Radioactivity
mCitoGBq
Convert millicuries (mCi) to gigabecquerels (GBq).
Factor1 mCi = 0.037 GBq
Converter
mCi
Accepts numbers or expressions, e.g. 150 + 14.7
Result
GBq
Rendered to 6 significant figures.
Formula
Formula
GBq = mCi × 0.037
Multiply any value in millicuries by 0.037 to obtain the value in gigabecquerels.
Worked example
Convert 100 mCi to GBq.
- 01Start with 100 mCi.
- 02Multiply by the conversion factor: 100 × 0.037 = 3.7 GBq.
Result100 mCi = 3.7 GBq
Conversion table
| mCi | GBq |
|---|---|
| 1 | 0.037 |
| 2 | 0.074 |
| 5 | 0.185 |
| 10 | 0.37 |
| 20 | 0.74 |
| 50 | 1.85 |
| 100 | 3.7 |
| 200 | 7.4 |
| 500 | 18.5 |
| 1000 | 37 |
Reference values rounded to 5 significant figures for display.
FAQ
What is the conversion factor from mCi to GBq?
1 mCi equals 0.037 GBq. To convert, multiply the value in millicuries by 0.037.
How do I convert 1 mCi to GBq?
1 mCi = 0.037 GBq. For any value, multiply by 0.037.
How do I convert GBq back to mCi?
Divide by the same factor — or equivalently, multiply by 27.02703. So 1 GBq = 27.027 mCi.
When would I need to convert millicurie to gigabecquerel?
Radioactivity (activity) conversions between mCi 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).