This free tool is very intuitive to convert all currencies, weights and measures

This universal converter is a simple calculator, very easy to use, and very helpful to change measurements from/to imperial metric and universal system, but also to convert dollar to euro or yen with updated exchange rate or on offline mode while travelling, to change cup to liter while cooking, to convert liters/100 KM to British MPG, to find the perfect shoes or clothes size in every country…

How to use?

So easy! Choose the type of measure among the icons, then scroll to the two units you are looking for. The tool is ready for the unit conversion!

Here is the full list of each currency and unit included in the measurement converter :
- Weight: Once - Oz, Pound - lb, metric ton, Kilogram - kg, Gram, Milligram - mg, Stone – st
- Temprature: Celsius degre °C, Fahrenheit °F, Kelvin - K, Reaumur scale, Rankine
- Distance, lenght and size: Miles mileage, Yards - yd, Feet - ft, Inches - in, Kilometer kilometre - km, Meter Metre, Centimeter Centimetre - cm, Milimeter Millimetre - mm
- Volume, quantity et capacity: spoon, dessertspoon, tablespoon, cup, Pinte - pt, Once - flOz, Gallon - gal, Hectolitre Hectoliter, Decaliter, Litre, Deciliter - dl, Centiliter - cl, Millilitre - ml, km3, m3, cm3, mm3
- Time, duration and period: Second, Minute, Hour, Day, Week, Month, Year
- Speed: Meter/second - m/s, Kilometer/second - km/s, Kilometer/hour - km/h, Feet/second - ft/s, Miles/second - mi/s, Miles/Hour - mi/h, Knots - kts
- Computer memory, IT, RAM: bit, Kilobit, Megabit - Mb, Gigabit, Terabit, Octet, Kilobyte, Megabyte, Gigabyte, Terabyte
- Energy, power, heat and thermodynamics: Kilowatt-hour - kWh, Watt-second, MegaJoule, kiloJoule - kJ, Joule, Therm, electron-volt - eV, quadrillon (Quad), British thermal (BTU), Foot-pound, kiloCalorie - kcal, Calorie
- Fuel consumption: Liter/km - l/km, Liter per 10 kilometers - L/10km, Liter per 100 kilometers - L/100km, Km/liter, Miles/Liters, Miles per gallon - imperial mpg, gallon per 100 miles
- Electricity: Ampere - amp, MilliAmpere (mA), MicroAmpere, NanoAmpere, KiloAmpere, MegaAmpere...

And unlock even more units of measurement:
- Currency: with forex trading currency exchange rate. US Dollar ($ USD), Euro (€ EUR), Pound Sterling (£ GBP), Canadian Dollar (CAD), Swiss Franc (CHF), Australian Dollar (AUD), Japanese Yen (JPY), Indian Rupee (INR), Chinese Yuan (CNY), Singapour Dollar (SGD), Peso, BitCoin and a lot more !
- Shoes and clothes size (men, women, kids, and babies)
- Angle, force, pressure, flow

Become more effective, stop ads!

Auto-renewable subscription: Unit Converter Premium
- Full pack - 1-year renewal - USD 5.99 - available with a 7 days free trial
- Full pack - 1-month renewal - USD 0.99
- Currency pack - 1-year non-renewal - USD 0.99
- Sciences pack - 1-year non-renewal - USD 1.99
- Shoes pack - 1-year non-renewal - USD 1.99
- Clothes pack - 1-year non-renewal - USD 0.99
- Kitchen pack - 1-year non-renewal - USD 0.99
- Remove ads pack - 1-year non-renewal - USD 0.99

The total amount for the subscription period will be charged to your iTunes Account. Unless you turn it off auto-renewal at least 24 hours before the end of the subscription period, the subscription will renew automatically for the same price and will be charged on to your iTunes Account. You can manage the subscription and turn off automatic renewal in the account settings for your Apple ID at any time. Any used portion of a free trial period will be forfeited when subscribing to a non-trial plan.

Please feel free to contact me if you have any questions:

Terms of service:
Privacy policy:

Keep in mind that this application is constantly evolving. Got an idea for improvement? Can’t find a category? Please, send me an email to

I look forward to your thoughts.

What’s New

Version 2.4.20

- Fix an issue with in-app purchase
- New design, clearer user interface
- Support iOS 13
- Dark mode
- New theme for the interface.
- Let me know what you think at

Ratings and Reviews

4.5 out of 5
2.6K Ratings

2.6K Ratings

mesYngr ,

iPad/Multitasking Support

I was wondering if there were any plans for iPad landscape and multitasking support to be built into this app. I like the apps functionality, but use on an iPad is hindered because it only works in landscape and can’t be used in Split View or Slide Over. I’d even pay extra for those features. Thanks

Healthy Cuisinist ,

Poor maneuvering

When I went use this app, I needed a fraction of a cup. I went into the volume section of the app, and proceeded to enter in my data. The only problem was, there was no “.” On their built-in keypad. Instead there was a button that look like a button to go to another keypad which might contain the “.” Button. When I press this, it led me back to the main conversion type selection screen. And in the one minute that I was actually using the app, I got three different advertisements popped up in my face. This made it very cumbersome to actually get any work done. I wasn’t even able to try this stuff out because the app was not programmed in a way that makes any sense to the user.

Developer Response ,

Hello, I'm sorry about your experience. I just fix the mistake about the "." it, you will see the "." next to the "+" on the keyboard. Thank you for the feedback.

Afrayka ,

Problems with the upgrade are easily solved.

Just upgraded to the full pack with no ads but didn't initially see any changes. Contacted developer and they got back to me quickly; guided me to the settings menu in the app and Iclicked "restore in app purchases". The upgrade is all good now and this app seems like a clean, simple, and helpful tool I will no doubt use quite often. Like many, I hated the pop up ads and happy to pay for the upgrade.

Developer Response ,

Hi, please write to, I will be able to help you. You don't have to buy another pack. You can try to restore the in app purchase, it should fix the issue. I'm sorry about the inconvenience.


oWorld Software
83.9 MB

Requires iOS 10.0 and watchOS 3.0 or later. Compatible with iPhone, iPad, and iPod touch.


English, French, German, Italian, Simplified Chinese, Spanish, Traditional Chinese

Age Rating
In-App Purchases
  1. All unit conversion + No ads
  2. Premium 1 year $4.99
  3. Premium 1 month $0.99


  • Family Sharing

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

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