***Free*** Unit converter App from the most popular metric conversions website in the world, Over 920 million visitors have used our website, try our app and see why we're so popular!

*Easy to use* clear interface
Works offline
All popular unit conversions (over 30,000 of them)
Over 160 currencies (including Bitcoin and other cryptocurrencies) with live exchange rates
History tab allows quick access to favourite unit converters.
Answers in fractions where needed.
Obtain conversion results with up to 8 significant digits
Imperial units split into other imperial units – so you can get a weight in stones and pounds, pounds and ounces, etc. Lengths break down into feet and inches, etc.

Stones, Pounds, Metric Tons (or Tonnes), Kilograms, Grams, Carats, Milligrams, Micrograms, Long Tons (UK), Short Tons (US), Short Hundredweights (US), Long Hundredweights (UK), Troy Pounds, Troy Ounces, Ounces, Pennyweights, Grains, Tonnes, Ton, Hundredweights.

Celsius, Fahrenheit, Kelvin, Rankine, Newton, Réaumur, Rømer, Delisle.

Kilometers, Meters, Feet, Inches, Centimeters, Millimeters, Parsecs, Lightyears, Nautical Miles (UK, US, International), Miles, Furlongs, Chains, Yards , Nautical Leagues, Microinches, Leagues (UK, US), UK Nautical Leagues, Micrometer, Microns, Nautical Miles, Decimeters.

Square Miles, Acres, Square Yards, Square Feet, Square Inches, Square Kilometers, Hectares, Square Meters, Square Centimeters, Square Millimeters, Square Micrometers, Square Microns, Square Microinches.

Cups (US, UK), Tablespoons, Teaspoons, Gallons (US, UK), Pints, Gills, Ounces ,Cubic Meters, Liters, Centiliters, Milliliters, Cubic Yards, US Barrels (Dry, Liquid, Oil, Federal), UK Barrels, US Gallons (Liquid, Dry), Cubic Feet, US Quarts (Liquid, Dry), UK Quarts, US Pints (Liquid, Dry), UK Pints, Canadian Cups, Metric Cups, US Gills, US Tablespoons, UK Tablespoons, Metric Tablespoons, US Teaspoons, UK Teaspoons, Metric Teaspoons, US Fluid Ounces, UK Fluid Ounces, Cubic Inches, Cubic Centimeters, Cubic Millimeters, Microliter, Kiloliters, Gills (UK), Barrels, Quarts.

Seconds, Minutes, Hours, Days.

Degrees, Radians, Minutes (Angular), Seconds (Angular), Centrad, Gradians, Milliradians (NATO), Milliradians (UK), Milliradians (US WW2), Milliradians (USSR), Sign

Atmospheres, Bar, Pascals, Pound Force per Square Inch, Inches of Mercury, Inches of Water, Kilogram Force per Square Meter, Millibar, Millimeters of Mercury, Millimeters of Water, Newtons per Meter Squared, Pounds per Square Foot, Torrs

Joules, Kilowatt-hours, Kilojoules, Btu, Calories, Electron-Volts, Ergs, Foot-Poundals, Foot-Pounds, Kilotons (metric), Megaelectron-Volts, Megawatt-hours, Newton-meters, Therms

All state sponsored world currencies as well as major crypto-currencies.

If you need anything added, email us at and we'll do our best to put them in for you!

What’s New

Version 1.0.6

Imperial / English unit converter bug fix
Conversion resolution improved

Ratings and Reviews

4.8 out of 5
3.3K Ratings

3.3K Ratings

Wx watcher ,


Most excellent app!!!! Please add speed conversion!!! Miles per hour, kilometers per hour, feet per second, knots, etc...... Thank you so much for offering your wonderful and user friendly app!!!!!

R. Coss ,

Metric review

I have recently started traveling to Europe and communicate with friends there and this app helps me to learn metric temperature and distance plus quickly understand what they are saying.

M Shaw ,


I can go online and look up a conversion, but this is so much faster.

It seems to cover everything.


Wight Hat Ltd
74.4 MB

Requires iOS 10.0 or later. Compatible with iPhone, iPad, and iPod touch.


English, Afrikaans, Albanian, Armenian, Azerbaijani, Belarusian, Bengali, Bosnian, Bulgarian, Catalan, Croatian, Czech, Danish, Dutch, Estonian, Finnish, French, Georgian, German, Greek, Gujarati, Hindi, Hungarian, Indonesian, Italian, Japanese, Kazakh, Korean, Lithuanian, Macedonian, Malay, Maltese, Norwegian, Polish, Portuguese, Punjabi, Romanian, Russian, Serbian, Simplified Chinese, Slovak, Slovenian, Spanish, Swedish, Tagalog, Tamil, Telugu, Thai, Traditional Chinese, Turkish, Turkmen, Ukrainian, Vietnamese, Welsh

Age Rating


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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