General Reference: Calculators and Calendars

Calculate mortgage payments, auto loans, credit card debt, retirement savings, college savings, taxes, and more.

Compare the cost of living in two different U.S. locations.

Convert the value of one form of currency to another. Also find live exchange rates.

Provides a summary of conversion factors for various types of units as well as a conversion calculator.

Calculate how much interest is paid on an amount borrowed over a selected time period.

Convert units, including fractions to decimals and those related length, temperature, speed, volume, weight, cooking, area, fuel economy, currency, and more.

From timeanddate.com. Type in a year and choose a country. The calendar generated will show holiday and observance dates relevant to the country you selected.

Enter a date on the Gregorian calendar and find the corresponding date on the Hebrew calendar, or enter a date on the Hebrew calendar and find the corresponding date on the Gregorian calendar.

Create a calendar for any year on the Gregorian calendar beginning with 1583. Also find out what happened in history on a particular date and in a particular year.

Enter a date on the Gregorian calendar and find the corresponding date on the Islamic (Hijri) calendar, or enter a date on the Islamic calendar and find the corresponding date on the Gregorian calendar.