Converters

Units

A unit converter: length, weight, temperature and eight more categories, with no internet needed.

You can always download our app to your phone and keep it at hand.

A web version of this mode is on its way, so you'll be able to calculate right on the site with nothing to install. Until then, it's waiting for you in the app.

Like what you see? The app does the same thing, just in your favorite theme.
Download on theApp StoreiPhone, iPad, MacComing toGoogle PlayComing toAppGallery

What it calculates

Our unit converter online converts length, weight, temperature, area, volume, speed, time, data size, pressure, energy and fuel economy, in both metric and US units.

For example, miles to kilometers, pounds to kilograms, Fahrenheit to Celsius, gallons to liters, or miles per gallon to liters per 100 km. It works offline.

  • Length, weight, temperature, area, volume, speed
  • Time, data, pressure, energy, fuel economy
  • Metric and US units

How to use it

  1. Choose a category.
  2. Choose the “from” and “to” units.
  3. Enter a number.

Example

60 mph= 96.56 km/h
Calcie, “Units” mode on iPhone

FAQ

Do I need the internet?

No, everything is calculated on your device.

Is there fuel economy?

Yes: liters per 100 km, kilometers per liter and miles per gallon (US and UK).

How do I convert Fahrenheit to Celsius?

Choose the “Temperature” category, set “from” to °F and “to” to °C, and enter the number. For example, 100 °F is 37.78 °C.

Does the “Units” mode work offline?

Yes. Calcie does all its math right on your device, so the mode works on a plane, on the subway and out of town. Nothing is sent to any server, and the answer appears instantly.

Is “Units” available on iPad and Mac?

Yes. On iPad the mode has its own layout with larger fields, and on a Mac with Apple Silicon Calcie runs in its iPad version and works from the keyboard. Your Premium purchase applies on every device signed in with your Apple ID.

How do I switch to the “Units” mode?

Open the modes menu, the icon at the top left of the calculator's main screen, and choose “Units”. Calcie remembers your choice: next time the app opens right in that mode.