📈 指数增长计算器Exponential Growth Calculator
按增长率计算指数增长（或衰减）后的数值，支持离散复合和连续增长，并给出翻倍（或减半）时间。Value after exponential growth or decay at a given rate, discrete or continuous, with doubling (or halving) time.
使用说明与常见问题How-to & FAQ
「指数增长计算器」是什么？What is the Exponential Growth Calculator tool?
按增长率计算指数增长（或衰减）后的数值，支持离散复合和连续增长，并给出翻倍（或减半）时间。Value after exponential growth or decay at a given rate, discrete or continuous, with doubling (or halving) time.
如何使用「指数增长计算器」？How do I use the Exponential Growth Calculator tool?
在「指数增长计算器」中，填写「初始值 x₀」、「增长率 %（负数为衰减）」、「时间（期数）」、「模型」等参数，结果会随输入实时计算并显示在下方。In the Exponential Growth Calculator: Fill in "Initial value x₀", "Growth rate % (negative = decay)", "Time (periods)", "Model"; results are recalculated instantly as you type.
计算精度如何？How precise are the results?
「指数增长计算器」使用 JavaScript 双精度浮点数（约 15–16 位有效数字）；极大或极小的数值可能存在精度误差。The Exponential Growth Calculator uses double-precision floating point (about 15–16 significant digits); very large or very small values may lose precision.
「指数增长计算器」免费吗？需要注册吗？Is the Exponential Growth Calculator free? Do I need an account?
「指数增长计算器」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 Exponential Growth 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.