Radioactivity
GBqtokCi
Convert gigabecquerels (GBq) to kilocuries (kCi).
Factor1 GBq = 2.702703e-5 kCi
Converter
GBq
Accepts numbers or expressions, e.g. 150 + 14.7
Result
kCi
Rendered to 6 significant figures.
Formula
Formula
kCi = GBq × 2.702703e-5
Multiply any value in gigabecquerels by 2.702703e-5 to obtain the value in kilocuries.
Worked example
Convert 100000 GBq to kCi.
- 01Start with 100000 GBq.
- 02Multiply by the conversion factor: 100000 × 2.702703e-5 = 2.7027 kCi.
Result100000 GBq = 2.7027 kCi
Conversion table
| GBq | kCi |
|---|---|
| 1 | 2.7027e-5 |
| 2 | 5.4054e-5 |
| 5 | 0.00013514 |
| 10 | 0.00027027 |
| 20 | 0.00054054 |
| 50 | 0.0013514 |
| 100 | 0.0027027 |
| 200 | 0.0054054 |
| 500 | 0.013514 |
| 1000 | 0.027027 |
Reference values rounded to 5 significant figures for display.
FAQ
What is the conversion factor from GBq to kCi?
1 GBq equals 2.702703e-5 kCi. To convert, multiply the value in gigabecquerels by 2.702703e-5.
How do I convert 1 GBq to kCi?
1 GBq = 2.7027e-5 kCi. For any value, multiply by 2.702703e-5.
How do I convert kCi back to GBq?
Divide by the same factor — or equivalently, multiply by 37000. So 1 kCi = 37000 GBq.
When would I need to convert gigabecquerel to kilocurie?
Radioactivity (activity) conversions between GBq and kCi 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).