Radioactivity
nCitoGBq
Convert nanocuries (nCi) to gigabecquerels (GBq).
Factor1 nCi = 3.7e-8 GBq
Converter
nCi
Accepts numbers or expressions, e.g. 150 + 14.7
Result
GBq
Rendered to 6 significant figures.
Formula
Formula
GBq = nCi × 3.7e-8
Multiply any value in nanocuries by 3.7e-8 to obtain the value in gigabecquerels.
Worked example
Convert 1e+8 nCi to GBq.
- 01Start with 1e+8 nCi.
- 02Multiply by the conversion factor: 1e+8 × 3.7e-8 = 3.7 GBq.
Result1e+8 nCi = 3.7 GBq
Conversion table
| nCi | GBq |
|---|---|
| 1 | 3.7e-8 |
| 2 | 7.4e-8 |
| 5 | 1.85e-7 |
| 10 | 3.7e-7 |
| 20 | 7.4e-7 |
| 50 | 1.85e-6 |
| 100 | 3.7e-6 |
| 200 | 7.4e-6 |
| 500 | 1.85e-5 |
| 1000 | 3.7e-5 |
Reference values rounded to 5 significant figures for display.
FAQ
What is the conversion factor from nCi to GBq?
1 nCi equals 3.7e-8 GBq. To convert, multiply the value in nanocuries by 3.7e-8.
How do I convert 1 nCi to GBq?
1 nCi = 3.7e-8 GBq. For any value, multiply by 3.7e-8.
How do I convert GBq back to nCi?
Divide by the same factor — or equivalently, multiply by 2.702703e+7. So 1 GBq = 2.7027e+7 nCi.
When would I need to convert nanocurie to gigabecquerel?
Radioactivity (activity) conversions between nCi and GBq 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).