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Calculators

Calculating Numbers & More

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Math Calculators

Math.com: Mathematical Calculators Online: Basic, Scientific, Square Root, Circle, Prime Numbers, Quadratic Equations, Percentages, Trigonometry, Probability, Finance
Metacalc: Simple basic math operations (add, subtract, multiply, divide, square roots, etc.). Large print mode available (click the magnifying glass icon on the top right side of their page).
Scientific Calculator Online: From EEweb Electrical Engineering Community.

Other Calculators

Bankrate.com Calculators: Specialized calculators for various topics including: mortgages, automotive/cars (loans, leasing, payments, down payments), credit cards, investments, home equity, retirement, savings, college financing.
The Calculator Site: Includes Finance Calculators, Unit Conversion, Health Calculators and Other Calculators.
Carbon Footprint Calculator: "The calculator estimates your footprint in three areas: home energy, transportation and waste." From the Environmental Protection Agency (EPA).
CPI Inflation Calculator: "The CPI inflation calculator uses the average Consumer Price Index for a given calendar year. This data represents changes in prices of all goods and services purchased for consumption by urban households. This index value has been calculated every year since 1913. For the current year, the latest monthly index value is used." From U.S. Bureau of Labor Statistics (BLS).
Food-o-Meter: Food Calorie Calculator: "Find nutrition facts including calories, fat, carbohydrates, protein, sugar, fiber in over 37,000 foods and beverages." From WebMD.com.
Health Calculators: From Calculators.org.
Health Calculators: From Cedars-Sinai Hospital.
Home Energy Saver (HES): "HES computes a home's energy use on-line in a matter of seconds based on models and data developed at the U.S. Department of Energy's Lawrence Berkeley National Laboratory. All end uses (heating, cooling, water heating, major appliances, small appliances, and lighting) are included. HES generates a list of energy-saving upgrade recommendations for the user's consideration. HES is not a 'black box' - we extensively document all methodologies and assumptions." From the U.S. Department of Energy.
Library Value Calculator: From the American Library Association (ALA).
Life Expectancy Calculators: Includes Medical Calculators, Statistical Calculators, Fun Calculators, UCSF Geriatric Prognosis, and Life Expectancy Tables. Includes words of caution about using these calculators.
Living Wage Calculator: "Estimate the cost of living in your community or region. The calculator lists typical expenses, the living wage and typical wages for the selected location." From Pennsylvania State University.
NOAA Solar Calculator: "Find sunrise, sunset, solar noon and solar position for any place on earth."
Online Calculators: Math and Electrical Calculators.
Postage Price Calculator: Domestic and International Retail Prices. From the United States Postal Service.
Roman Numeral Converter
Student Loan Calculator: From FinAid! The Smart Student Guide to Financail Aid.
Time Capsule: Enter a date between 1800 and 2002. Creates a page with the headline, top songs, prices, TV shows, toys, books and movies in that week.
Weather Calculators: Topics include: Fahrenheit to Celsius, Wind Speed, Relative Humidity, Wind Chill, Heat Index. From The Washington Post.
What's My Carbon Footprint?: From the Nature Conservancy.
What Will It Take to Pay Off My Credit Card?: From Bankrate.com.
Wolfram|Alpha: Performs "dynamic computations based on a vast collection of built-in data, algorithms, and methods."

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