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, and Volume
- Rates for 37 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 10.10 (Yosemite) or higher.
Getting Started & Help
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.
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, GHS, HKD, HUF, INR, IDR, ILS, JMD, JPY, MXN, NOK, NZD, PEN, PHP, PLN, QAR, RON, RUB, SAR, 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: 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
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.
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