🧮 Math

A simple calculator for everyday arithmetic — addition, subtraction, multiplication, and division.

A scientific calculator with trigonometric, logarithmic, and exponential functions.

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

Add, subtract, multiply, or divide two fractions and get a simplified result.

Find the mean, median, mode, and range of a list of numbers.

Solve ax² + bx + c = 0 for real or complex roots, with the discriminant shown.

Generate a random integer between a minimum and maximum value.

Find the greatest common divisor and least common multiple of two numbers.

Simplify a ratio (A:B) to its lowest terms and see the decimal equivalent.

Calculate the standard deviation and variance of a list of numbers.

Convert between regular numbers and Roman numerals in both directions.

Find the square root of any number, and check if it's a perfect square.

Calculate a base number raised to any power, including negative and fractional exponents.

Calculate the logarithm of a number in base 10, base e (natural log), base 2, or any custom base.

Find the slope, y-intercept, and angle of the line through two points.

Calculate a circle's circumference, area, and diameter from its radius.

Calculate the number of combinations (nCr) and permutations (nPr) for choosing r items from n.

Calculate a confidence interval for a sample mean at 80–99% confidence levels.