🕒 时间转十进制（小时/分钟）Time to Decimal Converter
把时:分:秒（如 2:45:30 或 2h 45m）转换成十进制小时、十进制分钟和总秒数，常用于工时表和计费；也能把 2.75 小时反向换成 2 小时 45 分。Convert hours:minutes:seconds such as 2:45:30 or 2h 45m to decimal hours, decimal minutes and total seconds for timesheets and billing — or turn 2.75 hours back into 2 h 45 min.
使用说明与常见问题How-to & FAQ
「时间转十进制（小时/分钟）」是什么？What is the Time to Decimal Converter tool?
把时:分:秒（如 2:45:30 或 2h 45m）转换成十进制小时、十进制分钟和总秒数，常用于工时表和计费；也能把 2.75 小时反向换成 2 小时 45 分。Convert hours:minutes:seconds such as 2:45:30 or 2h 45m to decimal hours, decimal minutes and total seconds for timesheets and billing — or turn 2.75 hours back into 2 h 45 min.
如何使用「时间转十进制（小时/分钟）」？How do I use the Time to Decimal Converter tool?
在「时间转十进制（小时/分钟）」中，填写「方向」、「时间（时:分:秒）」、「十进制小时」等参数，结果会随输入实时计算并显示在下方。In the Time to Decimal Converter: Fill in "Direction", "Time (h:mm:ss)", "Decimal hours"; results are recalculated instantly as you type.
十进制小时怎么算？How are decimal hours calculated?
十进制小时 = 小时 + 分钟 ÷ 60 + 秒 ÷ 3600。例如 2:45:30 = 2 + 45/60 + 30/3600 ≈ 2.7583 小时。Decimal hours = hours + minutes ÷ 60 + seconds ÷ 3600. For example 2:45:30 = 2 + 45/60 + 30/3600 ≈ 2.7583 hours.
为什么 1.5 小时不是 1 小时 50 分？Why is 1.5 hours not 1 h 50 min?
十进制的 0.5 小时是半小时，即 30 分钟。工时表常用十进制，填写时要先换算，以免少算或多算工资。0.5 of an hour is half an hour — 30 minutes. Timesheets often use decimals, so convert first to avoid under- or over-paying.
支持哪些写法？Which formats work?
2:45、2:45:30、2.5（视为小时）、2h 45m、2 hours 45 minutes、1小时30分 等，前面加负号表示负时长（两个方向都支持）。只写一个数字（如 90）时按小时理解，90 分钟请写成 90m 或 1:30。2:45, 2:45:30, 2.5 (hours), 2h 45m, 2 hours 45 minutes and the Chinese form (1 hour 30 minutes written in characters); a leading minus gives a negative duration, in both directions. A bare number such as 90 is read as hours — write 90m or 1:30 for 90 minutes.
和时区有关吗？Do time zones matter?
无关。「时间转十进制（小时/分钟）」只做时长或日期格式的换算，不读取设备时间，时区和夏令时不影响结果。No. The Time to Decimal Converter only converts durations or date formats and never reads the device clock, so time zones and daylight saving time do not affect the result.
「时间转十进制（小时/分钟）」免费吗？需要注册吗？Is the Time to Decimal Converter free? Do I need an account?
「时间转十进制（小时/分钟）」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 to Decimal Converter is completely free with no sign-up or install and works on phones and desktops; what you enter is processed only in your browser.