Calculators

Current Value of Old Money
Answers the question: "how much would a specified amount of money at a certain period of time be worth today?"
http://www.ex.ac.uk/~RDavies/arian/current/howmuch.html

GPA Calculator
Calculate GPA with this online form provided by Arkansas State University Advisement Services.
http://www.clt.astate.edu/advising/students/Jill%20Calc.html

iFigure
A collection of calculators for living, money, business, mathematics, science and engineering.
http://www.ifigure.com/

The Inflation Calculator
Adjusts any given amount of money for inflation according to the Consumer Price Index 1800-2001. Created and maintained by S. Morgan Friedman.
http://www.westegg.com/inflation/

What's a Dollar Worth?
Give a dollar amount for a particular year and find out what that amount is worth in another year. Hosted by the Federal Reserve Bank of Minneapolis.
http://minneapolisfed.org/Research/data/us/calc/