When the Windows operating system is installed on your computer, a simple calculator program that you can use to perform standard mathematical functions also gets installed. However, your legal copy of Windows also entitles you to download a fancier calculator program. It is called Microsoft Calculator Plus. Get it here for free
The standard calculator.
Calculator Plus does everything the standard Microsoft Calculator does but also enables you to convert one type of units to another, a useful feature for businesses with international relationships. You can calculate conversions for:
Fuel consumption (engines)
For currency calculations, you can add currencies to the default list that is installed. The calculator also includes a tool that will automatically update the exchange rate for the Euro by downloading it from the European Central Bank (ECB).