Math
Precision mathematical tools covering standard deviation, matrix determinants, geometry volume, and polynomial factoring.
Fraction Calculator
a/b + c/d = (a×d + c×b) / (b×d) a/b − c/d = (a×d − c×b) / (b×d) a/b × c/d = (a×c) / (b×d) a/b ÷ c/d = (a×d) / (b×c) Then divide top and bottom by their greatest common divisor.
Add, subtract, multiply or divide fractions and mixed numbers. Answers are simplified automatically and shown as a mixed number and a decimal.
Mean, Median & Mode Calculator
Mean = Σx ÷ n Median = middle value of the sorted list (average of the two middle values when n is even) Population variance σ² = Σ(x − mean)² ÷ n Sample variance s² = Σ(x − mean)² ÷ (n − 1) Standard deviation = √variance
Paste any list of numbers to find the average (mean), median, mode, range, variance and standard deviation in one step.
Percentage Calculator
P% of X = (P ÷ 100) × X A as a percent of B = (A ÷ B) × 100 Percentage change = (New − Old) ÷ |Old| × 100 X increased by P% = X × (1 + P ÷ 100)
Four percentage calculators in one: percent of a number, what percent A is of B, percentage change, and increasing or decreasing a number by a percentage.