Convert Gigabecquerels to Curies (GBq to Ci)
1 gigabecquerel (GBq) = 0.02702702703 curies (Ci). 1 Ci = 37 GBq. Example: 15 GBq = 15 × 0.02702702703 = 0.4054054054 Ci.
Also searched as gigabecquerels to Ci, gigabecquerels in Ci, gigabecquerels into curies, GBq to Ci, GBq in curies, GBq into curie, gigabecquerel to curie, GBq to curies converter and how many curies in a gigabecquerel.
1 GBq = 0.02702702703 Ci
Type in either box. Scientific notation works: 1.5e-3.
Converting a list? Use the bulk gigabecquerel to curie converter to paste a column from Excel.
How to Convert Gigabecquerel to Curie
- 1 GBq = 0.02702702703 Ci
- 1 Ci = 37 GBq
- Example: convert 15 GBq to Ci: 15 GBq = 15 × 0.02702702703 Ci = 0.4054054054 Ci
Formula
Ci = GBq ÷ 37
Derivation from SI units:
- 1 GBq = 10⁹ Bq.
- 1 Ci = 3.7 × 10¹⁰ Bq exactly (originally the activity of 1 g of radium-226).
- 1 GBq = 1000000000 Bq ÷ 37000000000 Bq per Ci = 0.02702702702703 Ci
Both units are defined exactly, so the factor is exact. Gigabecquerel definition: gigabecquerel; Curie definition: curie.
Worked examples
- A reading of 2 GBq converts to 0.05405405405 Ci.
2 GBq × 0.02702702703 = 0.05405405405 Ci - A value of 20 GBq is 0.5405405405 Ci.
20 GBq × 0.02702702703 = 0.5405405405 Ci
Gigabecquerel to Curie conversion table
| Gigabecquerels (GBq) | Curies (Ci) |
|---|---|
| 0.1 GBq | 0.002702702703 Ci |
| 0.5 GBq | 0.01351351351 Ci |
| 1 GBq | 0.02702702703 Ci |
| 2 GBq | 0.05405405405 Ci |
| 5 GBq | 0.1351351351 Ci |
| 10 GBq | 0.2702702703 Ci |
| 20 GBq | 0.5405405405 Ci |
| 50 GBq | 1.351351351 Ci |
| 100 GBq | 2.702702703 Ci |
| 1000 GBq | 27.02702703 Ci |
Where it's used
Gigabecquerels are used for radioiodine therapy (1–7 GBq), while curies appear in US nuclear regulation and licences. Both measure activity of a radioactive source, so the conversion is a fixed factor.
Gigabecquerel to other radioactivity units
| Conversion | 1 GBq equals |
|---|---|
| gigabecquerel to curie | 0.02702702703 Ci |
| gigabecquerel to becquerel | 1000000000 Bq |
| gigabecquerel to megabecquerel | 1000 MBq |
| gigabecquerel to millicurie | 27.02702703 mCi |
| gigabecquerel to picocurie | 27027027030 pCi |
| gigabecquerel to kilobecquerel | 1000000 kBq |
| gigabecquerel to microcurie | 27027.02703 µCi |
| gigabecquerel to disintegration per minute | 60000000000 dpm |
Show 3 more units
| gigabecquerel to terabecquerel | 0.001 TBq |
|---|---|
| gigabecquerel to nanocurie | 27027027.03 nCi |
| gigabecquerel to rutherford | 1000 Rd |
Frequently asked questions
How many curies are in 1 gigabecquerel?
1 GBq = 0.02702702703 Ci.
How do I convert gigabecquerels to curies?
Multiply the value in GBq by 0.02702702703, or divide it by 37. For example, 15 GBq × 0.02702702703 = 0.4054054054 Ci.
Is the GBq to Ci 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
- The International System of Units (SI), 9th edition (SI Brochure), Bureau International des Poids et Mesures , Table 4 (becquerel, gray, sievert, lux) and Table 2 (candela).
- 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 Gigabecquerels to Curies (GBq to Ci). Retrieved October 25, 2026, from https://scientificconverters.com/radioactivity/gigabecquerels-to-curies/
IEEE
Scientific Converters, "Convert Gigabecquerels to Curies (GBq to Ci)," scientificconverters.com. Accessed: Oct. 25, 2026. [Online]. Available: https://scientificconverters.com/radioactivity/gigabecquerels-to-curies/