This online calculator converts digital capacity between gigabytes (GB) and megabytes (MB) using both decimal (SI) and binary conventions. Supported symbols: GB, MB (decimal), GiB, MiB (binary). Pick the base that matches your context.
Gigabytes (GB) to Megabytes (MB) Converter
Enter a value in gigabytes and convert it to megabytes.
Gigabytes (GB)
Result in Megabytes (MB)
How to use
- Enter a value in “Gigabytes (GB)”.
- Choose base: 1000 for decimal GB/MB or 1024 for binary GiB/MiB.
- Select “Convert” to get megabytes and see the calculation line.
- Use “Copy Result” to copy the output.
- Use “Clear All” to reset fields. The “Swap” link leads to the reverse tool when provided.
Definitions and unit facts
Gigabyte (GB) / Gibibyte (GiB) — Decimal gigabyte defines 1 GB = 10^9 bytes and 1 GB = 1000 MB. Binary gibibyte defines 1 GiB = 2^30 bytes and 1 GiB = 1024 MiB. Systems: GB, MB are SI-decimal for storage marketing and data transfer; GiB, MiB are binary for memory and many OS reports. Abbreviations: GB, MB (decimal); GiB, MiB (binary). Cross-mapping: 1 GB ≈ 0.931323 GiB.
Megabyte (MB) / Mebibyte (MiB) — Decimal megabyte defines 1 MB = 10^6 bytes. Binary mebibyte defines 1 MiB = 2^20 bytes. Exact relations used here: 1 GB = 1000 MB (decimal option) and 1 GiB = 1024 MiB (binary option). Cross-mapping: 1 MB ≈ 0.953674 MiB.
Conversion formula
Decimal: MB = GB × 1000. Binary: MiB = GiB × 1024. Sources: NIST — SI prefixes (kilo = 10^3, mega = 10^6, giga = 10^9), NIST — Prefixes for binary multiples (Ki, Mi, Gi).
Conversion table
| GB | MB, 1000 | MiB, 1024 |
|---|---|---|
| 0.001 | 1 | 1.024 |
| 0.010 | 10 | 10.24 |
| 0.100 | 100 | 102.4 |
| 0.250 | 250 | 256 |
| 0.500 | 500 | 512 |
| 0.750 | 750 | 768 |
| 1.000 | 1,000 | 1,024 |
| 2.000 | 2,000 | 2,048 |
| 2.500 | 2,500 | 2,560 |
| 5.000 | 5,000 | 5,120 |
| 10.000 | 10,000 | 10,240 |
| 25.000 | 25,000 | 25,600 |
| 32.000 | 32,000 | 32,768 |
| 50.000 | 50,000 | 51,200 |
| 64.000 | 64,000 | 65,536 |
| 100.000 | 100,000 | 102,400 |
| 128.000 | 128,000 | 131,072 |
| 256.000 | 256,000 | 262,144 |
| 512.000 | 512,000 | 524,288 |
| 1,000.000 | 1,000,000 | 1,024,000 |
Real-world examples
- 700 MB CD-ROM (decimal) = 0.700 GB.
- 4.7 GB DVD-5 (decimal label) = 4,700 MB.
- 25 GB Blu-ray SL (decimal label) = 25,000 MB.
- 32 GB microSD card (decimal label) = 32,000 MB.
- 64 GB USB drive (decimal label) = 64,000 MB.
- 128 GB SSD partition (decimal) = 128,000 MB.
- 256 GB external SSD (decimal) = 256,000 MB.
- 512 GB NVMe volume (decimal) = 512,000 MB.
- 1 GB file (decimal) = 1,000 MB; binary size ≈ 0.931 GiB.
- 8 GiB memory dump (binary) = 8 × 1024 MiB = 8,192 MiB.
What capacities are you converting with this tool? If a related calculator would help your work, describe it in the comments and we will consider building it.
CalcuLife.com
Leave A Comment