By Christina Laun

While most of us can do math, even the complicated stuff, on our own, using a calculator is usually faster and eliminates a lot of potential errors. You don’t need a desktop model to calculate these days — the Internet is full of calculators that are free for you to use. Here are 100 places where you can go to calculate just about anything and everything.

Basic

Do your basic calculations on these calculators.

1. Scientific Calculator: This calculator contains all the basic functions of a scientific calculator without the need for a separate calculator.
2. MetaCalc: This calculator is about as basic as it gets, with simple addition, subtraction, division and multiplication functions.
3. Geometry Calculator: Figure out the circumference of a circle, volume of a cube, area of a triangle and much more using this geometry calculator.
4. Algebra Calculator: This calculator allows you to input an algebraic equation and figure it out for a particular variable.
5. Calculus Calculator: Find a derivative, an integral, and more using this helpful calculus focused calculator.
6. Virtual Calculator: Here you’ll find a simple scientific calculator for all your calculating needs.
7. Fractions Calculator: Make doing math with fractions super easy by inputing the numbers to this calculator.
8. Square Root Calculator: This calculator makes it easier to figure out square roots in a simple online format.
9. FooPlot Online Graphic Calculator: Don’t pay for expensive graphing calculators: just try out this easy-to-use online graphing calculator.
10. GCalc: This Java-based calculator allows users to graph a variety of functions.
11. 5 Function Calculator: They don’t make calculators any simpler than this, with only 5 functions to choose from.
12. Quadratic Solver: Solve a quadratic equation using this online calculator.
13. Sine Calculator: Make trig a breeze by trying out this sine calculator.
14. Parabola Calculator: Find all the figures you need to know about a parabola by inputting your information into this helpful calculator.

Finances

Crunch the numbers on your finances with these helpful calculators.

15. College Cost Projector: Figure out the projected cost of your college education using this calculator so you’ll know how much to set aside ahead of time.
16. Salary Calculator: Use this calculator to figure out how much you’re worth in various cities across the United States.
17. Inflation Calculator: This calculator can show you how much inflation has changed the value of money from 1800 to 2007.
18. Compound Interest Calculator: Here you’ll be able to easily calculate the compound interest of any size investment.
19. IRS Withholding Calculator: The IRS provides this calculator to help you make sure you’re not withholding too much or too little from your paycheck.
20. Social Security Quick Calculator: Estimate your Social Security benefits using this government sponsored calculator.
21. Cost of Living Calculator: Find out how far your money will go in another city using this calculator to determine the cost of living.
22. Credit Card Debt Calculator: Figure out how long it will take you to pay off your credit card debt using this calculator from Bankrate.com.
23. Savings Calculator: This calculator will help you figure out how much you’ll need to save to meet your goals.
24. Net Worth Calculator: Want to know how much you’re worth? Check out this online calculator for answers.
25. Roth IRA Calculator: Determine if you should switch your traditional IRA over to a Roth IRA using this calculator.
26. Variable Annuity Calculator: Find out how a variable annuity can benefit your long term goals with this calculator.
27. Tax Estimator Calculator: H&R Block provides this calculator which you can use to estimate how much your tax refund will be or if you’ll owe the IRS.
28. Basic Financial Calculator: This calculator from Dinkytown provides all the necessities you need to figure out basic financial calculations.
29. Student Budget Calculator: Most students are on a tight budget, so use this calculator to see what your monthly spending habits should be.
30. Money Counter Calculator: Input the amount of each increment of cash you have, and this calculator will tell you how much you have.

Health and Fitness

These calculators can help ensure you’re staying on track in fitness and health.

31. BMI Calculator: Your BMI can be more important than your weight, so ensure yours is within a healthy range using this calculator.
32. Pregnancy Date Calculator: Use this calculator to figure out when you can expect your bundle of joy based on your past cycles.
33. Life Expectancy Calculator: This calculator uses risk factors to give you an estimate of your life expectancy. Of course it shouldn’t be taken as fact.
34. Exercise Calorie Calculator: Figure out how many calories you’re burning doing your favorite exercises using the helpful tool.
35. Calories Per Day Calculator: Here you’ll find a calculator that can give you an estimate of how many calories you should be eating each day to lose or maintain weight.
36. Basal Metabolism Calculator: Establish your basal metabolism rate by doing a simple calculation here.
37. Target Heart Rate Calculator: Aim to get your heart rate up to the estimate this calculator gives you to get in shape.
38. Ideal Weight Calculator: While true ideal weight is up for debate, this calculator can give you a good estimate of where you should be.
39. Blood Alcohol Content Estimator: This estimation calculator can help you determine how many drinks it takes to get you drunk.
40. Ovulation Calculator: Those trying to get pregnant will appreciate this calculator which can help you determine your next date of ovulation.
41. Cost of Smoking Calculator: Determine how much smoking is really costing you using this calculator.
42. Waist to Hip Measurement Calculator: Studies have shown that waist to hip ratios can be a good indicator of overall fitness. Check yours here.
43. Lose One Pound Calculator: This calculator can give you an idea of how many calories you’ll need to burn or cut out of your diet in order to lose one pound.
44. Lap Time Calculator: Here you’ll find a calculator that can help you determine how long your laps need to be to meet a certain time.
45. Running Calculator: Runners can use this calculator to figure out their time, distance and a number of other fitness goals.

Conversions

Don’t bother remembering complicated conversion formulas, just use these calculators.

46. Currency Conversion Calculator: Whether you’re traveling or just curious about currency conversion, this calculator can take care of your needs.
47. Cooking Conversion Calculator: Make cooking dinner easy with this simple conversion calculator.
48. Metric Conversion Calculator: Don’t let metric conversions confuse you: just plug them into this online calculator.
49. Unit Conversion Calculator: This calculator lets you quickly convert measurements of length, time, pressure and more.
50. Speed Conversion Calculator: Figure out how fast you’re going in miles or kilometers using this conversion tool.
51. Bits/ Bytes Conversion Calculator: Make Internet-based conversions simpler using this calculator which converts bit into bytes and vice versa.
52. Wage and Salary Conversion Calculator: This calculator lets you easily figure out how much you make per hour or per year based on your pay.
53. Decibel Conversion Calculator: Convert decibels to power or voltage using this calculator.
54. Temperature Conversion Calculator: Whether you need to use Fahrenheit, Celsius or Kelvin, this calculator has you covered.
55. Weight Conversion Calculator: No matter what unit of weight you’re trying to use you can find an easy conversion using this calculator.
56. Decimal to Binary Converter Calculator: Nerds will enjoy this calculator which does the work of converting binary to decimals.

Loans and Mortgages

Financing a home or anything else is full of important calculations, and these tools can help you do the math.

57. Mortgage Payment Calculator: Figure out how much you can expect to pay per month based on the cost of your mortgage using this calculator.
58. Mortgage Calculators: These calculators can help you figure out how much you’ll pay each month, how much you can afford and what you’ll be allowed to borrow.
59. Rent vs Buy Calculator: This site can help you figure out if it’s best to rent or buy in the long run.
60. Refinancing Calculator: Calculate how much you could save by refinancing your mortgage using this calculator.
61. Auto Loan Calculator: Your new car may be snappy, but this calculator can let you know how much it will be costing you per month.
62. School Loan Calculator: See how much that student loan will cost you when you have to start paying it off using this handy tool.
63. Amortizing Loan Calculator: This tool will let you know how much you’ll be paying per month or figure out how much you can get for a desired monthly payment.
64. Loan Repayment Calculator: Check out how long it will take you to pay off your loan using this calculator.
65. Mortgage Points Calculator: Find out if you should buy mortgage points or not using this calculator from DinkyTown.
66. Mortgage 15 vs 30: Use this calculator to find out if a 15- or 30-year mortgage is better for your finances.
67. ARM vs Fixed Rate Mortgage: Which is best for you? This calculator can help you figure it out.
68. Mortgage Required Income: Find out how much your income can allow you to borrow using this calculator.

For Fun

These aren’t the most practical calculators, but they can entertain and make your life a little easier.

69. Love Calculator: Determine your compatibility with your love interest based on your names using this just-for-fun calculator.
70. Birthday Calculator: Put your birthday into this calculator and it will tell you what day of the week you were born.
71. Age Calculator: This calculator will tell you how old you are in days, weeks, months or even seconds.
72. Group Work Calculator: Use this calculator to solve word problems or to determine how much time you can save by working together.
73. Horsepower Calculator: Get an estimate of your car’s horsepower using this helpful tool.
74. Dog Years Calculator: Find out how old you (or your pet) is in dog years using this calculator.
75. Leap Year Calculator: This calculator makes it easy to figure out if any year is a leap year.
76. Room Size Calculator: Teachers or anyone else trying to plan out a large room can use this tool to figure out what size you’ll need to fit everything in.
77. Wind Chill Calculator: The thermometer may say one thing but it probably feels like another if there’s much wind outside. This calculator can help you figure out just what the wind chill is.

Everyday Life

Use these helpful online calculators to navigate the numbers in your everyday life.

78. Postage Price Calculator: Put in the weight of your package to determine how much it will cost you to send it using this Post Office tool.
79. Individual Emissions Calculator: Find out the level of your emissions using this calculator.
80. Chef’s Cooking Calculator: Keep things easy around the kitchen no matter what recipe you’re using with this calculator.
81. Carbon Footprint Calculator: Determine your impact on the environment based on this calculator, and figure out ways you can help reduce it.
82. Weather Calculator: Covert wind, pressure, moisture and more with this all purpose weather calculator.
83. Date Duration Calculator: Enter the start and end dates and get the amount of time in between with this helpful calculator.
84. Fuel Cost Calculator: This calculator can help you get an estimate of how much it will cost you to take that road trip.
85. Airport Calculator: Find out the distance between two airports so you’ll know just how far you’re traveling on your next trip by entering your airports in this calculator.
86. Best Price Calculator: Use this calculator to figure out whether it’s better to buy in bulk or just get one item.
87. Day of the Week Calculator: Enter any date into this calculator and find out what day of the week it was or will be.
88. GPA Calculator: Do the math with this calculator to figure out your GPA based on your grades.
89. MPG Calculator: Find out what MPG your car is getting using this calculator.
90. Phone Bill Calculator: Turn this calculator on the next time you make a long distance call to estimate how much it will cost you.
91. Tip Calculator: Figure out how much to tip using this helpful calculator.

Specialty

While these won’t be useful for everyone, certain specialties will find them very helpful.

92. Astro-Physical Calculator: Work with calculations involving the speed of light, mass of protons, parsecs and much more using this highly scientific calculator.
93. Depth of Field Calculator: Photographers can take advantage of this calculator to figure out the depth of field to adjust camera settings.
94. Atomic Mass Calculator: Enter the molecule you want to find the atomic mass for, and this calculator will do the rest.
95. Time, Speed and Distance Calculator: Make doing psychics calculations of time and distance no-brainers by using this calculator.
96. Armor Penetration Calculator: Those working in law enforcement or security can benefit from this calculator which determines the penetration of a gun based on the distance, gun type and angle.
97. Random Distribution Calculator: Use this calculator to come up with a random number.
98. Frequency Wavelength Calculator: Find out where something should be on a radio dial using this calculator.
99. Clinical Calculators: These calculators provide pregnancy estimations, Ballard scores, growth charts and more.
100. Home Improvement Calculators: Find out how much to buy of things like drywall, paint, grass seed and more using these helpful calculators.

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This entry was posted on Wednesday, July 16th, 2008 at 10:47 am and is filed under Uncategorized. You can follow any responses to this entry through the RSS 2.0 feed. You can leave a response, or trackback from your own site.