Unit Converter
Convert length, weight and temperature units instantly, right in your browser.
🔒 Processed locally in your browser
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How to use
- Choose a category: Length, Weight or Temperature.
- Enter the value you want to convert.
- Pick the "From" and "To" units — use the swap button to flip them instantly.
- The converted result updates live as you type.
Features
- Length, weight and temperature conversions
- Correct temperature formulas (not a simple ratio) for Celsius, Fahrenheit and Kelvin
- One-click swap between the "From" and "To" units
- Results formatted for your language and region
- 100% client-side — your numbers never leave your browser
Frequently asked questions
Which units are supported?
Length: millimeters, centimeters, meters, kilometers, inches, feet, yards and miles. Weight: milligrams, grams, kilograms, ounces and pounds. Temperature: Celsius, Fahrenheit and Kelvin.
Why is temperature different from the other categories?
Length and weight units convert by multiplying by a fixed ratio, but Celsius, Fahrenheit and Kelvin use different zero points, so temperature conversion needs its own formula rather than a simple ratio.
How precise are the results?
Results are shown with up to 8 significant digits, formatted using your browser's language settings.
Are more unit categories coming, like area or volume?
This first version covers the most commonly used length, weight and temperature units. More categories such as area, volume, speed and data storage are planned for a future update.