Radioactivity
GBqtoCi
Convert gigabecquerels (GBq) to curies (Ci).
Factor1 GBq = 0.02702703 Ci
Converter
GBq
Accepts numbers or expressions, e.g. 150 + 14.7
Result
Ci
Rendered to 6 significant figures.
Formula
Formula
Ci = GBq × 0.02702703
Multiply any value in gigabecquerels by 0.02702703 to obtain the value in curies.
Worked example
Convert 37 GBq to Ci.
- 01Start with 37 GBq.
- 02Multiply by the conversion factor: 37 × 0.02702703 = 1 Ci.
Result37 GBq = 1 Ci
Conversion table
| GBq | Ci |
|---|---|
| 1 | 0.027027 |
| 2 | 0.054054 |
| 5 | 0.13514 |
| 10 | 0.27027 |
| 20 | 0.54054 |
| 50 | 1.3514 |
| 100 | 2.7027 |
| 200 | 5.4054 |
| 500 | 13.514 |
| 1000 | 27.027 |
Reference values rounded to 5 significant figures for display.
FAQ
What is the conversion factor from GBq to Ci?
1 GBq equals 0.02702703 Ci. To convert, multiply the value in gigabecquerels by 0.02702703.
How do I convert 1 GBq to Ci?
1 GBq = 0.027027 Ci. For any value, multiply by 0.02702703.
How do I convert Ci back to GBq?
Divide by the same factor — or equivalently, multiply by 37. So 1 Ci = 37 GBq.
When would I need to convert gigabecquerel to curie?
Radioactivity (activity) conversions between GBq and Ci are routine in health physics, nuclear medicine ordering, environmental monitoring, radiopharmacy and reactor/accelerator-source documentation. The becquerel (Bq) is the SI unit; the curie (Ci) is the legacy unit (1 Ci ≡ 3.7×10¹⁰ Bq exactly). This category is strictly activity (decays per second) — it does NOT cover absorbed dose (Gy, rad), dose equivalent (Sv, rem), exposure or dose rate, all of which are different physical quantities and live in separate categories.
Is the conversion exact?
The factor shown is precise to at least 7 significant figures. For most process-engineering work this is far better than instrument accuracy. For metrology or trade applications, refer to the relevant national standard (NIST, BIPM, ISO 80000).