Category
Science Tools — Free Online Utilities
Science tools grounded in real formulas: converters, calculators, and simulators for chemistry, biology, and physics tasks.
7 工具
免费
无需注册
Chemical Formula Calculator
Parse chemical formulas and calculate molar mass and percent composition.
DNA Sequence Tools
Analyze DNA sequences: complement, GC content, transcription, and translation.
DNA/RNA翻译器
将DNA序列翻译为互补DNA、mRNA和蛋白质链，并提供逐密码子分解。
Earth & Space Calculator
Fun astronomy calculators: planetary weight, travel time, age on other planets, and more.
Physics Calculator
Solve common physics problems with step-by-step solutions.
Scientific Unit Converter
Convert between scientific units for energy, pressure, force, power, and frequency.
元素周期表浏览器
交互式元素周期表——点击任意元素探索其属性。