Unit Converter — Free Online Tool
Enter a value in any unit and see all equivalents instantly across length, weight, area, volume, speed, and data size categories. 50+ units including metric, imperial, and digital storage. Results update in real time with no button clicks needed.
100% client-side. No uploads. Your data never leaves your browser.
How to use Unit Converter
- Select a category (Length, Weight, Area, Volume, Speed, or Data).
- Choose the source unit from the dropdown.
- Enter a value.
- All equivalent values appear instantly in the results grid.
Frequently Asked Questions
What unit categories are supported?
Length (mm to miles), weight (mg to tons), area (mm² to square miles), volume (mL to gallons), speed (m/s to Mach), and data size (bit to petabyte).
Are data sizes in binary (1024) or decimal (1000)?
Standard SI prefixes (KB, MB, GB) use 1024 base in this tool, matching how operating systems report file sizes. IEC prefixes (KiB, MiB, GiB) are also available.
How precise are the conversions?
Results are shown to 7 significant figures to cover both large and small values accurately. Scientific notation is used for very large or very small numbers.
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