Convert Gigabecquerels to Megabecquerels (GBq to MBq)
1 gigabecquerel (GBq) = 1000 megabecquerels (MBq). 1 MBq = 0.001 GBq. Example: 15 GBq = 15 × 1000 = 15000 MBq.
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1 GBq = 1000 MBq
Type in either box. Scientific notation works: 1.5e-3.
Converting a list? Use the bulk gigabecquerel to megabecquerel converter to paste a column from Excel.
How to Convert Gigabecquerel to Megabecquerel
- 1 GBq = 1000 MBq
- 1 MBq = 0.001 GBq
- Example: convert 15 GBq to MBq: 15 GBq = 15 × 1000 MBq = 15000 MBq
Formula
MBq = GBq × 1000
Derivation from SI units:
- 1 GBq = 10⁹ Bq.
- 1 MBq = 10⁶ Bq.
- 1 GBq = 1000000000 Bq ÷ 1000000 Bq per MBq = 1000 MBq
Both units are defined exactly, so the factor is exact. Gigabecquerel definition: gigabecquerel; Megabecquerel definition: megabecquerel.
Worked examples
- A reading of 2 GBq converts to 2000 MBq.
2 GBq × 1000 = 2000 MBq - A value of 20 GBq is 20000 MBq.
20 GBq × 1000 = 20000 MBq
Gigabecquerel to Megabecquerel conversion table
| Gigabecquerels (GBq) | Megabecquerels (MBq) |
|---|---|
| 0.1 GBq | 100 MBq |
| 0.5 GBq | 500 MBq |
| 1 GBq | 1000 MBq |
| 2 GBq | 2000 MBq |
| 5 GBq | 5000 MBq |
| 10 GBq | 10000 MBq |
| 20 GBq | 20000 MBq |
| 50 GBq | 50000 MBq |
| 100 GBq | 100000 MBq |
| 1000 GBq | 1000000 MBq |
Where it's used
Gigabecquerels are used for radioiodine therapy (1–7 GBq), while megabecquerels appear in PET and SPECT doses (e.g. 370 MBq of F-18 FDG). 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 megabecquerel | 1000 MBq |
| gigabecquerel to becquerel | 1000000000 Bq |
| gigabecquerel to curie | 0.02702702703 Ci |
| 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 megabecquerels are in 1 gigabecquerel?
1 GBq = 1000 MBq.
How do I convert gigabecquerels to megabecquerels?
Multiply the value in GBq by 1000. For example, 15 GBq × 1000 = 15000 MBq.
Is the GBq to MBq conversion exact?
Yes. Both units are defined exactly, and 1 GBq is exactly 1000 MBq.
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 Megabecquerels (GBq to MBq). Retrieved October 25, 2026, from https://scientificconverters.com/radioactivity/gigabecquerels-to-megabecquerels/
IEEE
Scientific Converters, "Convert Gigabecquerels to Megabecquerels (GBq to MBq)," scientificconverters.com. Accessed: Oct. 25, 2026. [Online]. Available: https://scientificconverters.com/radioactivity/gigabecquerels-to-megabecquerels/