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📏 Unit Converter
A general-purpose unit converter covering length (m, ft, mi), weight (kg, lb), temperature (C/F/K), area, volume, speed, time, and energy. Both metric and imperial.
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Examples
Common length
Input
6 ftOutput
1.83 m · 72 in · 1.83 ydTemperature
Input
100°FOutput
37.78°C · 310.93 KCooking
Input
1 cupOutput
~237 ml · ~16 tbsp · ~48 tspFrequently asked questions
Is the temperature conversion linear?
No — Celsius and Fahrenheit have different zero points. C = (F − 32) × 5/9. Kelvin is just C + 273.15.
US vs UK gallons?
Different! US gallon = 3.785 L, UK (imperial) gallon = 4.546 L. We use US measures by default for volume.
Length precision?
We show 4-8 significant digits. Pure conversion factors are exact integers; physical constants (calorie to joule, knots) carry small rounding.
About this tool
Unit Converter runs entirely in your browser using standard Web APIs. No data is sent to any server. The source for this tool is in our public GitHub repository.
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Why this tool
vs typical free web-tool sites
| 1vw | Typical free site | |
|---|---|---|
| Price | Free | Free |
| Signup required | No | Often (for premium features) |
| Ads inside the tool | No | Yes (banner + video) |
| Data sent to server | No (browser-only) | Yes (inputs analyzed for ads) |
| Total tools | 96 | Often <20 or scattered across sites |
| Bookmarkable URL per tool | Yes | Mixed |
| Loads in under 1s | Yes (static) | Often slow (ad tracking) |
| Multilingual | EN / ES / PT / FR / DE | Usually EN only |
| Open source | Yes | No |