256 KB to MB
256 kilobytes to megabytes
Decimal (SI) — what most people mean
256 KB = 0.256 MB
Binary (IEC): 256 KB = 0.25 MB
In the decimal standard (used by storage makers and Google), 1 KB = 1000 of the next unit down, so 256 KB = 0.256 MB. Operating systems use the binary standard (×1024), giving 0.25 MB.
kilobytes to megabytes table
Decimal (SI) values.
| KB | MB |
|---|---|
| 100 KB | 0.1 MB |
| 256 KB | 0.256 MB |
| 500 KB | 0.5 MB |
| 1000 KB | 1 MB |
Convert any size
Need a different value or unit? The full data storage converter handles bits, bytes, KB, MB, GB, TB and PB.
Frequently asked questions
How many megabytes is 256 KB?+
256 KB equals 0.256 MB using the decimal (SI) standard that drive makers and Google use, or 0.25 MB using the binary standard that operating systems use.
Why are there two answers?+
Storage is measured two ways: decimal (1 MB = 1000 of the next unit down) and binary (1 MB = 1024). Hard-drive and SSD capacities are advertised in decimal, while Windows and other systems report sizes in binary — which is why a "1 TB" drive shows as about 931 GB in your operating system.