Science Tools
5 free science tools. Browser-based. No signup. Privacy-first.
什么是 Science Tools？
Science tools are browser-based calculators for chemistry and physics — molar mass, the periodic table, kinematics, significant figures and scientific-notation conversion. They run client-side, free and instantly, so students and researchers can compute without installing anything.
What are science tools?
These calculators handle the recurring computations of school and lab science: working out a molar mass, looking up an element, solving a kinematics problem, or rounding to the correct number of significant figures. Each gives an instant, shareable result.
They run entirely in your browser — free, private and offline-capable once loaded.
Why client-side?
- Privacy: sensitive data (API keys, payloads, passwords) never leaves your device.
- Speed: no network round-trip — results appear as you type.
- Reliability: works offline once loaded.
- Cost: always free, no signup or rate limits.
Browse Science Tools
Chemistry · 2
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常见问题
什么是科学计数法？
一种将数字表示为 1 到 10 之间的尾数（mantissa）乘以 10 的幂次的方法，例如 4.5 × 10⁻⁴ 对应 0.00045。
什么是工程计数法（engineering notation）？
与科学计数法类似，但指数始终是 3 的倍数，这样正好对应 SI 词头（千、毫、微……）。
什么是 E-notation？
计算机/计算器上使用的科学计数法表示形式，例如 4.5e-4 表示 4.5 × 10⁻⁴。
可以反过来转换回普通十进制形式吗？
可以——输入科学计数法或 E-notation 形式的数值，标准十进制形式的结果就会显示出来。
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