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seconds, minutes, hours, days.
The time converter changes a duration between milliseconds, seconds, minutes, hours, days, weeks, months and years, updating live as you type.
Fixed units (second up to week) convert exactly. Because calendar months and years vary in length, this tool uses averages: a month of 30.4375 days and a year of 365.25 days, converted through seconds.
1 day = 86,400 s, 1 week = 604,800 s, average month = 2,629,800 s, average year = 31,557,600 s.
An average of 30.4375 days (2,629,800 seconds), which is one-twelfth of a 365.25-day year. Actual months range from 28 to 31 days.
That average accounts for the leap day added roughly every four years, giving the Julian year of 365.25 days used for smooth conversions.
Yes. Milliseconds through weeks are fixed multiples of the second, so those conversions carry no approximation.