Math calculators

Clear, practical math without the busywork. Every tool is free, fast and private.

现已提供

选择计算器

5 tools available now.

一步解决最常见的百分比问题。

即时换算常用的长度、重量、体积和温度单位。

Plot up to three functions, inspect their domain and estimate visible roots without sending formulas to a server.

Solve linear and quadratic equations, including repeated, complex, identity and no-solution cases.

Create and share a private calculator from a formula using variables a, b and c.

使用这些工具

Each math tool shows the relationship behind the result so it can be checked and reused.

Values are calculated locally with JavaScript and formatted only after the underlying calculation is complete.