How accurate are the conversions?

Exact, within normal floating-point rounding. Length, weight, area, volume and speed use standard conversion factors, and temperature uses the correct formulas (not factors) for Celsius, Fahrenheit and Kelvin.

Why does temperature need special formulas?

Most units convert with a simple multiplier, but temperature scales have different zero points. Converting °F to °C needs (°F - 32) × 5/9, not a plain factor - this tool handles that automatically.

Can I convert cooking measurements?

Yes. The volume category includes cups, tablespoons, teaspoons, fluid ounces, milliliters and liters, which covers most cooking conversions.

Does the converter work offline?

Once the page has loaded, yes. All math runs in your browser, so no internet connection is needed after that.

Is the unit converter free?

Yes - unlimited conversions, no sign-up, no ads on the tool itself.

Calculators

Unit Converter

Need 5 miles in kilometers or 350°F in Celsius? Pick a category, enter a value, and get the answer instantly.

Value

From

1 Kilometers (km) =

0.621371

Miles (mi)

Also equals

Private by design: This tool runs entirely in your browser. Nothing you type or upload is sent to a server.

How to use Unit Converter

Pick a category. Choose length, weight, temperature, area, volume or speed.
Enter your value. Type the number you want to convert.
Choose the units. Set the unit you are converting from and the unit you want to convert to.
Read the result. The converted value appears instantly, with common equivalents listed below.

Unit Converter Features

6 categories: length, weight, temperature, area, volume and speed
Metric and imperial units side by side
Correct temperature math for °C, °F and Kelvin
Common equivalents shown with every result
Swap units with one click
Runs fully in your browser - no sign-up

Unit Converter Frequently asked questions

: Exact, within normal floating-point rounding. Length, weight, area, volume and speed use standard conversion factors, and temperature uses the correct formulas (not factors) for Celsius, Fahrenheit and Kelvin.
: Most units convert with a simple multiplier, but temperature scales have different zero points. Converting °F to °C needs (°F - 32) × 5/9, not a plain factor - this tool handles that automatically.
: Yes. The volume category includes cups, tablespoons, teaspoons, fluid ounces, milliliters and liters, which covers most cooking conversions.
: Once the page has loaded, yes. All math runs in your browser, so no internet connection is needed after that.
: Yes - unlimited conversions, no sign-up, no ads on the tool itself.

Unit Converter

Also equals

How to use Unit Converter

Unit Converter Features

Unit Converter Frequently asked questions

Related tools