ConvertThat

ConvertThat is a unit conversion application with a twist. After each operation, it displays silly jokes, including knock-knock jokes.

As far as measurement units are concerned, it supports length, temperature, area, velocity, mass and weight, volume, pressure, time, acceleration, force, force per length, power, and energy.

This is a Metro app specially designed for computers with Windows 10, 8 and 8.1. It's signed by Microsoft, so it can be downloaded and installed from the Windows Store with minimum effort on your behalf.

When it comes to the interface, ConvertThat has a dark background with blue and pink buttons, making its appearance pleasant overall.

You can scroll the list of available unit categories on the bottom (pink buttons) and click one to view the units you can convert (blue buttons).

For example, when it comes to length, you can convert between meters, centimeters, millimeters, nanometers, kilometers, feet, inches, yards, angstroms, astronomical units, and calibers. Some crazy units are displayed too, such as Olympic pool (length), Boeing 747 (length), football fields, marathons, Empire State buildings, Great Wall of China, and light years.

After selecting the input and output unit, enter the value (the decimal point is supported), and click the Convert That! button. The resulted value is instantly calculated and displayed on the bottom.

The jokes are displayed on the upper-right corner after each conversion. However, you can turn them off if they disturb you, or change their frequency. Also, it's possible to capture everything to an image that you can share with a friend using Twitter, Microsoft OneNote, or another Modern UI app you have installed.

ConvertThat offers a practical and fun solution for performing unit conversions using regular and crazy units, as well as for getting amused with silly comments.