Radioactivity
GBqtoTBq
Convert gigabecquerels (GBq) to terabecquerels (TBq).
Factor1 GBq = 0.001 TBq
Converter
GBq
Accepts numbers or expressions, e.g. 150 + 14.7
Result
TBq
Rendered to 6 significant figures.
Formula
Formula
TBq = GBq × 0.001
Multiply any value in gigabecquerels by 0.001 to obtain the value in terabecquerels.
Worked example
Convert 1000 GBq to TBq.
- 01Start with 1000 GBq.
- 02Multiply by the conversion factor: 1000 × 0.001 = 1 TBq.
Result1000 GBq = 1 TBq
Conversion table
| GBq | TBq |
|---|---|
| 1 | 0.001 |
| 2 | 0.002 |
| 5 | 0.005 |
| 10 | 0.01 |
| 20 | 0.02 |
| 50 | 0.05 |
| 100 | 0.1 |
| 200 | 0.2 |
| 500 | 0.5 |
| 1000 | 1 |
Reference values rounded to 5 significant figures for display.
FAQ
What is the conversion factor from GBq to TBq?
1 GBq equals 0.001 TBq. To convert, multiply the value in gigabecquerels by 0.001.
How do I convert 1 GBq to TBq?
1 GBq = 0.001 TBq. For any value, multiply by 0.001.
How do I convert TBq back to GBq?
Divide by the same factor — or equivalently, multiply by 1000. So 1 TBq = 1000 GBq.
When would I need to convert gigabecquerel to terabecquerel?
Radioactivity (activity) conversions between GBq and TBq 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).