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Open →Free Unit Converter
Type a value, pick the units — the answer appears instantly. Length, weight and temperature.
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100% free · No signup · Runs entirely in your browser.
What is a unit converter?
A unit converter is a free online tool that translates measurements between units — kilometers to miles, kilograms to pounds, Celsius to Fahrenheit. Type a value and pick the units; the answer appears instantly with no signup.
What you can convert
- Length: millimeters, centimeters, meters, kilometers, inches, feet, yards, miles.
- Weight: milligrams, grams, kilograms, tonnes, ounces, pounds.
- Temperature: Celsius, Fahrenheit, Kelvin — converted with the exact formulas, not approximations.
Common conversions people search for
Kilometers to miles for travel, kilograms to pounds for fitness and cooking, and Celsius to Fahrenheit for weather and recipes are the three most-used conversions. The defaults are set to these popular pairs so most visitors get their answer in one glance.
Private by design
All math happens locally in your browser — no servers, no tracking, works offline once loaded.
Frequently asked questions
Is this unit converter free?
Yes — free forever, no signup.
How many miles is 1 kilometer?
Exactly 1.609344 kilometers per mile, so 1 km ≈ 0.621371 miles.
How do I convert Celsius to Fahrenheit?
Multiply by 9/5 and add 32. So 20°C = 68°F. The tool applies the exact formula automatically.
How many pounds is 1 kilogram?
1 kg = 2.20462 lbs.
Is the converter accurate?
Yes — it uses exact conversion factors (e.g. 1 inch = 2.54 cm exactly) and full-precision math, then rounds only for display.
Does it work offline?
Yes. Once the page loads, conversions work with no connection.
Short answer: A unit converter is a free online tool that translates measurements between units — kilometers to miles, kilograms to pounds, Celsius to Fahrenheit. Type a value and pick the units; the answer appears instantly with no signup.
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