Radioactivity
PBqtoCi
Convert petabecquerels (PBq) to curies (Ci).
Factor1 PBq = 27027.03 Ci
Converter
PBq
Accepts numbers or expressions, e.g. 150 + 14.7
Result
Ci
Rendered to 6 significant figures.
Formula
Formula
Ci = PBq × 27027.03
Multiply any value in petabecquerels by 27027.03 to obtain the value in curies.
Worked example
Convert 1 PBq to Ci.
- 01Start with 1 PBq.
- 02Multiply by the conversion factor: 1 × 27027.03 = 27027 Ci.
Result1 PBq = 27027 Ci
Conversion table
| PBq | Ci |
|---|---|
| 1 | 27027 |
| 2 | 54054 |
| 5 | 1.3514e+5 |
| 10 | 2.7027e+5 |
| 20 | 5.4054e+5 |
| 50 | 1.3514e+6 |
| 100 | 2.7027e+6 |
| 200 | 5.4054e+6 |
| 500 | 1.3514e+7 |
| 1000 | 2.7027e+7 |
Reference values rounded to 5 significant figures for display.
FAQ
What is the conversion factor from PBq to Ci?
1 PBq equals 27027.03 Ci. To convert, multiply the value in petabecquerels by 27027.03.
How do I convert 1 PBq to Ci?
1 PBq = 27027 Ci. For any value, multiply by 27027.03.
How do I convert Ci back to PBq?
Divide by the same factor — or equivalently, multiply by 3.7e-5. So 1 Ci = 3.7e-5 PBq.
When would I need to convert petabecquerel to curie?
Radioactivity (activity) conversions between PBq and Ci 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).