Digital Data Storage
GBtoMB
Convert gigabytes (GB) to megabytes (MB).
Factor1 GB = 1000 MB
Converter
GB
Accepts numbers or expressions, e.g. 150 + 14.7
Result
MB
Rendered to 6 significant figures.
Formula
Formula
MB = GB × 1000
Multiply any value in gigabytes by 1000 to obtain the value in megabytes.
Worked example
Convert 1 GB to MB.
- 01Start with 1 GB.
- 02Multiply by the conversion factor: 1 × 1000 = 1000 MB.
Result1 GB = 1000 MB
Conversion table
| GB | MB |
|---|---|
| 1 | 1000 |
| 2 | 2000 |
| 5 | 5000 |
| 10 | 10000 |
| 20 | 20000 |
| 50 | 50000 |
| 100 | 1.0000e+5 |
| 200 | 2.0000e+5 |
| 500 | 5.0000e+5 |
| 1000 | 1.0000e+6 |
Reference values rounded to 5 significant figures for display.
FAQ
What is the conversion factor from GB to MB?
1 GB equals 1000 MB. To convert, multiply the value in gigabytes by 1000.
How do I convert 1 GB to MB?
1 GB = 1000 MB. For any value, multiply by 1000.
How do I convert MB back to GB?
Divide by the same factor — or equivalently, multiply by 0.001. So 1 MB = 0.001 GB.
When would I need to convert gigabyte to megabyte?
Digital data-storage conversions between GB and MB are routine in IT, networking, storage-array engineering, datacenter capacity planning, cloud-cost reconciliation, embedded systems and scientific data acquisition. Decimal (SI) units (kB, MB, GB, TB, PB) use base-10 multiples: 1 kB = 1,000 bytes. Binary (IEC 80000-13) units (KiB, MiB, GiB, TiB, PiB) use base-2 multiples: 1 KiB = 1,024 bytes. 1 byte = 8 bits exactly across both ladders. This category is storage size only — it does NOT cover data-transfer rate (bit/s, MB/s), download-time, bandwidth, compression-ratio assumptions or storage-pricing calculators, all of which require additional information beyond a single linear factor.
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).