Math & Statistics Calculators

Scientific Calculator

Trig, logarithms, powers, roots, and standard arithmetic.

Fraction Calculator

Add, subtract, multiply, and divide; results reduced.

Percentage Calculator

Percent of value, percent change, and reverse percentage.

Random Number Generator

Generate random integers in a range with optional uniqueness.

Standard Deviation Calculator

Sample or population spread from a list of values.

Number Sequence Calculator

Arithmetic or geometric nth term and partial sum.

Exponent Calculator

Calculate powers: raise a base number to an exponent.

Half-Life Calculator

Compute half-life decay values from initial amount, remaining amount, time, or half-life.

Log Calculator

Calculate logarithms for common or custom bases with inverse exponent checking.

Quadratic Formula Calculator

Solve quadratic equations using the quadratic formula and discriminant.

Binary Calculator

Binary arithmetic and conversion between binary and decimal.

Hex Calculator

Hexadecimal arithmetic and conversion between hex and decimal.

Sample Size Calculator

Minimum sample size required for a proportion or mean with target confidence level and margin of error.

Statistics Calculator

Mean, median, mode, and range from a list of numbers.

Permutation and Combination Calculator

Calculate nPr and nCr for permutations and combinations.

Z-score Calculator

Compute the standard score to compare values to the population mean.

Probability Calculator

Probability union, intersection, neither, and exclusive outcomes for two independent events.

Percent Error Calculator

Percent error, percent difference, and measurement accuracy for observed and expected values.

GCD and LCM Calculator

Greatest common divisor and least common multiple of two or more numbers.

Factorial Calculator

Exact factorial (n!) of a whole number with full-precision large results.

Prime Number Checker

Check whether a number is prime and see its full prime factorization.

Slope Calculator

Slope, line equation, distance, and angle of incline between two points.

Distance Calculator

Euclidean distance between two points in 2D or 3D space.

Right Triangle Calculator

Solve a right triangle for the missing side or angle using the Pythagorean theorem.

Circle Calculator

Radius, diameter, circumference, and area of a circle from any one known value.

Ratio Calculator

Simplify a ratio to lowest terms or solve a proportion for a missing value.

Root Calculator

Calculate the nth root of a number, including square and cube roots.

Confidence Interval Calculator

Confidence interval for a sample mean or proportion using the z-score method.

Matrix Calculator

Add, subtract, and multiply matrices, or find the transpose and determinant.