256 MB to KB
256 megabytes to kilobytes
Decimal (SI) — what most people mean
256 MB = 256000 KB
Binary (IEC): 256 MB = 262144 KB
In the decimal standard (used by storage makers and Google), 1 MB = 1000 of the next unit down, so 256 MB = 256000 KB. Operating systems use the binary standard (×1024), giving 262144 KB.
megabytes to kilobytes table
Decimal (SI) values.
| MB | KB |
|---|---|
| 1 MB | 1000 KB |
| 2 MB | 2000 KB |
| 5 MB | 5000 KB |
| 10 MB | 10000 KB |
| 100 MB | 100000 KB |
| 256 MB | 256000 KB |
| 500 MB | 500000 KB |
| 1000 MB | 1000000 KB |
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 kilobytes is 256 MB?+
256 MB equals 256000 KB using the decimal (SI) standard that drive makers and Google use, or 262144 KB using the binary standard that operating systems use.
Why are there two answers?+
Storage is measured two ways: decimal (1 KB = 1000 of the next unit down) and binary (1 KB = 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.