Helpful Calculators

Is math not your strong subject? The following calculators will check if your child’s answers to his homework are correct. Of course he still need to work hard to find the solution but knowing the right answer will help him not to submit an assignment with the wrong answer.

If he wants to determine the area of a square, triangle, rectangle, circle or sphere, he can use the Area Calculator.

If he can't remember the formulas for the other two parts of a circle (area, diameter, or circumference) when he only know one, he can use the Circle Solver. He just needs to enter the circle area, diameter, or circumference and it will solve for the other two.

The Circumference Calculator can help him figure the circumference of a circle when he enter the radius.

The LCM and GCD will help him calculate the Least Common Multiple and Greatest Common Divisor of two numbers using this short script. 

The Prime Number Calculator can instantly tell him if it is a prime number or not as soon as he enters a number.

If your child enter two dates (including the time), the Date Difference  will display the number of weeks, days, hours, minutes, and seconds between the two. The seconds field is optional, too. For an example, try entering your birthdate and compare it to today's date.

The Day of Week calculates what day of the week a given date was. It works for leap years and also tells you whether the date is in the past future or today. 

If your kid enter a math expression (with +, -, *, and / signs) Expression Solver will evaluate the expression for him. 

If he enter a parabolic equation, like 5x^2 + 18x + 27 the Parabola Grapher will determine all the vital information about the graph. Aside from that a rough graph of the curve is available. 

If he enter the X-Y coordinates for a function, the Graphing Function will give him the graphing formulas, including Formula, Slope, Y-intercept, Parallel and Perpendicular lines. 

Your kid can solve any of three variables in a Kinetic Energy equation using the  Kinetic Energy calculator. All he need to do is enter two of the three values and submit to find the value of the third variable.

The Money Counter will calculate the total amount of money he has when he enter the number of bills and coins he has. All blank entries are ignored. Input field validation is also included -- try entering a non-digit into a field. Also, this script is a good demonstration of a JavaScript return function in use.

The Savings Estimator will display the total savings once your child enters how much one can afford to save each month, how long he can save this amount, and the interest rate he can get on his savings.

 The Compound Interest calculator will help him to calculate compound interest.

The Percent Calculator will solve percent problems when he enters the values.

The GPA Calculator is a very useful in figuring out your kids class GPA. He just need to enter the letter grade for each class.

The Square Root Calculator will find the value of a number squared or that number's square root. 

If he wants a very organized Periodic Table, and lots of information about any periodic element he click on,  the Periodic Table is worth checking over.

One of geometry's most useful formulas, the Pythagorean Theorem, can be applied to the numbers your child enters in JavaScript! Just enter 'A' and 'B' and the Pythagorean Theorem script solves for 'C.'

If your child enter the coefficients for the quadratic 'Ax^2 + Bx + C = 0' equation and the Quadratic Equation  calculator will output the solutions (if they are not imaginary).

The Quadratic Solver solves quadratic equations for inputted coefficients. Answers can be either real or complex. 

Your child can generate normally distributed random numbers by entering a mean value and standard deviation in the Random Distribution calculator. It uses the normal law of error to determine an events given probability. 

 Round has a simple function to round a decimal number to any number of decimal places  just by passing it different values. 

The Running Calculator allows your child to calculate a runner’s time, distance covered, or pace by entering the other two values. Distance and pace can be converted between various measurements.

The Scientific Calculator does many advanced functions - cosine, sine, tangent, square root, exponents, etc. 

The Sine Calculator will solve the sine angle once opposite and hypotenuse angle values are entered.

The Cosine Calculator will solve the cosine angle for him as long as he enter the adjacent and hypotenuse angle values

The Tangent Calculator will solve the tangent angle once the opposite and adjacent angle values
are entered.

If a coordinate pair for each the starting and ending points according to the Cartesian coordinate system is entered, the Straight Distance calculator will calculate the straight line distance between the two points.

The Distance Speed Time calculates the time, distance, or speed given any two of the pieces of information. 

The Driving Distance Calculator will help your child estimate the driving distance between U.S. cities.

The Miles per Gallon calculator computes the miles per gallon of a car via the miles traveled and the number of gallons used. Also, if your child enter the cost per gallon and how many miles the driver drive a day, it will estimate the monthly and yearly gas expenses.

If he enters a vehicle's quarter mile time (assuming he knows it) and vehicle weight the Horsepower Calculator will display the car's estimated horsepower.

The Top Speed by RPM will determine the top speed without any weight on the Tires when  the diameter of the tire and the RPM value of the motor is entered. 

If you are concern about your kids weight and health you might be interested in the following:

The Body Mass Index classifies a person into one of several categories, from underweight to desirable to obese. 

When someone’s height and weight is entered, the Body Mass Index can use a formula created by the Panel on Energy, Obesity, and Body Weight Standards to figure out the Body Mass Index.

The Body Calculator analyzes a person’s information (sex, height, weight) and responds with a comment message.

The Male Body Calculator calculates a man's ideal body measurements based on his wrist circumference.