Calculator

About

Calculator is a clean, fast calculator that lives in your browser toolbar. Run everyday arithmetic or switch to Scientific Mode for trigonometry, logarithms, and roots — no app to install.

Key features:
- Scientific Mode: sin, cos, tan, log, ln, sqrt, x², and π
- Unit Converter for length, weight, and temperature, with localized unit names
- Calculation history so you can review and reuse previous results
- Built-in Scratchpad for jotting notes or rough calculations
- Keyboard input support
- Available in 11 UI languages
- Clean light theme

Everything runs locally and works fully offline. No account is needed and your calculations never leave your device.
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Calculator 是一款简洁快速的浏览器工具栏计算器。既可进行日常四则运算，也可切换到科学模式完成三角函数、对数和开方运算 — 无需安装额外应用。

主要功能：
- 科学模式：sin、cos、tan、log、ln、sqrt、x²、π
- 单位换算：长度、重量、温度，并提供本地化的单位名称
- 计算历史：随时查看并复用此前的结果
- 内置草稿纸：记录笔记或临时计算
- 支持键盘输入
- 提供 11 种界面语言
- 简洁浅色主题

所有运算均在本地完成，可完全离线使用。无需注册账号，计算内容绝不离开你的设备。