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🧊 密度质量体积计算器Density, Mass & Volume Calculator
填写密度、质量、体积中的任意两个，计算第三个（ρ = m / V），并对照常见物质密度。Enter any two of density, mass and volume to find the third (ρ = m/V), with common material densities.
使用说明与常见问题How-to & FAQ
「密度质量体积计算器」是什么？What is the Density, Mass & Volume Calculator?
填写密度、质量、体积中的任意两个，计算第三个（ρ = m / V），并对照常见物质密度。Enter any two of density, mass and volume to find the third (ρ = m/V), with common material densities.
如何使用「密度质量体积计算器」？How do I use the Density, Mass & Volume Calculator?
在「密度质量体积计算器」中，填写「密度 g/cm³」、「质量 g」、「体积 cm³」等参数，结果会随输入实时计算并显示在下方。In the Density, Mass & Volume Calculator: Fill in "Density g/cm³", "Mass g", "Volume cm³"; results are recalculated instantly as you type.
计算结果可以用于作业或工程吗？Can I use the results for homework or engineering?
「密度质量体积计算器」使用教科书标准公式，并列出所用公式和中间值，适合学习和估算核对；涉及安全的工程设计请以规范和实测为准。The Density, Mass & Volume Calculator uses standard textbook formulas and shows them, which is good for learning and checking estimates; for safety-critical engineering follow codes and measured values.
「密度质量体积计算器」免费吗？需要注册吗？Is the Density, Mass & Volume Calculator free? Do I need an account?
「密度质量体积计算器」完全免费，无需注册或安装，打开网页即可使用，手机和电脑都能用；输入的内容只在你的浏览器本地处理。The Density, Mass & Volume Calculator is completely free with no sign-up or install and works on phones and desktops; what you enter is processed only in your browser.