Calculator Directory

Selling ad banners has just got easier! Just enter two of the three fields of information, such as the total cost, CPM (cost per thousand impressions), and exposures (number of ads shown), and the calculator will solve the last field for you.

Project what your current college savings plan may cover and estimate any funding gap.

Calculate the monthly or annual contribution needed to meet a college savings goal.

Compare two fixed-rate loan scenarios, including monthly payments, total interest, total cost, closing costs, and a simple closing-cost recovery estimate.

Enter how much you want to spend each month, an interest rate, and a loan amount and the calculator tells you how long it will take you to pay it off!

This calculator allows you to calculate the total amount of money you have, just enter the number of bills and coins.

Estimate student-loan payments, total interest, payoff timing, or an affordable loan amount.

Use this compact scientific calculator for arithmetic, trigonometry, logarithms, powers, roots, fractions, and other scientific calculations.

Enter the adjacent and hypotenuse angle values and this calculator will solve the cosine angle for you.

Just enter a math expression and this calculator will evaluate the expression for you.

The Length Adding calculator allows you to add feet and inches.

Use this fractions calculator for fraction and decimal arithmetic with a running calculation tape.

Graph explicit functions of x with a simple responsive graphing calculator.

The percentage calculator allows you to find out what the amount, the percentage, the percent amount, the percent increase or the percent decrease is, if you know any of the two.

Online Perches to Square Meters and Square Feet Calculator.

Enter a number and this calculator will instantly tell you if it is a prime number or not.

Enter any two sides of a right triangle and leave the unknown side blank. The calculator solves for side A, side B, or hypotenuse C, or verifies whether all three sides form a right triangle.

A calculator to figure the square root of the number you enter. Just enter the coefficients for the Ax^2 + Bx + C = 0 equation and the calculator will output the solutions (if they are not imaginary!). Neat!

Use this advanced scientific calculator for arithmetic, trigonometry, statistics, matrices, constants, and complex mathematical expressions.

Enter the opposite and hypotenuse angle values and this calculator will solve the sine angle for you. Neat!

Use this standard tape calculator for everyday arithmetic with a running calculation tape.

This calculator allows you to create a special table where each data value is split into a stem (the first digit or digits) and a leaf (usually the last digit).

This calculator will solve the tangent angle for you, just enter the opposite and adjacent angle values and press Calculate.

Use this calculator to find out how many days are left until Christmas.

Calculate the exact number of calendar days between two dates. Enter a start date and an end date, and the result updates automatically.

Convert between degrees, radians, turns, arcminutes, arcseconds, gradians, angular mils, and other angle units.

Convert between metric, imperial, land, and scientific area units.

Convert colors between Hex, RGB, HSL, and HSV, and view complementary and inverted colors.

Currency calculator allows you to convert between currencies. Exchange between dollars, pounds, euro, yen, yuan, and many more.

This calculator allows you to calculate data size in bits, nibbles, bytes, kilobytes, megabytes, gigabytes, and terabytes.

Convert between kilograms per cubic meter, grams per cubic centimeter, grams per milliliter, pounds per cubic foot, and other density units.

Convert between joules, calories, kilocalories, watt-hours, kilowatt-hours, BTU, electronvolts, and other energy units.

Convert between liters per minute, gallons per minute, cubic feet per minute, cubic meters per second, and other flow-rate units.

Convert between newtons, kilonewtons, pound-force, kilogram-force, dynes, kip, and other force units.

Convert between hertz, kilohertz, megahertz, gigahertz, terahertz, cycles per second, and rpm.

Convert between miles per gallon, kilometers per liter, liters per 100 kilometers, and other fuel economy units.

Convert between metric, imperial, nautical, astronomical, typographic, and other length units.

Convert between watts, kilowatts, megawatts, horsepower variants, BTU per hour, foot-pounds per second, and other power units.

Convert between pascals, bars, atmospheres, psi, torr, mercury column, water column, and other pressure units.

Convert between meters per second, kilometers per hour, miles per hour, knots, Mach, and other speed units.

The temperature calculator allows you to convert temperature degrees between Celsius, Fahrenheit, Kelvin, Rankine, Delisle, Newton, Réaumur and Rømer. Enter a value in any field to see the other values.

Convert between seconds, minutes, hours, days, weeks, months, years, and other duration units.

Convert between newton-meters, pound-feet, pound-inches, ounce-inches, and kilogram-force torque units.

Convert length, area, volume, speed, pressure, energy, power, time, and weight or mass units using curated unit choices.

Convert between metric, cubic, US liquid, Imperial, dry, and other volume units.

Convert between grams, kilograms, pounds, ounces, stones, tons, and metric tons.

This calculator allows you to calculate blood alcohol content (BAC) based on the quantity of beverages consumed, the alcohol percentage in each drink, the weight of the person, and the time spent consuming the drink.

This calculator allows you to calculate your Body Mass Index (BMI). Body Mass Index (BMI) is a person's weight in kilograms divided by the square of height in meters. Find out your BMI and what it means for your health.

This calculator allows you to figure out how many calories you have burned.

This calculator allows you to calculate your due date, conception date, and fetal age.

We stay home! To understand why, adjust the 'Social distancing factor' slider to see the effect and impact of social distancing.

This calculator allows you to calculate a bass fishing boat's speed.

This calculator allows you to find out your vehicle's horsepower.

This calculator allows you to compute the miles per gallon of your car via the miles travelled and the number of gallons used. Also, if you enter the cost per gallon and how many miles you drive a day, it will estimate your monthly and yearly gas expenses.

This calculator allows you to calculate miles per hour.

This calculator allows you to figure armor penetration.

Calculate goalkeeper saves, save percentage, scoring percentage, shot ratios, and win percentages for soccer teams.

This calculator allows you to estimate how long it will take to download a file at any of a number of modem speeds. Try it out!

Calculate standard-atmosphere properties from altitude, speed, and reference length.

Estimate the outdoor temperature from cricket chirps counted during 25 seconds.

Find out your Western Sun Sign, and your Eastern or Chinese Sign.

Are you in love and want to know if it could be a good match? Calculate your chances of a successful relationship based on your first names with the free Love calculator!

To find out what the chances for you and your dream partner are, just fill in your and his or her Info and click Calculate.

Have you ever wondered if your phone number has a memorable text equivalent, like 555-HELP? Just type it in and this calculator will generate all possible combinations, just pick your favourite one and tell the world how to reach you.

This useful calculator will tell you the degrees, Nautical Miles, Statute Miles, and Kilometers between your originating and destination airports. It has a built-in database of over 150 of the most travelled airports!

Calculate the exam score needed for a target grade or project a final course grade.

Project a final course grade from the current grade, final exam weight, and expected exam score.

Calculate semester and cumulative GPA from letter or numeric grades and course credits.

Calculate an overall course grade using points or weighted categories.

Ever had to work with another person to complete a task? This calculator will tell you how long it would take two people to complete the task if you know how long it would take each person to complete the task individually.

Calculate the score needed on a final exam to reach a desired course grade.

This calculator allows you to find the approximate room size you will need depending on your room setup and arrangement.

Calculate a test percentage, fraction, and letter grade from correct or incorrect answers.

Wind Chill is a mysterious and often misunderstood phenomenon. This calculator describes what the wind chill factor really is and offers a form to calculate the wind chill factor when given the air temperature and wind speed.