Convert between gigabits (Gb) and megabytes (MB) for data transfer and storage calculations. Supports both binary (1024-based) and decimal (1000-based) systems.
Conversion system:
Binary is standard for computing; decimal is often used in marketing
Binary Conversion Factor:
1 Gigabit (Gb) = 128 Megabytes (MB) | 1 Megabyte (MB) = 0.0078125 Gigabits (Gb)
MB = Gb × 128 | Gb = MB ÷ 128 (since 1 byte = 8 bits and 1 GB = 1024 MB)
Accepts decimal values (e.g., 2 Gb = 256 MB in binary system)
Display format:
Quick conversions (binary system) - click to auto-fill:
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Units for measuring digital data - one for transfer speed, one for storage capacity
Key differences in data measurement systems:
| Conversion | Binary (1024-based) | Decimal (1000-based) | Typical Use Case |
|---|---|---|---|
| 1 Gigabit to Megabytes | 128 MB | 125 MB | File transfer calculations |
| 1 Megabyte to Gigabits | 0.0078125 Gb | 0.008 Gb | Bandwidth requirements |
| 8 Gigabits to Megabytes | 1024 MB (1 GB) | 1000 MB | Storage vs transfer equivalence |
| 100 Gigabits to Megabytes | 12,800 MB | 12,500 MB | Network capacity planning |
Common data conversions for networking, storage, and file transfers
| Gigabits (Gb) | = | Binary Megabytes (MB) | Decimal Megabytes (MB) | Practical Context |
|---|---|---|---|---|
| 0.1 Gb | = | 12.8 MB | 12.5 MB | Small photo transfer |
| 0.5 Gb | = | 64 MB | 62.5 MB | Document collection |
| 1 Gb | = | 128 MB | 125 MB | Basic conversion reference |
| 5 Gb | = | 640 MB | 625 MB | High-quality video clip |
| 8 Gb | = | 1024 MB (1 GB) | 1000 MB | 1 GB file download |
| 10 Gb | = | 1280 MB | 1250 MB | HD movie segment |
| 100 Gb | = | 12,800 MB | 12,500 MB | Large data backup |
Binary system (1024-based) is used in computing; decimal (1000-based) is often used in marketing and consumer electronics
Common questions about gigabit and megabyte conversions
To convert gigabits to megabytes, you need to account for two factors:
Binary system (computing standard): MB = Gb × (1024 / 8) = Gb × 128
Decimal system (marketing): MB = Gb × (1000 / 8) = Gb × 125
Example: Converting 2 gigabits to megabytes
Binary: 2 Gb × 128 = 256 MB
Decimal: 2 Gb × 125 = 250 MB
The key difference is the unit base (bit vs byte) and their typical uses:
| Aspect | Gigabit (Gb) | Gigabyte (GB) |
|---|---|---|
| Base Unit | Bit (smallest unit of data) | Byte (8 bits = 1 byte) |
| Symbol | Gb | GB |
| Typical Use | Network speeds, data transfer rates | Storage capacity, file sizes |
| Conversion | 1 GB = 8 Gb (exact, since 1 byte = 8 bits) | |
| Example | "1 Gbps internet" (speed) | "1 GB file" (size) |
The two systems exist for historical and practical reasons:
This discrepancy causes confusion, but our converter supports both systems to match your needs.
Conversions between gigabits and megabytes are common in these scenarios:
The 8x factor comes from the definition of a byte in computing:
1 byte = 8 bits
This standard dates back to the early days of computing when 8 bits became the standard for representing a single character (letter, number, or symbol) in binary code. While other byte sizes have existed historically, 8-bit bytes (octets) are now universal.
This is why converting between bits (used for transfer rates) and bytes (used for storage) always involves multiplying or dividing by 8, regardless of whether you're using binary or decimal systems.
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