Radioactivity
µCitoGBq
Convert microcuries (µCi) to gigabecquerels (GBq).
Factor1 µCi = 3.7e-5 GBq
Converter
µCi
Accepts numbers or expressions, e.g. 150 + 14.7
Result
GBq
Rendered to 6 significant figures.
Formula
Formula
GBq = µCi × 3.7e-5
Multiply any value in microcuries by 3.7e-5 to obtain the value in gigabecquerels.
Worked example
Convert 100000 µCi to GBq.
- 01Start with 100000 µCi.
- 02Multiply by the conversion factor: 100000 × 3.7e-5 = 3.7 GBq.
Result100000 µCi = 3.7 GBq
Conversion table
| µCi | GBq |
|---|---|
| 1 | 3.7e-5 |
| 2 | 7.4e-5 |
| 5 | 0.000185 |
| 10 | 0.00037 |
| 20 | 0.00074 |
| 50 | 0.00185 |
| 100 | 0.0037 |
| 200 | 0.0074 |
| 500 | 0.0185 |
| 1000 | 0.037 |
Reference values rounded to 5 significant figures for display.
FAQ
What is the conversion factor from µCi to GBq?
1 µCi equals 3.7e-5 GBq. To convert, multiply the value in microcuries by 3.7e-5.
How do I convert 1 µCi to GBq?
1 µCi = 3.7e-5 GBq. For any value, multiply by 3.7e-5.
How do I convert GBq back to µCi?
Divide by the same factor — or equivalently, multiply by 27027.03. So 1 GBq = 27027 µCi.
When would I need to convert microcurie to gigabecquerel?
Radioactivity (activity) conversions between µCi 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).