Convert Gigabecquerels to Terabecquerels (GBq to TBq)
1 gigabecquerel (GBq) = 0.001 terabecquerels (TBq). 1 TBq = 1000 GBq. Example: 15 GBq = 15 × 0.001 = 0.015 TBq.
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1 GBq = 0.001 TBq
Type in either box. Scientific notation works: 1.5e-3.
Converting a list? Use the bulk gigabecquerel to terabecquerel converter to paste a column from Excel.
How to Convert Gigabecquerel to Terabecquerel
- 1 GBq = 0.001 TBq
- 1 TBq = 1000 GBq
- Example: convert 15 GBq to TBq: 15 GBq = 15 × 0.001 TBq = 0.015 TBq
Formula
TBq = GBq ÷ 1000
Derivation from SI units:
- 1 GBq = 10⁹ Bq.
- 1 TBq = 10¹² Bq.
- 1 GBq = 1000000000 Bq ÷ 1000000000000 Bq per TBq = 0.001 TBq
Both units are defined exactly, so the factor is exact. Gigabecquerel definition: gigabecquerel; Terabecquerel definition: terabecquerel.
Worked examples
- A reading of 2 GBq converts to 0.002 TBq.
2 GBq × 0.001 = 0.002 TBq - A value of 20 GBq is 0.02 TBq.
20 GBq × 0.001 = 0.02 TBq
Gigabecquerel to Terabecquerel conversion table
| Gigabecquerels (GBq) | Terabecquerels (TBq) |
|---|---|
| 0.1 GBq | 0.0001 TBq |
| 0.5 GBq | 0.0005 TBq |
| 1 GBq | 0.001 TBq |
| 2 GBq | 0.002 TBq |
| 5 GBq | 0.005 TBq |
| 10 GBq | 0.01 TBq |
| 20 GBq | 0.02 TBq |
| 50 GBq | 0.05 TBq |
| 100 GBq | 0.1 TBq |
| 1000 GBq | 1 TBq |
Where it's used
Gigabecquerels are used for radioiodine therapy (1–7 GBq), while terabecquerels appear in cobalt-60 and iridium-192 sources. Both measure activity of a radioactive source, so the conversion is a fixed factor.
Gigabecquerel to other radioactivity units
| Conversion | 1 GBq equals |
|---|---|
| gigabecquerel to terabecquerel | 0.001 TBq |
| gigabecquerel to becquerel | 1000000000 Bq |
| gigabecquerel to curie | 0.02702702703 Ci |
| gigabecquerel to megabecquerel | 1000 MBq |
| gigabecquerel to millicurie | 27.02702703 mCi |
| gigabecquerel to picocurie | 27027027030 pCi |
| gigabecquerel to kilobecquerel | 1000000 kBq |
| gigabecquerel to microcurie | 27027.02703 µCi |
Show 3 more units
| gigabecquerel to disintegration per minute | 60000000000 dpm |
|---|---|
| gigabecquerel to nanocurie | 27027027.03 nCi |
| gigabecquerel to rutherford | 1000 Rd |
Frequently asked questions
How many terabecquerels are in 1 gigabecquerel?
1 GBq = 0.001 TBq.
How do I convert gigabecquerels to terabecquerels?
Multiply the value in GBq by 0.001, or divide it by 1000. For example, 15 GBq × 0.001 = 0.015 TBq.
Is the GBq to TBq conversion exact?
Yes. Both units are defined exactly, and 1 GBq is exactly 0.001 TBq.
Sources
- The International System of Units (SI), 9th edition (SI Brochure), Bureau International des Poids et Mesures , Table 4 (becquerel, gray, sievert, lux) and Table 2 (candela).
Last reviewed: . Factors are stored exactly and computed with 50-digit decimal arithmetic. See how we verify conversion factors.
Cite this page
APA
Scientific Converters. (2026, October 15). Convert Gigabecquerels to Terabecquerels (GBq to TBq). Retrieved October 25, 2026, from https://scientificconverters.com/radioactivity/gigabecquerels-to-terabecquerels/
IEEE
Scientific Converters, "Convert Gigabecquerels to Terabecquerels (GBq to TBq)," scientificconverters.com. Accessed: Oct. 25, 2026. [Online]. Available: https://scientificconverters.com/radioactivity/gigabecquerels-to-terabecquerels/