1 GB
1,024 MB
Data Storage Converter
GB to MB Converter
Convert gigabytes to megabytes instantly, in both directions — using the standard binary (1024) factor that matches your operating system.
- Live Bidirectional
- Binary 1024 Standard
- 100% Private
Convert Gigabytes ⇄ Megabytes
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Reference
Common GB to MB Conversions
2 GB
2,048 MB
4 GB
4,096 MB
8 GB
8,192 MB
16 GB
16,384 MB
32 GB
32,768 MB
64 GB
65,536 MB
128 GB
131,072 MB
FAQ
Frequently Asked Questions
1 gigabyte equals 1,024 megabytes, using the binary convention that matches how Windows, macOS, and most operating systems report file and drive sizes.
Multiply the number of gigabytes by 1,024. For example, 4 GB × 1,024 = 4,096 MB.
Divide the number of megabytes by 1,024. For example, 2,048 MB ÷ 1,024 = 2 GB.
Storage manufacturers typically advertise capacity using decimal (1000-based) units, while operating systems report it using binary (1024-based) units. A drive labeled "1 TB" (1,000,000,000,000 bytes in decimal) shows up as roughly 931 GB in an OS that uses 1024-based gibibytes — no storage is actually missing, it's a unit definition difference.
Under the binary convention used by this converter, yes — 1 GB is always exactly 1,024 MB. Some contexts (like network speed, measured in bits, or manufacturer marketing) use a decimal 1,000 factor instead, which is why you may occasionally see a slightly different number elsewhere.
The GB to MB Formula
To convert gigabytes to megabytes, multiply by 1,024: MB = GB × 1024. To go the other way, divide by 1,024: GB = MB ÷ 1024. This tool uses the binary (base-1024) convention, matching how file sizes appear in Windows Explorer, macOS Finder, and most software.
Full Reference Table
| Gigabytes | Megabytes |
|---|---|
| 0.5 GB | 512 MB |
| 1 GB | 1,024 MB |
| 2 GB | 2,048 MB |
| 4 GB | 4,096 MB |
| 8 GB | 8,192 MB |
| 16 GB | 16,384 MB |
| 32 GB | 32,768 MB |
| 64 GB | 65,536 MB |
| 100 GB | 102,400 MB |
Decimal vs. Binary: GB (1000) vs. GiB (1024)
Technically, the SI prefix "giga" means exactly 1,000,000,000 (10⁹), and the correct binary term is gibibyte (GiB) for 1,073,741,824 bytes. In practice, "GB" is used colloquially for both, and operating systems almost universally display file sizes using the 1024-based calculation — which is what this tool uses by default.