Number base converter
Convert integers exactly between bases 2–36, including negative and very large values, with common base results shown together.
Unit converter
Convert length, mass, area, volume, temperature, speed, data size and time, with editable values on both sides.
About this tool
Check which unit system your source uses before converting. Input accepts a decimal point or the current language’s decimal separator, without thousands separators.
How to use
Choose a measurement and two units, then type on either side. Other common conversions appear below. US and Imperial gallons and fluid ounces are kept distinct.
Data units kB and MB use powers of 1,000; KiB and MiB use 1,024. B means bytes, while bit means bits. Temperatures below absolute zero are rejected. Results show up to 12 significant digits. Use a decimal point or scientific notation for input.
You can also use the current interface language’s decimal separator. Do not enter thousands separators. Editing either side updates the other without rewriting the field you are typing in.
Common questions
Why do MB, MiB and bits give different values?
MB uses powers of 1,000; MiB uses 1,024. B means bytes, and one byte contains eight bits. Match the units actually stated for your file, device or bandwidth.
Which gallon should I choose?
Match the source: one US gallon is 3.785411784 L, while one Imperial gallon is 4.54609 L. US and Imperial fluid ounces also differ; the name alone is not enough.
Can I paste a number with thousands separators?
Remove grouping separators first. A decimal point or the interface language’s decimal separator is accepted. Linked fields show up to 12 significant digits; this is not arbitrary-precision arithmetic.
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