Radioactivity
TBqtoCi
Convert terabecquerels (TBq) to curies (Ci).
Factor1 TBq = 27.02703 Ci
Converter
TBq
Accepts numbers or expressions, e.g. 150 + 14.7
Result
Ci
Rendered to 6 significant figures.
Formula
Formula
Ci = TBq × 27.02703
Multiply any value in terabecquerels by 27.02703 to obtain the value in curies.
Worked example
Convert 1 TBq to Ci.
- 01Start with 1 TBq.
- 02Multiply by the conversion factor: 1 × 27.02703 = 27.027 Ci.
Result1 TBq = 27.027 Ci
Conversion table
| TBq | Ci |
|---|---|
| 1 | 27.027 |
| 2 | 54.054 |
| 5 | 135.14 |
| 10 | 270.27 |
| 20 | 540.54 |
| 50 | 1351.4 |
| 100 | 2702.7 |
| 200 | 5405.4 |
| 500 | 13514 |
| 1000 | 27027 |
Reference values rounded to 5 significant figures for display.
FAQ
What is the conversion factor from TBq to Ci?
1 TBq equals 27.02703 Ci. To convert, multiply the value in terabecquerels by 27.02703.
How do I convert 1 TBq to Ci?
1 TBq = 27.027 Ci. For any value, multiply by 27.02703.
How do I convert Ci back to TBq?
Divide by the same factor — or equivalently, multiply by 0.037. So 1 Ci = 0.037 TBq.
When would I need to convert terabecquerel to curie?
Radioactivity (activity) conversions between TBq 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).