Metric Conversion tool 4+

Unit converter and information

Wight Hat

Designed for iPad

    • 4.8 • 13.8K Ratings
    • Free



Free unit converter from the most popular metric conversions website in the world,

***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
13.8K Ratings

13.8K Ratings


Wonderful app

This is an amazing app for converting metric to standard ISO and ISO the metric. I watch a lot of shows from other countries that use the metric system, but in America where I grew up, we’ve always used the standard and ISO systems. I’ve used this app so often I’ve learned most of the conversions for length, weight, currency, and many other conversions. The app also includes formulas for conversion. I love it, and highly recommend it.

xanderbilt ,

Yes!!!!Finally!!!! It just simply does what you need it to do!!!

It is ridiculous how much time I spent trying to convert ft/lb to Nm! Should be simple, just look it up! Right! So many unit conversion apps but none of the ones I had would do this simple function. Until I found this one! It was so freaking fast!!

Live2run11 ,

Works well, with no spying on me

An app that doesn’t collect my usage data? I didn’t know that still existed - yay! Works well - no complaints. The ads are tolerable, though I might pay to remove them if that was an option. Well done app - thanks!

App Privacy

The developer, Wight Hat, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy.

Data Not Collected

The developer does not collect any data from this app.

Privacy practices may vary, for example, based on the features you use or your age. Learn More

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