How many seconds is 1 year?
31,556,952 seconds
1 year = 31,556,952 seconds — 365 days 5 hours 49 minutes 12 seconds on a clock.
seconds
31,556,952s
1 yr = 31,556,952 s
Months and years have no fixed length, so this uses the Gregorian average — 365.2425 days a year, 30.436875 days a month. For a span between two real dates, use the date difference calculator.
Quick pairs
How 1 year converts to seconds
Every time conversion goes through the second, which is the SI base unit for time. 1 year is 31,556,952 seconds, and dividing that by the length of one second gives the answer.
1 year = 31,556,952 seconds 1 × 31,556,952 = 31,556,952
Written as a clock reading rather than a decimal, that is 365 days 5 hours 49 minutes 12 seconds. The decimal form is what a form field or a spreadsheet wants; the clock form is what a schedule wants, and the two are not interchangeable.
Where 1 year shows up
This is 365.2425 days at 86,400 seconds each, and two nearby numbers are worth keeping apart from it. The Julian year of exactly 365.25 days comes to 31,557,600 seconds, and that is the one the IAU uses to define the light-year. The physicists' approximation, pi times ten to the seventh, gives 31,415,927 seconds, low by about 0.45 percent, which is close enough for a back-of-envelope estimate and nowhere near close enough for a calendar.
1 year in every time unit
The same span, converted once into each unit the tool supports. The last two rows use the Gregorian average.
| Unit | Amount | Basis |
|---|---|---|
| milliseconds | 31,556,952,000 | Exact definition |
| seconds | 31,556,952 | Exact definition |
| minutes | 525,949 | Exact definition |
| hours | 8,766 | Exact definition |
| days | 365.2 | Exact definition |
| weeks | 52.18 | Exact definition |
| months | 12 | Gregorian average |
| years | 1 | Gregorian average |
Frequently asked questions
How many seconds is 1 year?
1 year = 31,556,952 seconds. 1 year = 31,556,952 seconds, so the conversion is 1 × 31,556,952 = 31,556,952. Because the calculation involves a month or a year, it uses the Gregorian average rather than a real calendar span, so treat it as an estimate.
How long is 1 year on a clock?
365 days 5 hours 49 minutes 12 seconds. That is the same span written out in whole units instead of a decimal, which is usually what you want when you are setting a timer or reading a schedule rather than filling in a form.
Why is this an estimate rather than an exact answer?
Months are 28 to 31 days and years are 365 or 366, so neither has a single fixed length. This page uses the Gregorian average — 365.2425 days a year, which is a twelfth of that, or 30.436875 days, a month. For a span between two real calendar dates, use the date difference calculator instead; it counts the actual days.
What is 1 year in practice?
This is 365.2425 days at 86,400 seconds each, and two nearby numbers are worth keeping apart from it. The Julian year of exactly 365.25 days comes to 31,557,600 seconds, and that is the one the IAU uses to define the light-year. The physicists' approximation, pi times ten to the seventh, gives 31,415,927 seconds, low by about 0.45 percent, which is close enough for a back-of-envelope estimate and nowhere near close enough for a calendar.
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