Unit Converter
Miles or kilometers? Pounds or kilos? Celsius or Fahrenheit? Pick a category, type a number, and the penguin converts it both ways — instantly.
How to use
- Pick a category. Length, weight, or temperature — the unit lists swap automatically.
- Choose your units. Set the "From" unit you're converting out of and the "To" unit you want.
- Type the value. The result converts live as you type — no button to press.
- Flip it around. Hit "Swap units" to reverse the direction in one tap.
Frequently asked questions
How do I convert miles to kilometers?
Choose the Length tab, set "From" to Mile (mi) and "To" to Kilometer (km), then type your number. One mile is exactly 1.609344 kilometers — so 100 miles is 160.934 km.
Can I convert in both directions?
Yes — that's what the "Swap units" button is for. It flips the From and To units instantly so you can convert back the other way without retyping anything.
How accurate are the conversions?
Conversions use exact defined factors (like 1 inch = 2.54 cm and 1 lb = 453.59237 g) and full-precision math. Results are rounded for display, but the underlying calculation doesn't cut corners.
Does it convert temperature?
Yes — Celsius, Fahrenheit, and Kelvin, with the proper formulas (not just multiplication). Handy for recipes, weather, and science homework alike.
Is my input sent anywhere?
No. Like every tool here, the unit converter runs entirely in your browser. Your numbers never leave the page.
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