单位转换
即时、私密且免费
时间单位换算器.
在毫秒、秒、分钟、小时、天、周、月和年之间转换——外加HH:MM转总分钟数和小数小时。
输入数值
输入时结果会更新。
使用方法
常见问题
How many seconds are in an hour?
There are 3,600 seconds in an hour, 60 in a minute, 86,400 in a day and 604,800 in a week. These conversions are exact.
How many days are in a month for this converter?
It uses the Gregorian mean of 30.436875 days (2,629,746 seconds), which is one twelfth of an average year. Real calendar months range from 28 to 31 days, so treat any month result as an approximation.
How many days are in a year?
This converter uses 365.2425 days (31,556,952 seconds), the Gregorian calendar's long-run average that accounts for leap years and the skipped century leap years. An individual year is 365 or 366 days.
How do I turn HH:MM into decimal hours?
Divide the minutes by 60 and add them to the hours: 7:30 is 7 + 30/60 = 7.5 decimal hours. The secondary readout on this page does it for you, and also gives the total minutes (450), which payroll systems often need.
Which units are exact and which are approximate?
Milliseconds, seconds, minutes, hours, days and weeks are exact fixed ratios. Only months and years are averages, because calendar months and leap years vary in length.