Maths & education

Converters, calculators, PDFs, images and everyday utilities. Choose a tool, check its processing notice, and get started without an account.

Evaluate arithmetic, powers and trigonometric functions in radians without eval.

Add, subtract, multiply or divide rational numbers exactly.

Solve real linear and quadratic equations ax² + bx + c = 0.

Calculate a credit-weighted average from grade points you provide.

Calculate the final-exam score needed for a target course grade.

Calculate mean, sample and population variance and standard deviation.

Generate bounded random integers with optional uniqueness.

Your tools. Your choice.