Math Calculators

Work out X% of a number, what percentage one number is of another, the percentage change, or the price after a discount.

Free scientific calculator with trigonometric functions, logarithms and powers.

Add, subtract, multiply and divide fractions; the result is simplified automatically.

Solve ratios and proportions (a:b = c:d) — find the unknown value from the three known ones.

Calculate the mean, median, mode, range and standard deviation of a list of numbers.

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

Generate random numbers in a range — with draws without repeats and quick dice.

Check whether a number is prime and find its factors.

Find all divisors of a whole number, its factor pairs, their sum, and whether the number is prime or perfect.

The greatest common divisor and the least common multiple.

Round a number to decimal places or to the nearest ten/hundred/thousand.

Solve the sides and angles of a triangle.

Calculate the hypotenuse or a leg of a right triangle (a² + b² = c²).

Calculate the area of a rectangle, triangle, circle, trapezoid and parallelogram.

Calculate the volume of a cube, cuboid, sphere, cylinder and cone.

From the radius, diameter, circumference or area, find all the other values of the circle.

Calculate the basic probability of events.

Calculate nPr and nCr.

Solve ax² + bx + c = 0.

Calculate the percent error between the measured value and the true value.

Convert between binary, octal, decimal and hexadecimal.

Calculate the slope between two points and the equation of the line.

Calculate the distance between two points in the plane from their coordinates.

Calculate the square root, cube root or n-th root. For negative numbers, use an odd index.

Calculate the natural logarithm or a logarithm to a chosen base (log, ln).

Calculate radioactive decay or any process with a half-life.

Calculate the z-score (standard score) for a value in a distribution.

Calculate the confidence interval for a mean or proportion.

How many participants are needed for a survey with a given margin of error.

Convert numbers between decimal form and scientific notation (e.g. 1.5×10⁶).

Add, multiply and find the determinant of matrices.

Find the next term or the formula of an arithmetic and geometric sequence.

Calculate the power of a number: aⁿ, including negative and fractional exponents.

Calculate the total surface area of solids: sphere, cylinder, cone, pyramid and so on.

Perform operations with very large numbers that exceed the limits of a normal calculator.

Perform long division step by step with an explanation of each operation.

A simple calculator for the basic operations: addition, subtraction, multiplication, division.

Calculate the p-value from the test statistic (Z, t, chi², F) for one-tailed and two-tailed tests.