Math Calculators

Calculate your weighted grade and letter grade from assignment scores and weights, or find the score you need on your final exam.

Find the sale price and savings from a percent or amount off, the real percent off between two prices, stacked discounts and sales tax.

Find Q1, Q3, the IQR and the upper and lower fences for a data set and spot outliers.

Find the area and perimeter of a rectangle, square, triangle, circle, trapezoid, parallelogram or ellipse, with m², ft², acre and hectare conversions.

Find a percent of a number, what percent one number is of another, percentage change, and increases or decreases by a percent, with steps.

Find the square root, cube root and simplified radical form of any number, with a perfect-square check and worked steps.

Find the volume and surface area of a box, cube, cylinder, sphere, hemisphere, cone or pyramid, with results in liters and gallons.

Enter a list of numbers to get the mean, median, mode, range and standard deviation, with an optional weighted average.

Find the least common multiple of two or more whole numbers and see the prime factors and steps behind the answer.

Find the greatest common divisor (also called HCF or GCF) of two or more whole numbers, with Euclidean algorithm steps.