Radioactivity
GBqtonCi
Convert gigabecquerels (GBq) to nanocuries (nCi).
Factor1 GBq = 2.702703e+7 nCi
Converter
GBq
Accepts numbers or expressions, e.g. 150 + 14.7
Result
nCi
Rendered to 6 significant figures.
Formula
Formula
nCi = GBq × 2.702703e+7
Multiply any value in gigabecquerels by 2.702703e+7 to obtain the value in nanocuries.
Worked example
Convert 1 GBq to nCi.
- 01Start with 1 GBq.
- 02Multiply by the conversion factor: 1 × 2.702703e+7 = 2.7027e+7 nCi.
Result1 GBq = 2.7027e+7 nCi
Conversion table
| GBq | nCi |
|---|---|
| 1 | 2.7027e+7 |
| 2 | 5.4054e+7 |
| 5 | 1.3514e+8 |
| 10 | 2.7027e+8 |
| 20 | 5.4054e+8 |
| 50 | 1.3514e+9 |
| 100 | 2.7027e+9 |
| 200 | 5.4054e+9 |
| 500 | 1.3514e+10 |
| 1000 | 2.7027e+10 |
Reference values rounded to 5 significant figures for display.
FAQ
What is the conversion factor from GBq to nCi?
1 GBq equals 2.702703e+7 nCi. To convert, multiply the value in gigabecquerels by 2.702703e+7.
How do I convert 1 GBq to nCi?
1 GBq = 2.7027e+7 nCi. For any value, multiply by 2.702703e+7.
How do I convert nCi back to GBq?
Divide by the same factor — or equivalently, multiply by 3.7e-8. So 1 nCi = 3.7e-8 GBq.
When would I need to convert gigabecquerel to nanocurie?
Radioactivity (activity) conversions between GBq and nCi 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).