⏱️ Time Unit Converter

Convert a time duration between seconds, minutes, hours, days, weeks and years (365-day year).

Value

From Unit

Seconds are the base unit

Your duration is turned into seconds, then divided out into the other five units. Each step multiplies by the one before it:

1 minute = 60 s
1 hour   = 60 × 60          = 3,600 s
1 day    = 24 × 3,600       = 86,400 s
1 week   = 7 × 86,400       = 604,800 s
1 year   = 365 × 86,400     = 31,536,000 s

Every factor above is a whole number except the last division you are likely to want: a year holds 52.142857 weeks, not 52, because 365 does not divide by 7.

The numbers people are usually after

Duration	Seconds	Minutes	Hours	Days
1 hour	3,600	60	1	0.0417
1 day	86,400	1,440	24	1
1 week	604,800	10,080	168	7
30 days	2,592,000	43,200	720	30
1 year	31,536,000	525,600	8,760	365

Two that come up in contracts and cache settings: 86,400 seconds is a day, and 604,800 is a week. If you work 40 hours across 52 weeks, that is 2,080 hours before any leave is taken off.

This converter uses a flat 365-day year and has no month unit, both on purpose. A calendar year averages 365.2425 days, so a leap year adds 86,400 seconds, and months run from 28 to 31 days. For anything billed or scheduled by the calendar, count the actual dates rather than converting from years.

Frequently asked questions

How many seconds are in a day?

86,400 seconds, from 24 hours of 60 minutes of 60 seconds. It is the number behind a one day cache header or token lifetime, and a week is 604,800.

How many hours are in a year?

8,760 hours in a 365 day year, which is what this tool reports. A leap year has 8,784 hours, and the average calendar year works out at 8,765.82.

How many weeks are in a year?

52.142857 weeks, so a year is 52 weeks plus one day, or plus two days in a leap year. That leftover day is why a fixed date shifts forward one weekday each year.