Math tools

    Expression evaluation and quick calculators.

    Math evaluator

    Evaluate mathematical expressions with units, functions and constants.

    ETA calculator

    Estimate when a repetitive task will finish from its throughput so far.

    Percentage calculator

    Percentage of a number, what percent one number is of another, and change.

    Everything here runs on your machine

    These 3 math tools are plain client-side JavaScript served as static files. There is no backend to receive what you paste, no account to create and no usage limit. Open your browser's network panel while you work and you will see the page load, then nothing else.