Mebibytes to Kilobytes Converter

About the mib to kb calculation

One mebibyte is exactly 1,048.58 kilobytes, so converting between them is a single multiplication. Enter any value above and the result updates as you type. Binary megabyte — 1,024² bytes. What operating systems usually mean when they display "MB". Decimal kilobyte — 1,000 bytes. Windows and macOS often mean 1,024 when they write "KB".

Formula

KB = MiB × 1,048.58

1 MiB = 1,048.58 KB
1 KB = 0.00095367 MiB

Worked example

To convert 500 MiB, multiply by 1,048.58: 500 × 1,048.58 = 524,288 KB.

Frequently asked questions

How many kilobytes are in a mebibyte?

There are 1,048.58 kilobytes in one mebibyte. To convert any amount, multiply the number of mebibytes by 1,048.58.

How do I convert kilobytes back to mebibytes?

Divide instead of multiplying, or equivalently multiply by 0.00095367. One kilobyte is 0.00095367 mebibytes.

Is this conversion exact?

Yes, provided both sides use the same convention. Decimal units (KB, MB, GB) are powers of 1,000 and binary units (KiB, MiB, GiB) are powers of 1,024. Both are exact — the confusion comes from software labelling binary values with decimal names.

Where is each of these units used?

Mebibytes: binary megabyte — 1,024² bytes. What operating systems usually mean when they display "MB". Kilobytes: decimal kilobyte — 1,000 bytes. Windows and macOS often mean 1,024 when they write "KB".

Sources

• IEC 80000-13 — binary and decimal prefixes for information units