Math & School Calculators
Quick, accurate tools for homework, grades and everyday math, from percentages to standard deviation.
Online CalculatorA free online calculator for quick sums, with a glowing green display and chunky keys…Scientific CalculatorFree online scientific calculator with trig functions, logarithms, powers, roots,…Grade CalculatorCalculate your overall class grade from assignment scores and weights. Add as many…Weighted Grade CalculatorFind your weighted average grade from scores and category weights. Free online weighted…Percentage CalculatorCalculate percentages in seconds: percent of a number, what percent one number is of…Final Grade CalculatorFind the score you need on your final exam to reach the course grade you want. Instant…Ratio CalculatorSimplify a ratio to lowest terms or solve for a missing value in a proportion such as…Area CalculatorCalculate the area and perimeter of a rectangle, triangle, circle, trapezoid,…Volume CalculatorCalculate the volume and surface area of a box, cylinder, sphere, cone or pyramid.…Fraction CalculatorAdd, subtract, multiply and divide fractions and mixed numbers. Get the simplified…GPA CalculatorCalculate your semester and cumulative GPA on a 4.0 scale. Supports honors and AP…LCM CalculatorFind the least common multiple (LCM) and greatest common factor (GCF) of two or more…Square Footage CalculatorAdd up the square footage of rooms or areas. Enter length and width for each space and…GCF CalculatorFind the greatest common factor (GCF or GCD) of two or more numbers. Also shows the LCM…Standard Deviation CalculatorCalculate sample and population standard deviation and variance for any data set, with…Percent Change CalculatorCalculate the percentage change between two numbers. Shows percent increase or decrease…Average CalculatorFind the mean, median, mode, range and standard deviation of any list of numbers. Free…Statistics CalculatorFree statistics calculator: mean, median, mode, range, variance and standard deviation…Percentage Increase CalculatorIncrease a number by a percentage, such as a markup, raise or price rise. See the new…High School GPA CalculatorCalculate your high school GPA with weighted honors and AP classes. See unweighted and…Grade Average CalculatorCalculate the average of your grades. Enter each score; all rows are weighted equally by…College GPA CalculatorCalculate your semester and cumulative college GPA from course credits and grades.