Calculators, Converters  

Bankrate's handy set of calculators, including Mortagage Payments, Fixed vs. Adjustable Rate? and Rent or Buy?

Calculation and Conversion Tools
A group of useful and interesting links, including basic resources like AskNumbers, plus specialized ones like the Roman Numeral Date Conversion Table.

Calculators and Formulas
Links to resources for personal finance, education, energy costs, salaries, inflation, data powers of ten and Statistics Every Writer Should Know. From Best Information on the Net.

Constants, Equations, Conversions and Symbols 
A collection of hundreds of scientific and technical constants, equations and related information.

Edmund's Auto Loan Calculator
Instantly calculate your monthly auto payments based on down payment, loan amount, interest (APR), and loan term.

Expedia Currency Converter
Convert over two hundred currencies from the Albanian Lek to the Zambian Kwachas. Updated regularly. See also the Historical Currency Converter from Oanda.com.

Inflation Calculator
What is $100 in 1965 worth today? Enter an amount, initial and final years and it does the rest. See also Debt to the Penny for historical debt figures back to 1791

Math.com Online Calculators
Basic, scientific, trig, finance, prime number, percentage, vector, student loan, and more at this handy site.

The Salary Calculator
Can I afford to live in Iowa City? New York? Enter your current salary and city of residence and calculate, according to cost-of-living differences, what you'll need to make where you're moving (includes all 50 states and DC.).

Unit Conversion Tool
This handy page allows you to do what the Federal Government can't: convert to metric. Separate searches for distance, area, volume, mass, speed, temperature, pressure, energy, power, and force.

Time Zone Converter
Is it today to tomorrow in Jakarta? Speculate no longer. Simply provide the time zone, time and date to convert from, and the time zone to convert to.