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

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

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

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

Calculate an overall course grade using points or weighted categories.

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

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.

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

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

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

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

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.

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).

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

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

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

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

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.

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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!

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.

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!

This calculator allows you to figure armor penetration.

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

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 a bass fishing boat's speed.

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.

The purpose of this calculator is to provide calculations and details for bond valuation problems. It is assumed that all bonds pay interest semi-annually. Future versions of this calculator will allow for different interest frequency.

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

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

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

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.

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!

Use this home equity calculator to estimate how much equity you may have in your home after subtracting mortgage and loan balances. Enter your home’s current value and any outstanding balances to see estimated available equity at 80%, 100%, and 125% of home value.

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.

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.

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

This calculator allows you to calculate the amount you can afford to pay for a mortgage.

This calculator lets you calculate your estimated lease payments.

Easily calculate the payments and interest amount on a loan based on the principal amount, annual interest and the number of payments with the free Loan calculator.

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.

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 how long it will take until you reach your desired account balance.

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

The Mortgage Payment Calculator allows you to calculate monthly payments, average monthly interest, total interest, and total payment.

This calculator will try to calculate what kind of income lenders will expect you to be making to qualify for the specific values.

This calculator allows you to calculate miles per hour.

Online Perches to Square Meters and Square Feet Calculator.

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

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

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!

This calculator allows you to compare renting versus buying by entering how much you want to spend a month and how much down you would put into your house.

Find out how much to put away tax deferred to get a certain amount of money in the future, and how much you could expect to draw out of that money. Just put in some numbers to see!

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

Enter how much you can afford to save each month, how long you can save this amount, and the interest rate you can get on your savings and this calculator will display your total savings.

This calculator allows you to calculate monthly payment, average monthly interest, total interest, and total payment of your mortgage.

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

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

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

Deciding when to buy and sell stocks is difficult enough - figuring the profit or loss from that trade should not have to be. Just enter the number of shares, your purchase price, your selling price, and the commission fees for the trade and this calculator instantly figures your resulting profit or loss after commission fees.

How much do I keep in stocks and bonds?

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

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.

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.