File Size Converter
File sizes are shown in two systems. Storage makers count in thousands, and many computers count in powers of 1024. This converter shows both, so a file size on one screen matches what you see on another.
- Free
- Works offline after your first visit
- Saves on this device
- No sign-up
- Updated
How it works
Kilobytes and megabytes are counted in thousands: one megabyte is 1000 kilobytes. Mebibytes and gibibytes count in powers of 1024: one mebibyte is 1,048,576 bytes.
To convert, the size in megabytes is multiplied by 1000 for kilobytes, then divided by 1,048,576 for mebibytes or by 1,073,741,824 for gibibytes after the byte count is worked out.
Worked example
A 700 MB file is 700,000 KB in the decimal count, or 667.6 MiB in the binary count, which is 0.652 GiB.
Questions
Why does my file look smaller on my computer?
Your computer often shows sizes in powers of 1024, while the file was labelled in thousands. The file is the same size, only the unit is different.
What is the difference between MB and MiB?
MB counts one million bytes. MiB counts 1,048,576 bytes. The gap is about five percent at this size.
Which unit should I use?
Use the one your screen shows. If you are comparing a download to your storage, check which system each one uses.
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