Math calculators
Percentages, fractions, statistics, geometry and algebra tools with step-ready formulas and worked examples.
Percentage Calculator
Find X% of a number, or work out what percent one number is of another.
Percentage Change Calculator
Percentage increase or decrease between an old value and a new value.
Fraction Calculator
Simplify a fraction and see it as a mixed number, decimal and percentage.
Average Calculator
Mean of a list of numbers, with the sum and count shown.
Mean, Median & Mode Calculator
Mean, median, mode and range of a list of numbers in one go.
Standard Deviation Calculator
Population and sample standard deviation, variance and mean of a data set.
Ratio Calculator
Simplify a ratio to lowest terms and scale it up or down.
Proportion Calculator
Solve a/b = c/x for whichever value is missing.
Exponent Calculator
Calculate base raised to any power, plus its square and cube.
Logarithm Calculator
Logarithm of a number in base 10, e, 2 or any custom base.
Square Root Calculator
Square root, cube root and any nth root of a number.
Factorial Calculator
n! — the product of all whole numbers from 1 to n, exactly.
GCD & LCM Calculator
Greatest common divisor and least common multiple of two integers.
Pythagorean Theorem Calculator
Find the hypotenuse or a missing leg of a right triangle.
Quadratic Equation Calculator
Roots and discriminant of ax² + bx + c = 0, including complex roots.
Slope Calculator
Slope, distance, midpoint and angle between two points.
Area Calculator
Area of a square, rectangle, circle, triangle, trapezoid, parallelogram or ellipse.
Perimeter Calculator
Perimeter of squares, rectangles, triangles and regular polygons, plus circumference.
Volume Calculator
Volume of a cube, cuboid, sphere, cylinder, cone or pyramid.
Circle Calculator
Diameter, circumference and area from a circle's radius.
Triangle Calculator
Triangle area from base and height, or area and perimeter from three sides (Heron).
Random Number Range Analyzer
Honest range analysis: how many integers a range holds and the chance of any one of them.
Scientific Notation Calculator
Convert a decimal number into scientific notation: coefficient × 10^exponent.
Rounding Calculator
Round a number to decimal places or to significant figures.