Euler’s Unit Converter Widget


Euler's Unit Converter

Simple and unobtrusive unit converter for most needs. It can be used as a regular app window but is also available any time in the Today Notification Center. Available in more than 20 languages.


  • Categories: Angle, Area, Currency, Data Units, Energy, Fuel Efficiency, Length, Mass, Power, Pressure, Speed, Temperature, Time, Timestamp, and Volume
  • Multiple converters are possible in the notification center
  • Rates for more than 40 currencies (Sources: Floatrates/Fixer)
  • Settings (in menubar) for: light and dark mode; keeping the window on top; thousands separator; decimal places
  • Share conversion via mail, messages etc.
  • Swapping of units
  • Localized to 23 languages: Arabic, Chinese (Simplified), Czech, Danish, Dutch, English, French, German, Greek, Hungarian, Korean, Indonesian, Italian, Japanese, Norwegian, Polish, Portuguese, Romanian, Russian, Spanish, Swedish, Thai, Turkish.

Requires macOS 10.11 (El Capitan) or higher. 


Screenshots


Getting Started & Help

Add widget in notification center

Open the notification center on your Mac and click on the “Edit” button at the bottom of the view. Then click on the green + button next to the Unit Converter.

Add multiple converters in notification center

Tap on the circled i button and then tap on the green + button (at the bottom of the list) to add more converters. Likewise converters can be deleted.

Change settings

In order to change the settings you have open the app (if you just use the notification center version, click on the settings icon in the Unit Converter). Go to the “View” menu item to see all settings.


What conversions are available in Euler’s Unit Converter?

Angle: Degree, Arc Minutes, Arc Seconds, Radians, Gradians, Revolutions

Area: Square Kilometer, Square Meter, Square Millimeter, Square Miles, Square Yards, Square Feet, Square Inches, Acres, Ares, Hectares

Currency: AED, AUD, BGN, GBP, BRL, CAD, CLP, CNY, CRC, HRK, CZK, DKK, EUR, GEL, GHS, HKD, HUF, INR, IDR, ILS, JMD, JPY, MXN, NGN, NOK, NZD, PEN, PHP, PKR, PLN, QAR, RON, RUB, SAR, SCR, SGD, ZAR, KRW, SEK, CHF, THB, TRT, TWD, USD

Data Units: bit, kbit, Mbit, Gbit, byte, KB, MB, GB, TB, KiB, MiB, GiB

Engery: Kilojoules, Kilocalories, Kilowatt Hours, BTUs, Foot Pounds

Fuel Efficiency: Liters per 100 Kilometers, Miles per Gallon, Miles per Imperial Gallon

Length: Millimeter, Centimeter, Meters, Kilometers, Inches, Feet, Yards, Miles, Nautical Miles, Light Years, Fathoms, Furlongs, Astronomical Units, Parsecs

Mass: Kilograms, Grams, Ounces, Pounds, Stones, Metric Tons, Short Tons, Carats, Ounces Troy, Slugs

Power: Watts, Kilowatts, Foot Pound Force Min, Foot Pound Force Sec, Metric Horsepower, Horsepower

Pressure: Newtons Per Meter Squared (Pascal), Kilopascals, Hectopascals, Inches of Mercury, Bars, Millibars, Millimeters of Mercury, Pounds per Square Inch

Speed: Meters Per Second, Kilometers per Hour, Miles per Hour, Knots, Speed of Light

Temperature: Celsius, Fahrenheit, Kelvin

Time: Years, Weeks, Days, Hours, Minutes, Seconds, Milliseconds, Microseconds, Nanoseconds

Timestamp: Unix, ISO 8601, RFC 2822, SQL

Volume: Cubic Meter, Cubic Feet, Liters, Milliliters, Gallons, FluidDrams, Fluid Ounces, Pints, Quarts, Cups, Tablespoon, Teaspoon


Frequently Asked Questions

How often are the currencies updated?
Currencies are provided by ECB (European Central Bank) and FloatRates, and updated once a day.

Why the name Euler?
Leonhard Euler (1707 – 1783) was a Swiss mathematician born in Basel, which is also the hometown of the developers.


Version History

V1.9.2 – 22nd October 2019

  • Added to currency category: PKR, NGN
  • Added to length category: pixel, points

V1.9.1 – 6th October 2019

  • Fixed 24hr bug in ISO 8601 conversions (timestamps category)

V1.9 – 12th September 2019

  • Added new category “Timestamp” (converts between unix, ISO 8601, RFC 2822, and SQL formats)
  • Added currency: Georgian Lari (GEL)
  • Improved translations

V1.8.1 – 8th August 2019

  • List in widget can now be edited (to change order of converters)
  • Improved darkmode support
  • Improved touchbar support

V1.8 – 22nd July 2019

  • Widget now supports multiple parallel conversions
  • Added currency SCR, length units

V1.7 – 25th February 2019

  • Added currencies CRC, JMD, PEN
  • Fixed service for alternative currency source

V1.6 – 7th October 2018

  • Added possibility to swap units for even easier conversions
  • Fixed some layout issues

V1.5 – 20th September 2018

  • Support for macOS Dark Mode
  • Added currency: Ghanaian Cedi

V1.4.2 – 29th June 2018

  • Added “Data Units” category
  • Added to category “Volume”: Imperial Gallons

V1.4.1 – 4th April 2018

  • Added currency: New Taiwan Dollar

V1.4 – 31th January 2018

  • Added “Time” category

V1.3 – 26th April 2017

  • Added additional currency source with AED, CLP, QAR, SAR
  • Increased country flags size

V1.2 – 7th April 2017

  • Added localizations for: Indonesian, Romanian
  • Add touch bar support for settings
  • Fixed currency loading timeout

V1.1 – 25th March 2017

  • Added localizations for: Arabic, Chinese (Simplified), Czech, Danish, Dutch, Greek, Hungarian, Korean, Polish, Russian, Thai, Turkish

V1.0 – 19th March 2017

  • Initial Version