Math calculators

Find a percentage of a number, what percent one number is of another, or percent change.

Percent increase or decrease between two values.

Simplify fractions and show decimal equivalent.

Simplify and compare ratios.

Central tendency from a list of numbers.

Least common multiple of two numbers.

Greatest common divisor of two numbers.

Real or complex roots of ax² + bx + c = 0.

Raise a base to any power.

Square root of a non-negative number.

Population standard deviation and variance.

Round a number to chosen decimal places.

Break an integer into its prime factors.

Count ordered permutations and unordered combinations.

Logarithm in any base plus ln and log₁₀.

Determinant of a 2×2 or 3×3 matrix.

Convert between binary strings and decimal integers.

Convert between decimal and mantissa × 10ⁿ form.