. Scientific notation works: 1.5e-3.
Converting a list? Use the bulk rutherford to millicurie converter to paste a column from Excel.
How to Convert Rutherford to Millicurie
- 1 Rd = 0.02702702703 mCi
- 1 mCi = 37 Rd
- Example: convert 15 Rd to mCi: 15 Rd = 15 × 0.02702702703 mCi = 0.4054054054 mCi
Formula
mCi = Rd ÷ 37
Derivation from SI units:
- 1 Rd = 10⁶ Bq (obsolete).
- 1 mCi = 3.7 × 10⁷ Bq = 37 MBq.
- 1 Rd = 1000000 Bq ÷ 37000000 Bq per mCi = 0.02702702702703 mCi
Both units are defined exactly, so the factor is exact. Rutherford definition: rutherford; Millicurie definition: millicurie.
Worked examples
- A reading of 2 Rd converts to 0.05405405405 mCi.
2 Rd × 0.02702702703 = 0.05405405405 mCi - A value of 20 Rd is 0.5405405405 mCi.
20 Rd × 0.02702702703 = 0.5405405405 mCi
Rutherford to Millicurie conversion table
| Rutherfords (Rd) | Millicuries (mCi) |
|---|---|
| 0.1 Rd | 0.002702702703 mCi |
| 0.5 Rd | 0.01351351351 mCi |
| 1 Rd | 0.02702702703 mCi |
| 2 Rd | 0.05405405405 mCi |
| 5 Rd | 0.1351351351 mCi |
| 10 Rd | 0.2702702703 mCi |
| 20 Rd | 0.5405405405 mCi |
| 50 Rd | 1.351351351 mCi |
| 100 Rd | 2.702702703 mCi |
| 1000 Rd | 27.02702703 mCi |
Where it's used
Rutherfords are used for older nuclear physics literature, 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.
Rutherford to other radioactivity units
| Conversion | 1 Rd equals |
|---|---|
| rutherford to millicurie | 0.02702702703 mCi |
| rutherford to becquerel | 1000000 Bq |
| rutherford to curie | 0.00002702702703 Ci |
| rutherford to megabecquerel | 1 MBq |
| rutherford to picocurie | 27027027.03 pCi |
| rutherford to kilobecquerel | 1000 kBq |
| rutherford to gigabecquerel | 0.001 GBq |
| rutherford to microcurie | 27.02702703 µCi |
Show 3 more units
| rutherford to disintegration per minute | 60000000 dpm |
|---|---|
| rutherford to terabecquerel | 0.000001 TBq |
| rutherford to nanocurie | 27027.02703 nCi |
Frequently asked questions
How many millicuries are in 1 rutherford?
1 Rd = 0.02702702703 mCi.
How do I convert rutherfords to millicuries?
Multiply the value in Rd by 0.02702702703, or divide it by 37. For example, 15 Rd × 0.02702702703 = 0.4054054054 mCi.
Is the Rd to mCi conversion exact?
Yes. Both units are defined exactly, so the ratio is exact; its decimal form does not terminate and is shown here to 10 significant figures (more with the precision selector).
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 Rutherfords to Millicuries (Rd to mCi). Retrieved October 25, 2026, from https://scientificconverters.com/radioactivity/rutherfords-to-millicuries/
IEEE
Scientific Converters, "Convert Rutherfords to Millicuries (Rd to mCi)," scientificconverters.com. Accessed: Oct. 25, 2026. [Online]. Available: https://scientificconverters.com/radioactivity/rutherfords-to-millicuries/