ESBUnitConv Pro 

Unit Conversion Software for Windows to easily convert between 552 units of measurement. Includes Units for Temperature, Distance, Mass, Area, Volume, Pressure, Velocity, Acceleration, Force, Energy, Power, Fuel Consumption, Flow and more.
unit conversion conversion calculator measurement distance area mass volume power energy velocity acceleration fuel consumption

ESBUnitConv 

User friendly Win32 FREE Utility to easily convert between 449 units of measurement. Includes Units for Temperature, Distance, Mass, Area, Volume, Pressure, Velocity, Acceleration, Force, Energy, Power, Fuel Consumption and more.
conversion calculator units measurement distance area mass volume power energy velocity acceleration fuel consumption