Windows 7 calculator looks just like Vista's
version, but explore the Mode menu and you'll see powerful new
Statistics and Programmer views. And if you're clueless about bitwise
manipulation, then try the Options menu instead. This offers many
different unit conversions (length, weight, volume and more), date
calculations (how many days between two dates?), and spreadsheet-type
templates to help you calculate vehicle mileage, mortgage rates and
more.
Scientific Calculator
Programmer Binary, Hex Values, Bytes
Scientific Calculator
Calculate, Angle, Area, Energy, Length, Pressure Temperature, Time, Velocity, Volume, Weight/Mass
Calculate Stats
Calculate Dates
Calculate Mortgages, Leases, Fuel Economy