Gigabytes to megabytes
1 gigabyte = 1024 megabytes
For any other value: MB = GB × 1024
Calculator
1024 MB
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You can leave the unit in: 100 GB is fine.
Gigabytes to megabytes chart
The values people look up most.
| gigabytes | 1 GB = 1024 MB | Decimal (1000) |
|---|---|---|
| 1 GB | 1024 MB | 1000 MB |
| 16 GB | 16384 MB | 16000 MB |
| 8 GB | 8192 MB | 8000 MB |
| 1000 GB | 1024000 MB | 1000000 MB |
| 32 GB | 32768 MB | 32000 MB |
| 4 GB | 4096 MB | 4000 MB |
| 6 GB | 6144 MB | 6000 MB |
| 12 GB | 12288 MB | 12000 MB |
| 5 GB | 5120 MB | 5000 MB |
| 10 GB | 10240 MB | 10000 MB |
| 100 GB | 102400 MB | 100000 MB |
| 64 GB | 65536 MB | 64000 MB |
| 50 GB | 51200 MB | 50000 MB |
| 2 GB | 2048 MB | 2000 MB |
| 128 GB | 131072 MB | 128000 MB |
| 250 GB | 256000 MB | 250000 MB |
| 20 GB | 20480 MB | 20000 MB |
| 200 GB | 204800 MB | 200000 MB |
| 500 GB | 512000 MB | 500000 MB |
| 30 GB | 30720 MB | 30000 MB |
| 40 GB | 40960 MB | 40000 MB |
| 15 GB | 15360 MB | 15000 MB |
| 24 GB | 24576 MB | 24000 MB |
| 256 GB | 262144 MB | 256000 MB |
| 7 GB | 7168 MB | 7000 MB |
| 1.5 GB | 1536 MB | 1500 MB |
| 300 GB | 307200 MB | 300000 MB |
| 60 GB | 61440 MB | 60000 MB |
| 3 GB | 3072 MB | 3000 MB |
| 2.5 GB | 2560 MB | 2500 MB |
Formula
MB = GB × 1024
1024 or 1000?
Both answers are right. This page uses 1 GB = 1024 MB, which is what Windows shows. Drive makers, and macOS since version 10.6, use 1 GB = 1000 MB, which is why a “500 GB” drive looks smaller in Windows than on the box. The chart shows both.
Where this number comes from
NIST defines the binary prefixes — kibi, mebi, gibi — precisely to settle this ambiguity.
Source: Prefixes for binary multiples, NIST.
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