⌛ 阿秒 ↔ 飞秒Attosecond to Femtosecond
阿秒与飞秒互算（1 as = 0.001 fs）。本地换算，附常用相关单位。Convert attosecond and femtosecond (1 as = 0.001 fs). Runs locally with related units.
点击任意一行可复制该结果；小于 0.0001 或不小于 10¹⁵ 的数值用 × 10ⁿ 科学计数法显示Click any row to copy that result. Values below 0.0001 or at least 10¹⁵ are shown in × 10ⁿ notation
使用说明与常见问题How-to & FAQ
「阿秒 ↔ 飞秒」是什么？What is the Attosecond to Femtosecond tool?
阿秒与飞秒互算（1 as = 0.001 fs）。本地换算，附常用相关单位。Convert attosecond and femtosecond (1 as = 0.001 fs). Runs locally with related units.
如何使用「阿秒 ↔ 飞秒」？How do I use the Attosecond to Femtosecond tool?
在「阿秒 ↔ 飞秒」中输入数值并选择原单位，表格会同时列出换算到所有其他单位的结果，可一键复制。Enter a value in the Attosecond to Femtosecond and choose the source unit; the table shows the value in every other unit at once, ready to copy.
1 阿秒等于多少飞秒？How many femtosecond in 1 attosecond?
1 as = 0.001 fs（按国际定义系数）。1 as = 0.001 fs (international definition).
如何把阿秒换算成飞秒？How do I convert attosecond to femtosecond?
结果 = 数值 × 0.001。例如 1000 as = 1 fs。result = value × 0.001. Example: 1000 as = 1 fs.
阿秒/飞秒属于哪类单位？What kind of units are attosecond/femtosecond?
二者同属「时间」量纲，可安全互算；也可打开「time-unit-converter」做多单位对照。Both are time units; see also the time unit converter hub.
换算系数准确吗？Are the conversion factors exact?
「阿秒 ↔ 飞秒」采用国际单位制（SI）或公认标准中的定义值作为换算系数，结果保留约 10 位有效数字。The Attosecond to Femtosecond uses factors defined by the SI or other recognised standards and shows about 10 significant digits.
「阿秒 ↔ 飞秒」免费吗？需要注册吗？Is the Attosecond to Femtosecond free? Do I need an account?
「阿秒 ↔ 飞秒」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 Attosecond to Femtosecond is completely free with no sign-up or install and works on phones and desktops; what you enter is processed only in your browser.