Convert length, weight, and temperature units instantly. Pick a category, choose your from and to units, and get live results as you type — including a one-tap swap button. Free, fast, and no sign-up needed.
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Results update live as you type. All conversions run locally in your browser.
How to use the Unit Converter
- Choose a category: Length, Weight, or Temperature.
- Type a value and pick your From and To units — the result updates live.
- Use the ⇄ swap button to instantly flip the conversion direction.
Frequently asked questions
Which length units are supported?
Millimeters, centimeters, meters, kilometers, inches, feet, yards, and miles — covering both metric and imperial systems.
How is temperature converted?
Using the standard formulas: °F = °C × 9/5 + 32, and Kelvin = °C + 273.15. Conversions between any pair of Celsius, Fahrenheit, and Kelvin are supported.
Is this converter accurate?
Yes — conversions use exact international definitions (for example, 1 inch = 2.54 cm exactly). Results are rounded to 6 decimal places for readability.