Convert Curies to Nanocuries (Ci to nCi)
1 curie (Ci) = 1000000000 nanocuries (nCi). 1 nCi = 1 × 10⁻⁹ Ci. Example: 15 Ci = 15 × 1000000000 = 15000000000 nCi.
Also searched as curies to nCi, curies in nCi, curies into nanocuries, Ci to nCi, Ci in nanocuries, Ci into nanocurie, curie to nanocurie, Ci to nanocuries converter and how many nanocuries in a curie.
1 Ci = 1000000000 nCi
Type in either box. Scientific notation works: 1.5e-3.
Converting a list? Use the bulk curie to nanocurie converter to paste a column from Excel.
How to Convert Curie to Nanocurie
- 1 Ci = 1000000000 nCi
- 1 nCi = 1 × 10⁻⁹ Ci
- Example: convert 15 Ci to nCi: 15 Ci = 15 × 1000000000 nCi = 15000000000 nCi
Formula
nCi = Ci × 1000000000
Derivation from SI units:
- 1 Ci = 3.7 × 10¹⁰ Bq exactly (originally the activity of 1 g of radium-226).
- 1 nCi = 37 Bq.
- 1 Ci = 37000000000 Bq ÷ 37 Bq per nCi = 1000000000 nCi
Both units are defined exactly, so the factor is exact. Curie definition: curie; Nanocurie definition: nanocurie.
Worked examples
- A reading of 2 Ci converts to 2000000000 nCi.
2 Ci × 1000000000 = 2000000000 nCi - A value of 20 Ci is 20000000000 nCi.
20 Ci × 1000000000 = 20000000000 nCi
Curie to Nanocurie conversion table
| Curies (Ci) | Nanocuries (nCi) |
|---|---|
| 0.1 Ci | 100000000 nCi |
| 0.5 Ci | 500000000 nCi |
| 1 Ci | 1000000000 nCi |
| 2 Ci | 2000000000 nCi |
| 5 Ci | 5000000000 nCi |
| 10 Ci | 10000000000 nCi |
| 20 Ci | 20000000000 nCi |
| 50 Ci | 50000000000 nCi |
| 100 Ci | 100000000000 nCi |
| 1000 Ci | 1000000000000 nCi |
Where it's used
Curies are used for US nuclear regulation and licences, while nanocuries appear in environmental sample activities. Both measure activity of a radioactive source, so the conversion is a fixed factor.
Curie to other radioactivity units
| Conversion | 1 Ci equals |
|---|---|
| curie to nanocurie | 1000000000 nCi |
| curie to becquerel | 37000000000 Bq |
| curie to megabecquerel | 37000 MBq |
| curie to millicurie | 1000 mCi |
| curie to picocurie | 1000000000000 pCi |
| curie to kilobecquerel | 37000000 kBq |
| curie to gigabecquerel | 37 GBq |
| curie to microcurie | 1000000 µCi |
Show 3 more units
| curie to disintegration per minute | 2220000000000 dpm |
|---|---|
| curie to terabecquerel | 0.037 TBq |
| curie to rutherford | 37000 Rd |
Frequently asked questions
How many nanocuries are in 1 curie?
1 Ci = 1000000000 nCi.
How do I convert curies to nanocuries?
Multiply the value in Ci by 1000000000. For example, 15 Ci × 1000000000 = 15000000000 nCi.
Is the Ci to nCi conversion exact?
Yes. Both units are defined exactly, and 1 Ci is exactly 1000000000 nCi.
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 Curies to Nanocuries (Ci to nCi). Retrieved October 25, 2026, from https://scientificconverters.com/radioactivity/curies-to-nanocuries/
IEEE
Scientific Converters, "Convert Curies to Nanocuries (Ci to nCi)," scientificconverters.com. Accessed: Oct. 25, 2026. [Online]. Available: https://scientificconverters.com/radioactivity/curies-to-nanocuries/