Conversion Calculator‪.‬ 4+

Currency, measures..‪.‬

oWorld Software

Designed for iPad

    • 4.6 • 9.5K Ratings
    • Free
    • Offers In-App Purchases


This unit converter easily changes all currencies, weights, sizes, distances and measurements. If you can use a calculator, you can use this simple tool to get precise results.

It will be the only tool you need to answer all your conversion questions.

Always has real-time currency conversions live on the app. Never miss a currency beat!

For cooks, contractors, DIY-ers, and anyone that needs a quick and easy conversion of temperature, length, volume, or international currencies.

How to use?

Choose the type of unit you would like to convert from the icons, then scroll to the two units you are looking for. That's it!

Here is the full list of each currency and unit included in the measurement converter :

- Weight: Ounces (Oz), Pounds (lbs), Metric tons, Kilograms (KG), Gram, Milligram (MG), Stone (St)
- Temperature: Celsius (°C), Fahrenheit (°F), Kelvin (K), Reaumur scale, Rankine
- Distance, length and size: Miles to kilometers, yards to meters, feet to meters, inches to centimeters, kilometer to miles, meters to yards, centimeters to inches, millimeters to inches
- Volume, quantity and capacity: Tablespoon (Tbs), teaspoon (Tsp), Cup, Pint (Pt), Once (flOz), Gallon (Gal), Liter (Lt), Deciliter (Dl), Centiliter (Cl), Millilitre (Ml), km3, m3, cm3, mm3
- Time, duration and period: Seconds, Minutes, Hours, Days, Weeks, Months, Years
- Speed: Meters per second (M/s), Kilometer per second (km/s), Kilometer per hour (Km/h), Feet/second (Ft/s), Miles per second - (Mi/s), Miles per hour - (Mph), Knots per second (Kts)
- Computer memory, IT, RAM: bit, Kilobit, Megabit to Gigabits (Mb to Gb), Gigabits to Terabits (Tb), Octet, Kilobyte, Megabyte, Gigabyte, Terabyte
- Energy, power, heat and thermodynamics: Kilowatt-hour - kWh, Watt-second, MegaJoule, kiloJoule - kJ, Joule, Therm, electron-volt - eV, quadrillion (Quad), British thermal (BTU), Foot-pound
- Fuel consumption: Liters per kilometers (L/km), Liter per 10 kilometers (L/10km), Liter per 100 kilometers (L/100km), Kilometers per liter, Miles per liters, Miles per gallon (Mpg)
- 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

Don't want ads? We have Converter Premium.

Auto-renewable subscription: Unit Converter Premium
- Full pack - 1-year renewal - USD 9.99 - available with a 7 days free trial
- Full pack - 1-month 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

What’s New

Version 2.6.74

Add GPS coordinate Conversion

Ratings and Reviews

4.6 out of 5
9.5K Ratings

9.5K Ratings

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.

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.

LFdeG ,

This app is huge - literally

I was trying to convert inches to mm and found it. But is has so many other uses I was floored. Fractions of an inch would be nice but you can just divide to come up with a decimal. Easy and intuitive to use. Although they could make it easier to find the destination units. Support is outstanding


Conversion Calculator Pro - 1y
Conversion Calculator Pro - 1y
No Ads + all units + Premium support
Free Trial

In-App Purchases

Convert all units + No ads
Convert all units + No ads
Currency, angles, forces, etc... + No ads

App Privacy

The developer, oWorld Software, 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 Used to Track You

The following data may be used to track you across apps and websites owned by other companies:

  • Identifiers
  • Usage Data
  • Diagnostics

Data Linked to You

The following data may be collected and linked to your identity:

  • Location
  • Identifiers
  • Usage Data

Data Not Linked to You

The following data may be collected but it is not linked to your identity:

  • Usage Data
  • Diagnostics

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


  • Family Sharing

    Some in‑app purchases, including subscriptions, may be shareable with your family group when Family Sharing is enabled.

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