Math Calculators
23 free tools — pick one to get started.
Percentage Calculator
Solve the three core percentage problems: what is X% of Y, X is what % of Y, and percentage increase/decrease.
Fraction Calculator
Add, subtract, multiply, or divide two fractions and get a simplified result.
Ratio Calculator
Simplify a ratio and solve missing terms in proportional ratios.
Average Calculator
Compute the arithmetic mean of a list of numbers.
Median Calculator
Find the middle value of a list of numbers.
Mode Calculator
Find the most frequently occurring value(s) in a dataset.
Standard Deviation Calculator
Calculate population and sample standard deviation and variance.
Variance Calculator
Calculate the variance of a dataset.
Probability Calculator
Calculate single-event probability and the complement.
Permutation Calculator
Calculate the number of ordered arrangements (permutations) of r items from n.
Combination Calculator
Calculate the number of unordered selections (combinations) of r items from n.
LCM Calculator
Find the least common multiple of two or more integers.
GCD Calculator
Find the greatest common divisor of two or more integers.
Quadratic Equation Solver
Solve ax² + bx + c = 0 for both real and complex roots.
Linear Equation Solver
Solve ax + b = 0 for x.
Pythagoras' Theorem Calculator
Solve a² + b² = c² for any side of a right triangle.
Distance Formula Calculator (2D)
Calculate the straight-line distance between two points in a 2D plane.
Distance Formula Calculator (3D)
Calculate the straight-line distance between two points in 3D space.
Midpoint Calculator
Find the midpoint of the line segment between two 2D points.
Slope Calculator
Calculate the slope, y-intercept, and equation of the line through two points.
Trigonometry Calculator
Compute sin/cos/tan/sec/csc/cot of an angle, or arcsin/arccos/arctan of a value.
Logarithm Calculator
Compute logarithms in any base — natural log (ln), common log (log₁₀), or a custom base.
Exponential Calculator
Compute b^x (b raised to the power x) for any base and exponent, including e^x.