Convert KB to MB
Convert data storage units instantly: bits, bytes, KB, MB, GB, TB and the binary KiB, MiB, GiB, TiB — with the 1000 vs 1024 distinction made explicit.
Processed entirely in your browser — nothing you enter here is ever uploaded.
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About this tool
This page opens the data storage converter preset to kilobytes → megabytes. With decimal SI units one megabyte is exactly 1,000 kilobytes, so MB = KB ÷ 1,000: a 350 KB photo is 0.35 MB, and 12,800 KB is 12.8 MB.
Historically "KB" often meant 1,024 bytes, a convention now formally called the kibibyte (KiB), with 1 MiB = 1,024 KiB. Email attachment limits, upload forms and older software may quietly use either rule, which is why converted numbers sometimes look slightly off. This tool makes the choice explicit: use KB/MB for the decimal rule or KiB/MiB for the binary one — never a hidden mix.
People hit this conversion when checking image sizes against a "max 2 MB" upload form, estimating how many document scans fit in an email, or reading old file listings quoted in kilobytes. Enter the KB value, press Convert, and copy the megabyte result in one click.
Example. Entering 1 KiB and converting to bytes returns 1024, while 1 KB returns 1000.
Limit. Prefixes stop at terabyte and tebibyte; petabyte and larger units are absent from the factor table.