Mathematics
Percentages, equations, geometry, statistics and more.
Binomial probability calculator
The probability of exactly k successes in n independent trials, each with the same success probability.
Circle calculator
Diameter, circumference and area of a circle from its radius.
Combinations and permutations calculator
How many ways to arrange or choose r items from n, with and without order mattering.
Conditional probability calculator
P(A given B) and P(B given A) from P(A), P(B) and P(A and B), with an independence check.
Coordinate geometry calculator
Distance, midpoint and slope between two points on a coordinate plane.
Definite integral calculator
The area under a curve between two x-values, both exactly and by Simpson's numerical rule.
Derivative calculator
The exact derivative f′(x) at a point, checked against a numerical estimate.
Expression grapher
Type any function of x and see it graphed, evaluated and typeset.
Fraction calculator
Add, subtract, multiply and divide two fractions, with simplified results.
Function evaluator and grapher
Evaluate a function at a point, see its domain and range, and view its graph.
Linear inequality solver
Solve ax + b compared to c (<, ≤, > or ≥) for x.
Inverse trigonometric functions calculator
Find the angle whose sine, cosine or tangent is a given value.
Limit calculator
Estimate lim(x→a) f(x) by approaching a from both sides.
Linear equation solver
Solve ax + b = c for x.
Normal distribution calculator
The z-score of a value and the share of a normal distribution below and above it.
Percentage calculator
Find a percentage of a number, and increase or decrease a number by a percentage.
2D shape area and perimeter calculator
Area and perimeter of a rectangle, triangle or trapezoid.
Ratio and proportion solver
Solve a ÷ b = c ÷ x for the missing value.
Pythagorean theorem calculator
Find a missing side of a right-angled triangle, plus its area and perimeter.
Quadratic equation solver
Solve ax² + bx + c = 0 and see the discriminant and the roots, including complex roots.
Simultaneous equations solver
Solve two linear equations with two unknowns, x and y, using Cramer's rule.
3D solid volume and surface area calculator
Volume and surface area of a sphere, cylinder or cone.
Statistics calculator
Mean, median, mode, range, variance, standard deviation and quartiles for up to 8 numbers.
Triangle solver
Find every side, angle, perimeter and area of a triangle from three sides, or two sides and the angle between them.
Sine, cosine and tangent calculator
sin, cos and tan of an angle in degrees, with the angle in radians.