Megabit digital storage unit.
Megabits to MB Converter — Mb to MB
Convert Megabit (Mb) to MB (MB) using the exact conversion factor (1 megabit = 0.125 mb). See the formula, worked examples, conversion table, unit comparison, history, and common uses.
Megabits to MB converter
Converter
Digital Storage Converter
Convert bits, bytes, decimal storage, binary storage, nibbles, and word sizes.
Context values
Some unit families need one extra value for a physically accurate result.
MB digital storage unit.
Result = input x 1e+6 / 8e+6.
Digital storage uses bits as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Megabits to MB
Megabit and MB are everyday digital-storage units, used for everything from file sizes and app downloads to storage device capacity and mobile data allowances. Megabit is typically associated with used worldwide for network and internet speed ratings, while MB is typically associated with used worldwide as a standard digital storage and file-size unit.
Formula
mb = megabits × 0.125
This factor comes from each unit's defined relationship to the category's base unit: 1 megabit equals 1000000 base units, and 1 mb equals 8000000 base units, so dividing one by the other gives the direct megabit-to-mb factor of 0.125.
Simple example
1 Mb × 0.125 = 0.125 MB
1 megabit = 0.125 mb.
Real-world example
500 Mb × 0.125 = 62.5 MB
500 megabits = 62.5 mb.
Conversion table
| Megabit (Mb) | MB (MB) |
|---|---|
| 1 Mb | 0.125 MB |
| 8 Mb | 1 MB |
| 16 Mb | 2 MB |
| 64 Mb | 8 MB |
| 256 Mb | 32 MB |
| 1,000 Mb | 125 MB |
Reverse conversion: MB to Megabit
0.125 MB × 8 = 1 Mb
0.125 mb = 1 megabit.
megabits = mb × 8
For a page dedicated to this direction, see MB to Megabit.
Megabit vs. MB
| Aspect | Megabit | MB |
|---|---|---|
| Family | Decimal (SI-prefixed) digital unit | Decimal (SI-prefixed) digital storage unit |
| Typical use | Internet connection speed advertising (Mbps) | File and document size reporting |
| Where it's used | Used worldwide for network and internet speed ratings | Used worldwide as a standard digital storage and file-size unit |
Understanding the Megabit
Megabit (Mb) measures digital storage/transfer. A megabit is 1,000,000 bits (125,000 bytes) under the decimal convention used for network speeds. It is classified as a Decimal (SI-prefixed) digital unit.
Where it's used: Used worldwide for network and internet speed ratings
Megabits vs. megabytes. Internet speeds are quoted in megabits per second (Mbps), while file sizes are quoted in megabytes (MB) — 8 megabits equal 1 megabyte, so a '100 Mbps' connection downloads at up to about 12.5 MB per second.
Uses of the Megabit today
- Internet connection speed advertising (Mbps)
- Network bandwidth measurement
History of the Megabit
Network speeds have conventionally been quoted in bits rather than bytes since early telecommunications measured signal rate in bits per second; this convention carried into modern internet service marketing, which is why connection speeds (Mbps) and file sizes (MB) use different base units, a frequent source of consumer confusion.
Historical origin. Megabit was not the invention of a single named person; it developed through the process described above.
Understanding the MB
MB (MB) measures digital storage. In the decimal convention used by storage manufacturers and most software, 1 megabyte equals 1,000 kilobytes (10⁶ bytes). It is classified as a Decimal (SI-prefixed) digital storage unit.
Where it's used: Used worldwide as a standard digital storage and file-size unit
Decimal MB vs. binary MiB. Storage manufacturers typically use decimal megabytes (10⁶ bytes), while some operating systems report binary mebibytes (2²⁰ bytes) but label them 'MB' — this is the common reason a drive's reported capacity looks smaller than advertised.
Uses of the MB today
- File and document size reporting
- Storage device capacity labeling
- Network transfer size measurement
History of the MB
Byte-based storage units grew out of early computing, where memory was naturally organized in powers of two, leading to the common but technically non-standard practice of using 'megabyte' to mean 2²⁰ bytes (1,048,576) in some software contexts.
In 1998, the International Electrotechnical Commission (IEC) introduced binary prefixes — kibi-, mebi-, gibi- — specifically so 'megabyte' could be reserved for the decimal (10⁶) meaning and 'mebibyte' (MiB) used for the binary (2²⁰) meaning, resolving the ambiguity, though usage still varies by industry.
Historical origin. MB was not the invention of a single named person; it developed through the process described above.
Megabit — sources
- IEC 80000-13 — Defines bit-based units distinct from byte-based units.
MB — sources
- IEC 80000-13 — International standard defining binary prefixes (kibi-, mebi-, gibi-) distinct from decimal SI prefixes.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many mb are in 1 megabit?
1 megabit equals 0.125 mb, using the exact defined conversion factor rather than an estimate.
How do I convert megabit to mb?
Multiply the megabit value by 0.125. The converter above does this instantly to whatever precision you set.
How do I convert mb back to megabit?
Use the reverse factor: 1 mb equals 8 megabits. You can also use the swap control in the converter above to flip the direction instantly.
What is a megabit?
Megabit (Mb) measures digital storage/transfer. A megabit is 1,000,000 bits (125,000 bytes) under the decimal convention used for network speeds. It is classified as a Decimal (SI-prefixed) digital unit.
What is a mb?
MB (MB) measures digital storage. In the decimal convention used by storage manufacturers and most software, 1 megabyte equals 1,000 kilobytes (10⁶ bytes). It is classified as a Decimal (SI-prefixed) digital storage unit.
Is the megabit to mb conversion exact?
Yes. Both megabit and mb are defined by fixed standards rather than physical artifacts, so the factor of 0.125 used above is exact to as many digits as you choose to display.
What is the difference between megabits vs. megabytes?
Internet speeds are quoted in megabits per second (Mbps), while file sizes are quoted in megabytes (MB) — 8 megabits equal 1 megabyte, so a '100 Mbps' connection downloads at up to about 12.5 MB per second.
Where is the megabit still used today?
Used worldwide for network and internet speed ratings