Convert Gigabecquerels to Becquerels (GBq to Bq)
1 gigabecquerel (GBq) = 1000000000 becquerels (Bq). 1 Bq = 1 × 10⁻⁹ GBq. Example: 15 GBq = 15 × 1000000000 = 15000000000 Bq.
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1 GBq = 1000000000 Bq
Type in either box. Scientific notation works: 1.5e-3.
Converting a list? Use the bulk gigabecquerel to becquerel converter to paste a column from Excel.
How to Convert Gigabecquerel to Becquerel
- 1 GBq = 1000000000 Bq
- 1 Bq = 1 × 10⁻⁹ GBq
- Example: convert 15 GBq to Bq: 15 GBq = 15 × 1000000000 Bq = 15000000000 Bq
Formula
Bq = GBq × 1000000000
Derivation from SI units:
- 1 GBq = 10⁹ Bq.
- 1 Bq = 1 decay per second (s⁻¹).
Both units are defined exactly, so the factor is exact. Gigabecquerel definition: gigabecquerel; Becquerel definition: becquerel.
Worked examples
- A reading of 2 GBq converts to 2000000000 Bq.
2 GBq × 1000000000 = 2000000000 Bq - A value of 20 GBq is 20000000000 Bq.
20 GBq × 1000000000 = 20000000000 Bq
Gigabecquerel to Becquerel conversion table
| Gigabecquerels (GBq) | Becquerels (Bq) |
|---|---|
| 0.1 GBq | 100000000 Bq |
| 0.5 GBq | 500000000 Bq |
| 1 GBq | 1000000000 Bq |
| 2 GBq | 2000000000 Bq |
| 5 GBq | 5000000000 Bq |
| 10 GBq | 10000000000 Bq |
| 20 GBq | 20000000000 Bq |
| 50 GBq | 50000000000 Bq |
| 100 GBq | 100000000000 Bq |
| 1000 GBq | 1000000000000 Bq |
Where it's used
Gigabecquerels are used for radioiodine therapy (1–7 GBq), while becquerels appear in food and environmental radioactivity limits. 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 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 |
| gigabecquerel to disintegration per minute | 60000000000 dpm |
Show 3 more units
| gigabecquerel to terabecquerel | 0.001 TBq |
|---|---|
| gigabecquerel to nanocurie | 27027027.03 nCi |
| gigabecquerel to rutherford | 1000 Rd |
Frequently asked questions
How many becquerels are in 1 gigabecquerel?
1 GBq = 1000000000 Bq.
How do I convert gigabecquerels to becquerels?
Multiply the value in GBq by 1000000000. For example, 15 GBq × 1000000000 = 15000000000 Bq.
Is the GBq to Bq conversion exact?
Yes. Both units are defined exactly, and 1 GBq is exactly 1000000000 Bq.
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 Becquerels (GBq to Bq). Retrieved October 25, 2026, from https://scientificconverters.com/radioactivity/gigabecquerels-to-becquerels/
IEEE
Scientific Converters, "Convert Gigabecquerels to Becquerels (GBq to Bq)," scientificconverters.com. Accessed: Oct. 25, 2026. [Online]. Available: https://scientificconverters.com/radioactivity/gigabecquerels-to-becquerels/