工程计算机
三角函数、对数、开根号、次方与记忆功能，全部在浏览器内完成。
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How to use
- Click digit and operator buttons to build your expression. The full expression shows at the top of the display.
- Use function buttons (sin, cos, tan, log, ln, √) to wrap the next value in that function call.
- Press = to evaluate. Press C to clear and start over.
Related math tools
- Fraction Calculator — add, subtract, multiply and divide fractions
- Quadratic Equation Solver — solve ax² + bx + c = 0
- Standard Deviation Calculator — compute population and sample std dev
常见问题
- Is this scientific calculator free?
- Yes, completely free with no signup and no usage limits.
- Does my data leave my device?
- No. Every calculation happens locally in your browser. Nothing is sent to any server.
- Does it work on mobile?
- Yes. The calculator layout is mobile-optimised with large tap targets for iPhone and Android.
Last updated: By jarvisbox