This tool uses the binary convention where 1 KB = 1024 bytes, which is what most operating systems and programming libraries use. Network equipment and some standards instead use decimal units, where 1 kB = 1000 bytes, so the two can differ by a few percent at larger sizes.
Calculator
Formula used
KB = bytes ÷ 1024 · bytes = KB × 1024 · 1 MB = 1024 KB, 1 GB = 1024 MB
How to use the Bytes to Kb Converter
- Enter a number of bytes.
- Read the value in kilobytes.
- Or enter kilobytes to convert back to bytes.
- Use the table to see the whole unit ladder at a glance.
About this tool
The Bytes to Kb Converter is built for speed and accuracy: every calculation runs in your browser, so your data never leaves your device and the result updates as you type. It works equally well on a phone, a tablet or a desktop, and it is free to use as many times as you like.
Common use cases
- Reading file sizes reported in raw bytes.
- Checking API or upload payload limits.
- Converting memory figures in logs and configs.
- Teaching the binary unit ladder.
Tips for the best result
- Use the latest figures you have - even a small change in rate or term can shift the outcome by hundreds.
- For annual figures, divide by 12 to get a monthly number you can compare with the result.
- Bookmark this page and revisit the calculation as the inputs change.
Frequently asked questions
Is a kilobyte 1000 or 1024 bytes?
Both conventions exist. This converter uses 1024, which is standard in software; networking and disk marketing often use 1000.
What comes after a kilobyte?
Megabyte (1024 KB), gigabyte (1024 MB), terabyte (1024 GB) and petabyte (1024 TB).
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