7️⃣ 72 法则计算器Rule of 72 Calculator
用 72 法则快速估算资金翻倍所需年数，并与精确值比较；或由年数反推所需收益率。Estimate years to double your money with the Rule of 72, compared with the exact figure, or the rate needed.
使用说明与常见问题How-to & FAQ
「72 法则计算器」是什么？What is the Rule of 72 Calculator?
用 72 法则快速估算资金翻倍所需年数，并与精确值比较；或由年数反推所需收益率。Estimate years to double your money with the Rule of 72, compared with the exact figure, or the rate needed.
如何使用「72 法则计算器」？How do I use the Rule of 72 Calculator?
在「72 法则计算器」中，填写「年收益率%」、「或目标翻倍年数」等参数，结果会随输入实时计算并显示在下方。In the Rule of 72 Calculator: Fill in "Annual return %", "or years to double"; results are recalculated instantly as you type.
计算结果可以作为最终依据吗？Can I rely on the result?
「72 法则计算器」按标准公式计算，结果仅供参考；实际金额以银行、券商或税务机关的规则和四舍五入方式为准。The Rule of 72 Calculator uses standard formulas and is for estimation only; actual figures depend on your bank, broker or tax authority's rules and rounding.
「72 法则计算器」免费吗？需要注册吗？Is the Rule of 72 Calculator free? Do I need an account?
「72 法则计算器」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 Rule of 72 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.