Convert Picocuries to Rutherfords (pCi to Rd)
1 picocurie (pCi) = 3.7 × 10⁻⁸ rutherfords (Rd). 1 Rd = 27027027.03 pCi. Example: 15 pCi = 15 × 3.7 × 10⁻⁸ = 5.55 × 10⁻⁷ Rd.
Also searched as picocuries to Rd, picocuries in Rd, picocuries into rutherfords, pCi to Rd, pCi in rutherfords, pCi into rutherford, picocurie to rutherford, pCi to rutherfords converter and how many rutherfords in a picocurie.
1 pCi = 3.7e-8 Rd
Type in either box. Scientific notation works: 1.5e-3.
Converting a list? Use the bulk picocurie to rutherford converter to paste a column from Excel.
How to Convert Picocurie to Rutherford
- 1 pCi = 3.7 × 10⁻⁸ Rd
- 1 Rd = 27027027.03 pCi
- Example: convert 15 pCi to Rd: 15 pCi = 15 × 3.7 × 10⁻⁸ Rd = 5.55 × 10⁻⁷ Rd
Formula
Rd = pCi × 3.7 × 10⁻⁸
or Rd = pCi ÷ 27027027.02703
Derivation from SI units:
- 1 pCi = 0.037 Bq.
- 1 Rd = 10⁶ Bq (obsolete).
- 1 pCi = 0.037 Bq ÷ 1000000 Bq per Rd = 3.7 × 10⁻⁸ Rd
Both units are defined exactly, so the factor is exact. Picocurie definition: picocurie; Rutherford definition: rutherford.
Worked examples
- A reading of 4 pCi converts to 1.48 × 10⁻⁷ Rd.
4 pCi × 3.7 × 10⁻⁸ = 1.48 × 10⁻⁷ Rd - A value of 20 pCi is 7.4 × 10⁻⁷ Rd.
20 pCi × 3.7 × 10⁻⁸ = 7.4 × 10⁻⁷ Rd
Picocurie to Rutherford conversion table
| Picocuries (pCi) | Rutherfords (Rd) |
|---|---|
| 0.4 pCi | 1.48 × 10⁻⁸ Rd |
| 1 pCi | 3.7 × 10⁻⁸ Rd |
| 2 pCi | 7.4 × 10⁻⁸ Rd |
| 4 pCi | 1.48 × 10⁻⁷ Rd |
| 8 pCi | 2.96 × 10⁻⁷ Rd |
| 10 pCi | 3.7 × 10⁻⁷ Rd |
| 20 pCi | 7.4 × 10⁻⁷ Rd |
| 50 pCi | 0.00000185 Rd |
| 100 pCi | 0.0000037 Rd |
| 1000 pCi | 0.000037 Rd |
Where it's used
Picocuries are used for radon in homes (pCi/L), while rutherfords appear in older nuclear physics literature. 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 rutherford | 3.7 × 10⁻⁸ Rd |
| picocurie to becquerel | 0.037 Bq |
| picocurie to curie | 1 × 10⁻¹² Ci |
| picocurie to megabecquerel | 3.7 × 10⁻⁸ MBq |
| picocurie to millicurie | 1 × 10⁻⁹ mCi |
| picocurie to kilobecquerel | 0.000037 kBq |
| picocurie to gigabecquerel | 3.7 × 10⁻¹¹ GBq |
| picocurie to microcurie | 0.000001 µCi |
Show 3 more units
| picocurie to disintegration per minute | 2.22 dpm |
|---|---|
| picocurie to terabecquerel | 3.7 × 10⁻¹⁴ TBq |
| picocurie to nanocurie | 0.001 nCi |
Frequently asked questions
How many rutherfords are in 1 picocurie?
1 pCi = 3.7 × 10⁻⁸ Rd.
How do I convert picocuries to rutherfords?
Multiply the value in pCi by 3.7 × 10⁻⁸, or divide it by 27027027.03. For example, 15 pCi × 3.7 × 10⁻⁸ = 5.55 × 10⁻⁷ Rd.
Is the pCi to Rd conversion exact?
Yes. Both units are defined exactly, and 1 pCi is exactly 3.7 × 10⁻⁸ 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 Picocuries to Rutherfords (pCi to Rd). Retrieved October 25, 2026, from https://scientificconverters.com/radioactivity/picocuries-to-rutherfords/
IEEE
Scientific Converters, "Convert Picocuries to Rutherfords (pCi to Rd)," scientificconverters.com. Accessed: Oct. 25, 2026. [Online]. Available: https://scientificconverters.com/radioactivity/picocuries-to-rutherfords/