Byte Size Converter
Compare decimal and binary byte units with total-bit output
Enter the value and unit, then click Convert size. Scenario presets and explanations are available in Advanced mode.
The full guide also includes pitfalls, worked examples, snippets, FAQs, and related tools for checking results or troubleshooting.
About this tool
Enter a non-negative decimal size and choose its byte unit, then run the conversion. Decimal KB–TB use powers of 1000; KiB–TiB use powers of 1024. Advanced mode includes total bits and TB and TiB results. A value of 1536 MiB is 1.5 GiB or 1.610612736 GB. Fractional bytes are retained as mathematical quantities. Results use browser floating-point arithmetic and display up to 15 significant digits, with scientific notation for extreme values; they are not exact accounting for arbitrarily large integers. Empty, negative, hexadecimal and overflowing inputs are rejected. Editing the value or unit clears the old result. Inputs are processed locally and are not saved as drafts.
Production Snippets
Compare one exact unit relationship
text
Input: 1536 MiB
Bytes: 1610612736
GiB: 1.5
GB: 1.610612736
Advanced total bits: 12884901888
A transfer rate is a separate measurement.Frequently Asked Questions
How do MB and MiB differ?
1 MB is 1,000,000 bytes; 1 MiB is 1,048,576 bytes. Use the unit actually stated by the source rather than assuming every displayed MB means MiB.
Can I enter bits or calculate download speed?
Input units are bytes and their decimal or binary multiples. Total bits are an Advanced output; speed and download time require an external transfer rate and are not calculated here.
Why can a result use scientific notation?
Values are floating-point approximations shown to 15 significant digits. Scientific notation keeps small nonzero quantities visible instead of rounding every small value to zero.
Are fractional or zero sizes allowed?
Yes, including zero and mathematical fractional bytes. Negative, empty, non-decimal, overflow and underflow inputs are rejected. Fractions do not mean a file can physically contain a fraction of a byte.
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