Megabytes (MB)
The megabyte (MB) is 1,000,000 bytes under the SI (decimal) definition used by storage manufacturers, network equipment and macOS.
Convert megabytes to any data unit
1 megabyte = 0.001 gigabytes
Quick facts
- Unit
- Megabyte (plural: megabytes)
- Symbol
- MB
- Measures
- Information / Data
- System
- Decimal (SI)
- Equals
- 1,000,000 bytes
- Definition
- 1,000,000 bytes (10^6), the SI definition.
1 megabyte in other units
| Gigabytes | 0.001 GB |
| Bytes | 1,000,000 B |
| Terabytes | 0.000001 TB |
| Bits | 8,000,000 bit |
| Kilobytes | 1,000 kB |
| Gigabits | 0.008 Gbit |
| Megabits | 8 Mbit |
| Terabits | 0.000008 Tbit |
What is a megabyte?
The megabyte (MB) is 1,000,000 bytes under the SI (decimal) definition used by storage manufacturers, network equipment and macOS. Windows still reports sizes with 1024-based units but labels them MB, which is why a new drive shows less space than advertised. The binary counterpart is the mebibyte (MiB).
Where the megabyte sits among data units
The megabyte is number 24 of 64 on our scale of data units, ordered from smallest to largest.
Megabytes in real life
- A smartphone photo is about 3–5 MB; an MP3 song about 4 MB.
One megabyte is about 13 short emails, or about 68% of a 3.5-inch floppy disk, or about 33% of a smartphone photo, or about 25% of an MP3 song.
Top megabyte conversions
Common amounts of megabytes
- 0.1 MB
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Convert megabytes to all 63 other units
Bits & bytes
- MB to B
- MB to bit
- MB to nibble
- MB to o
- MB to block
- MB to word (16-bit)
- MB to DWORD
- MB to QWORD
- MB to crumb
- MB to memory page
- MB to octaword
Decimal (SI)
- MB to GB
- MB to TB
- MB to kB
- MB to Gbit
- MB to Mbit
- MB to Tbit
- MB to kbit
- MB to PB
- MB to Pbit
- MB to EB
- MB to Ebit
- MB to ZB
- MB to YB
- MB to Zbit
- MB to Ybit
- MB to QB
- MB to RB
- MB to Qbit
- MB to Rbit
Binary (IEC)
- MB to GiB
- MB to MiB
- MB to KiB
- MB to TiB
- MB to PiB
- MB to Gibit
- MB to Mibit
- MB to EiB
- MB to Kibit
- MB to Tibit
- MB to YiB
- MB to ZiB
- MB to Pibit
- MB to Eibit
- MB to Yibit
- MB to Zibit
Legacy binary (JEDEC)
Information theory
Media & everyday comparisons
Convert to megabytes
Frequently asked questions
What is a megabyte?
The megabyte (MB) is 1,000,000 bytes under the SI (decimal) definition used by storage manufacturers, network equipment and macOS.
How is the megabyte defined?
1,000,000 bytes (10^6), the SI definition.
How many gigabytes are in a megabyte?
One megabyte equals 0.001 gigabytes.
How many bytes are in a megabyte?
One megabyte equals 1,000,000 bytes.
How many terabytes are in a megabyte?
One megabyte equals 0.000001 terabytes.