Useful tools, clear explanations.

What this site does

Use the scientific calculator for expressions, the percentage and discount tools for simple proportions, or the converters for physical units and number bases. Each tool explains its inputs, method, examples and limits.

How calculations work

The calculation engine is written in Rust and runs as WebAssembly in your browser. Decimal operations use 64-bit floating-point arithmetic; integer base conversion uses exact signed 64-bit integers. The displayed decimal result is rounded to 12 significant digits.

Scope and accuracy

Tools are intended for everyday informational use. Check important results against the stated formula and an independent source. The tools do not supply live market data, professional advice or certified measurements.

Privacy

The application does not send entered numbers to a calculation service. Hosting still involves ordinary web requests. Read the privacy disclosure for details.

Questions or corrections?

Visit the Contact page to send a question, suggest a tool or report a calculation issue.