⏱️ 时间间隔计算器Time Duration Calculator
计算两个时间或日期时间之间相差多少小时、分钟、秒，或时间加减。Calculate the duration between two times or date-times, in hours, minutes and seconds.
使用说明与常见问题How-to & FAQ
「时间间隔计算器」是什么？What is the Time Duration Calculator tool?
计算两个时间或日期时间之间相差多少小时、分钟、秒，或时间加减。Calculate the duration between two times or date-times, in hours, minutes and seconds.
如何使用「时间间隔计算器」？How do I use the Time Duration Calculator tool?
在「时间间隔计算器」中，填写「开始」、「结束」、「休息分钟」等参数，结果会随输入实时计算并显示在下方。In the Time Duration Calculator: Fill in "Start", "End", "Break (min)"; results are recalculated instantly as you type.
时区如何处理？How are time zones handled?
「时间间隔计算器」默认使用你设备的本地时区（按浏览器设置），夏令时由浏览器自动处理。The Time Duration Calculator uses your device's local time zone by default, and daylight saving time is handled by the browser.
「时间间隔计算器」免费吗？需要注册吗？Is the Time Duration Calculator free? Do I need an account?
「时间间隔计算器」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 Time Duration 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.