Radioactivity
CitoPBq
Convert curies (Ci) to petabecquerels (PBq).
Factor1 Ci = 3.7e-5 PBq
Converter
Ci
Accepts numbers or expressions, e.g. 150 + 14.7
Result
PBq
Rendered to 6 significant figures.
Formula
Formula
PBq = Ci × 3.7e-5
Multiply any value in curies by 3.7e-5 to obtain the value in petabecquerels.
Worked example
Convert 30000 Ci to PBq.
- 01Start with 30000 Ci.
- 02Multiply by the conversion factor: 30000 × 3.7e-5 = 1.11 PBq.
Result30000 Ci = 1.11 PBq
Conversion table
| Ci | PBq |
|---|---|
| 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 Ci to PBq?
1 Ci equals 3.7e-5 PBq. To convert, multiply the value in curies by 3.7e-5.
How do I convert 1 Ci to PBq?
1 Ci = 3.7e-5 PBq. For any value, multiply by 3.7e-5.
How do I convert PBq back to Ci?
Divide by the same factor — or equivalently, multiply by 27027.03. So 1 PBq = 27027 Ci.
When would I need to convert curie to petabecquerel?
Radioactivity (activity) conversions between Ci and PBq 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).