Convert Curies to Gigabecquerels (Ci to GBq)
1 curie (Ci) = 37 gigabecquerels (GBq). 1 GBq = 0.02702702703 Ci. Example: 15 Ci = 15 × 37 = 555 GBq.
Also searched as curies to GBq, curies in GBq, curies into gigabecquerels, Ci to GBq, Ci in gigabecquerels, Ci into gigabecquerel, curie to gigabecquerel, Ci to gigabecquerels converter and how many gigabecquerels in a curie.
1 Ci = 37 GBq
Type in either box. Scientific notation works: 1.5e-3.
Converting a list? Use the bulk curie to gigabecquerel converter to paste a column from Excel.
How to Convert Curie to Gigabecquerel
- 1 Ci = 37 GBq
- 1 GBq = 0.02702702703 Ci
- Example: convert 15 Ci to GBq: 15 Ci = 15 × 37 GBq = 555 GBq
Formula
GBq = Ci × 37
Derivation from SI units:
- 1 Ci = 3.7 × 10¹⁰ Bq exactly (originally the activity of 1 g of radium-226).
- 1 GBq = 10⁹ Bq.
- 1 Ci = 37000000000 Bq ÷ 1000000000 Bq per GBq = 37 GBq
Both units are defined exactly, so the factor is exact. Curie definition: curie; Gigabecquerel definition: gigabecquerel.
Worked examples
- A reading of 2 Ci converts to 74 GBq.
2 Ci × 37 = 74 GBq - A value of 20 Ci is 740 GBq.
20 Ci × 37 = 740 GBq
Curie to Gigabecquerel conversion table
| Curies (Ci) | Gigabecquerels (GBq) |
|---|---|
| 0.1 Ci | 3.7 GBq |
| 0.5 Ci | 18.5 GBq |
| 1 Ci | 37 GBq |
| 2 Ci | 74 GBq |
| 5 Ci | 185 GBq |
| 10 Ci | 370 GBq |
| 20 Ci | 740 GBq |
| 50 Ci | 1850 GBq |
| 100 Ci | 3700 GBq |
| 1000 Ci | 37000 GBq |
Where it's used
Curies are used for US nuclear regulation and licences, while gigabecquerels appear in radioiodine therapy (1–7 GBq). 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 gigabecquerel | 37 GBq |
| 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 microcurie | 1000000 µCi |
| curie to disintegration per minute | 2220000000000 dpm |
Show 3 more units
| curie to terabecquerel | 0.037 TBq |
|---|---|
| curie to nanocurie | 1000000000 nCi |
| curie to rutherford | 37000 Rd |
Frequently asked questions
How many gigabecquerels are in 1 curie?
1 Ci = 37 GBq.
How do I convert curies to gigabecquerels?
Multiply the value in Ci by 37. For example, 15 Ci × 37 = 555 GBq.
Is the Ci to GBq conversion exact?
Yes. Both units are defined exactly, and 1 Ci is exactly 37 GBq.
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".
- 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).
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 Gigabecquerels (Ci to GBq). Retrieved October 25, 2026, from https://scientificconverters.com/radioactivity/curies-to-gigabecquerels/
IEEE
Scientific Converters, "Convert Curies to Gigabecquerels (Ci to GBq)," scientificconverters.com. Accessed: Oct. 25, 2026. [Online]. Available: https://scientificconverters.com/radioactivity/curies-to-gigabecquerels/