1 km = 0.621371 mi
0.621371
miles
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Unit Converter — Free Online Tool
Convert length, weight and temperature in real time — no buttons, no waiting. Results update as you type. Everything happens on your device; nothing you enter ever leaves your browser.
Live conversion
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Works offline
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How it works
- 1Pick a category — length, weight or temperature.
- 2Type a value and choose your from and to units.
- 3See the result live — it updates as you type.
Frequently asked questions
Is the conversion accurate?
Yes. Standard conversion factors are used (e.g. 1 inch = 2.54 cm exactly, 1 lb = 453.59237 g), and results are shown to 6 significant decimals.
Which units are supported?
Length: mm, cm, m, km, inch, foot, yard, mile. Weight: mg, g, kg, oz, lb, ton. Temperature: Celsius, Fahrenheit, Kelvin.
Does it work offline?
Yes. Once the page is loaded, all calculations run locally in your browser — no internet needed, and nothing you enter is ever sent anywhere.