Convertor for Android

App Features

Fast, Efficient Operation

Phone screen shot

Every aspect of Convertor has been designed to make the process of converting measurements fast and easy. At its heart, it's built around the familiar metaphor of the pocket calculator: tap in some numbers and they appear on the display.

The difference here, of course, is that there's more than one display. Whatever number you enter is instantly converted into the units you've selected. There's no extra work, no "Convert" button to press. It just happens.

Mixed Units

Another key feature of Convertor is the ability to convert directly to and from mixed units, such as feet+inches or pounds+ounces. No need to multiply anything out, or try to remember just how many feet are in a mile. Convertor does it all for you.

If you're entering numbers into a mixed-unit field, as shown here, just hit the +… button (in the lower left) to switch down to the smaller unit. To go back up to the parent unit, press the DEL button – it's the same principle as deleting decimal digits, and it works completely naturally.


For any of Convertor's display fields, you can switch between decimals (like 1.5) and fractions (like 1½) by tapping the DecFrac control at the upper-left of the field. Then when editing fractions, just use the / button in the lower left of the key pad to move between the parts of the fraction. You'll find it's very intuitive to use.

And Convertor takes care of the rest. Any fractions you enter are, well, converted – just like anything else. Or enter decimal values into a different field, and see their fractional equivalent. So simple!

Calculator Functions

The pocket-calculator metaphor continues with the app's arithmetic functions. Nothing complicated, just handy: the operations are applied to the units in the display, exactly as you'd expect.

Landscape screen shot


Like most Android apps, additional options are available in the settings screen (accessed through an icon on the app's title bar, or your device's Menu key, if it has one). Here you can alter a variety of Convertor's functions to suit your own preferences.

Convertor has five skins to choose from: material light/dark, holo light/dark, or classic gray. By default the app is designed to use the appearance that best matches the Android version on your phone, but you can override this in the Settings if you prefer.

Classic Gray theme

Tablet Support

Convertor is ready for use on Android tablets, making use of the bigger screen by showing you more units at once than you'll get on smaller phones.


Convertor is available as a free app, and it gives you the choice: either enable ads for the full suite of units and functionality, or go ad-free for a more limited, "trial" edition. The latter choice limits the app to only four unit categories (see next section), and disables the calculator functions.

If you need to convert units frequently, however, you also can have the best of both worlds – full functionality without ads – by purchasing Convertor Pro for only US $0.99.

Supported Units

With ads turned off, Convertor Free still gives you the four most commonly used unit categories:

Enable ads, or purchase Convertor Pro, for a large range of additional unit types:

Convertor also supports Chinese units for the following categories:

as well as Hong Kong units for:

If there are other categories you'd like to convert, or more units within an existing category, please e-mail and let me know.

* Convertor's currency category lists the reference rates published daily by the European Central Bank. This list includes:

The app was also written to use rates from the Bank of Canada, but the exchange rate data feed we were using was discontinued on 28 April 2017. Unfortunately, there's no easy fix for this; we're looking at several options, but can't make any promises as to timeframe. In the meanwhile, any currency rates not supplied by the ECB will be "stuck" on their April 28 rates. These include:

Please be aware that the rates are based on data published by specific central banks, so additional currencies can't just be added ad-hoc, sorry. Also, please note that this is a "casual" currency convertor; advanced currency tools are beyond the scope of this app.