Radioactivity
mCitoBq
Convert millicuries (mCi) to becquerels (Bq).
Factor1 mCi = 3.7e+7 Bq
Converter
mCi
Accepts numbers or expressions, e.g. 150 + 14.7
Result
Bq
Rendered to 6 significant figures.
Formula
Formula
Bq = mCi × 3.7e+7
Multiply any value in millicuries by 3.7e+7 to obtain the value in becquerels.
Worked example
Convert 1 mCi to Bq.
- 01Start with 1 mCi.
- 02Multiply by the conversion factor: 1 × 3.7e+7 = 3.7e+7 Bq.
Result1 mCi = 3.7e+7 Bq
Conversion table
| mCi | Bq |
|---|---|
| 1 | 3.7e+7 |
| 2 | 7.4e+7 |
| 5 | 1.85e+8 |
| 10 | 3.7e+8 |
| 20 | 7.4e+8 |
| 50 | 1.85e+9 |
| 100 | 3.7e+9 |
| 200 | 7.4e+9 |
| 500 | 1.85e+10 |
| 1000 | 3.7e+10 |
Reference values rounded to 5 significant figures for display.
FAQ
What is the conversion factor from mCi to Bq?
1 mCi equals 3.7e+7 Bq. To convert, multiply the value in millicuries by 3.7e+7.
How do I convert 1 mCi to Bq?
1 mCi = 3.7e+7 Bq. For any value, multiply by 3.7e+7.
How do I convert Bq back to mCi?
Divide by the same factor — or equivalently, multiply by 2.702703e-8. So 1 Bq = 2.7027e-8 mCi.
When would I need to convert millicurie to becquerel?
Radioactivity (activity) conversions between mCi and Bq 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).