Radioactivity
BqtoµCi
Convert becquerels (Bq) to microcuries (µCi).
Factor1 Bq = 2.702703e-5 µCi
Converter
Bq
Accepts numbers or expressions, e.g. 150 + 14.7
Result
µCi
Rendered to 6 significant figures.
Formula
Formula
µCi = Bq × 2.702703e-5
Multiply any value in becquerels by 2.702703e-5 to obtain the value in microcuries.
Worked example
Convert 1000 Bq to µCi.
- 01Start with 1000 Bq.
- 02Multiply by the conversion factor: 1000 × 2.702703e-5 = 0.027027 µCi.
Result1000 Bq = 0.027027 µCi
Conversion table
| Bq | µCi |
|---|---|
| 1 | 2.7027e-5 |
| 2 | 5.4054e-5 |
| 5 | 0.00013514 |
| 10 | 0.00027027 |
| 20 | 0.00054054 |
| 50 | 0.0013514 |
| 100 | 0.0027027 |
| 200 | 0.0054054 |
| 500 | 0.013514 |
| 1000 | 0.027027 |
Reference values rounded to 5 significant figures for display.
FAQ
What is the conversion factor from Bq to µCi?
1 Bq equals 2.702703e-5 µCi. To convert, multiply the value in becquerels by 2.702703e-5.
How do I convert 1 Bq to µCi?
1 Bq = 2.7027e-5 µCi. For any value, multiply by 2.702703e-5.
How do I convert µCi back to Bq?
Divide by the same factor — or equivalently, multiply by 37000. So 1 µCi = 37000 Bq.
When would I need to convert becquerel to microcurie?
Radioactivity (activity) conversions between Bq and µCi 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).