🧮 Mathematik

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

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

Berechnen Sie einen Prozentsatz einer Zahl, wie viel Prozent eine Zahl von einer anderen ist, oder die prozentuale Veränderung.

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.