⏱️ 土卫三自转日 ↔ 土卫八自转日Tethys day to Iapetus day
土卫三自转日与土卫八自转日互算（1 d Tet = 0.0237004578 d Iap）。本地换算，附常用相关单位。Convert Tethys day and Iapetus day (1 d Tet = 0.0237004578 d Iap). 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
「土卫三自转日 ↔ 土卫八自转日」是什么？What is the Tethys day to Iapetus day tool?
土卫三自转日与土卫八自转日互算（1 d Tet = 0.0237004578 d Iap）。本地换算，附常用相关单位。Convert Tethys day and Iapetus day (1 d Tet = 0.0237004578 d Iap). Runs locally with related units.
如何使用「土卫三自转日 ↔ 土卫八自转日」？How do I use the Tethys day to Iapetus day tool?
在「土卫三自转日 ↔ 土卫八自转日」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 Tethys day to Iapetus day and choose the source unit; the table shows the value in every other unit at once, ready to copy.
1 土卫三自转日等于多少土卫八自转日？How many Iapetus day in 1 Tethys day?
1 d Tet = 0.0237004578 d Iap（按国际定义系数）。1 d Tet = 0.0237004578 d Iap (international definition).
如何把土卫三自转日换算成土卫八自转日？How do I convert Tethys day to Iapetus day?
结果 = 数值 × 0.0237004578。例如 1 d Tet = 0.0237004578 d Iap。result = value × 0.0237004578. Example: 1 d Tet = 0.0237004578 d Iap.
土卫三自转日/土卫八自转日属于哪类单位？What kind of units are Tethys day/Iapetus day?
二者同属「时间」量纲，可安全互算；也可打开「time-converter」做多单位对照。Both are time units; see also the time converter hub.
换算系数准确吗？Are the conversion factors exact?
「土卫三自转日 ↔ 土卫八自转日」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 Tethys day to Iapetus day uses factors defined by the SI or other recognised standards and shows about 10 significant digits.
「土卫三自转日 ↔ 土卫八自转日」免费吗？需要注册吗？Is the Tethys day to Iapetus day free? Do I need an account?
「土卫三自转日 ↔ 土卫八自转日」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 Tethys day to Iapetus day is completely free with no sign-up or install and works on phones and desktops; what you enter is processed only in your browser.