Conversion Calculator is the super swiss army knife of unit & currency conversions.

-Length, weight ,speed, area, time, pressure, volume, power, fuel, temperature, data and currency categories.

-Store and update currency exchange rates automatically(once every day) and immediately.

-160 Currencies to choose from!

-Alphabetical links are at the side to quickly access units without scrolling the entire list.

-Launch the category from the start.

-Now Updated for the iPhone X

-Works in split screen mode on iPad

What’s New

Version 0.5.5

Fixed currency not showing

Ratings and Reviews

4.7 out of 5
8.8K Ratings

8.8K Ratings

MaryMc ,

the best conversion app I’ve found

I had probably tried half a dozen other apps for converting units of measure. They were all klunky and hard to use, with an awkward interface that made it difficult to switch between different kinds of measurements. This one is the first I found that’s really well-designed and intuitive. It’s easy to find the one I’m looking for and easy to switch to another. Definitely a keeper!

Developer Response ,

Thanks for the review. We are working on a newer interface that will be even better. If you are interested in testing it, please email us in the settings-> feedback. We will add you to the beta test!

Bill Boah ,

Like the old version better

Wish it was like the old version where you didn’t have to change back and forth between units. For example, the in the old version you could switch from millimeter to inches and back simply by clearing and entering values on either side. Now you have to scroll up or down to find millimeters or inches each time you want to switch values.

Bubbadacat ,

Nice app

I installed this app when my wife and I visited Peru. We used it a lot there. It's very easy to use.
Since then I continue to use it more than I thought I would. You just never know when you will need to convert liters to ounces or inches to meters. Or more often I convert foreign currency to dollars when watching TV. The rates constantly update.
I love it.


Yan Liong Tan
24 MB

Requires iOS 9.3 or later. Compatible with iPhone, iPad, and iPod touch.



Age Rating


  • Family Sharing

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

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