Conversions and Calculations

Financial

• Financial Calculators
  Variety of calculators including loan amortization, retirement planning and loan acceleration.
• Universal Currency Converter Interactive foreign exchange rates.

Scientific

• Chemical Calculations
  Chemical calculation programs developed by Cambridge University professor.
• Constants and Equations Pages
  In addition to information on over 1000 constants and equations, this Institute of Physics sponsored site includes conversions, the periodic table and astronomical information.
• Conversion of Units
  Institute of Chemistry site which allows you to convert between a wide selection of scientific units.
• Unit Conversion Calculators Allows you to convert between various English and metric units.

Time and Date

• Calculate Day of Week  
  Calculate the Day of the Week for a Given Date from 1 January 1583 to 31 December 4000.
• Calendar Converter
  Allows you to interconvert dates in a variety of calendars such as the Gregorian calendar, the Islamic calendar and the Hebrew calendar.
• Compute Sunrise, Sunset Worldwide
• Calculates sunrise, sunset for anywhere in the world, on any date.
• Number of Days Between Dates
• Perpetual Calendar World Time Server
  World Time Server provides local times worldwide.  It makes real time adjustments for Daylight Saving Time.