In Windows 7, several new functions have been added. The calculator can be operated in 4 modes; Standard, Scientific, Programmer & Statistics.
Windows 7 Calculator
Its interface has been divided into three areas.
Special calculation area.
Plus if you need conversion formulas for angle, area, energy, length, power, pressure, temperature, time, velocity, volume, weight, there is also a unit conversion utility included, for converting values from one unit of measurement to another.
There are even templates for gas mileage, lease estimations, and mortgage estimations.
CalcuTray is a small and very interesting application for those who use Windows Calculator frequently, you may want to check out. RedCrab is a powersful scientifuc and statistical calculator available for Windows.
You can also Make Windows 7 Calculator work in Vista too.