Math
Fractions, proportions, geometry, averages and probability: school and everyday math solved step by step, with the method explained.
- Math Average calculator Enter up to eight numbers to get their mean, median, sum, minimum, maximum and range at once.
- Math Circle calculator Start from the radius, diameter, circumference or area and get every other measure of the circle, plus the arc and sector for any angle.
- Math Fraction calculator Combine two fractions and get the simplified result, the mixed number, the decimal and the percentage.
- Math Percent change calculator Calculate the percent change between two values, the multiplier, the change needed to go back, the average change per period and the result of successive changes.
- Math Probability and combinations calculator Count the ways to choose k items among n, find your odds of winning a lottery draw, and the chance an event happens at least once in several tries.
- Math Proportion calculator (rule of three) Find the missing value of a proportion in one step, for quantities that grow together or that work against each other.
- Math Pythagorean theorem calculator Find the hypotenuse or a missing leg of a right triangle with a² + b² = c², along with its angles, area and perimeter.
- Math Quadratic formula calculator Get the discriminant, the real or complex roots, the vertex of the parabola and the sum and product of the roots.
- Math Standard deviation calculator Measure how spread out a set of numbers is: mean, variance and standard deviation for a population or a sample, coefficient of variation and standard error.
- Math Triangle calculator Enter the three sides of any triangle to get its area with Heron's formula, its three angles, its heights and its type.
- Math Volume calculator Calculate the volume and surface area of common solids, and convert the capacity to gallons, liters or cubic feet.
- Math Weighted average calculator Combine grades with their weights into a weighted average, compare it with the simple average and find the score you need on the next test.