| Kilometers (km) | Miles (mi) |
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This unit converter is built for quick everyday checks when you move between US, UK and European measurements.
The interface is designed to be simple: pick a pair, type a number, and the matching unit updates immediately. Normal mode shows the most common conversions like meters to feet, miles to kilometers and kilograms to pounds; Expert mode unlocks more technical pairs for science, engineering and detailed calculations.
You can freely edit either side, see a small quick-reference table, and switch between popular and advanced units without reloading the page.
Convert between miles and kilometers, feet and meters, pounds and kilograms, liters and gallons, Celsius and Fahrenheit, steps and kilometers, and more.