How many seconds are in 1 years?

1 years (yr) is exactly 31,557,600 seconds (s).

How do I convert years to seconds?

Multiply the value in years by 31,557,600 to get the result in seconds. Or use the converter above — type any number and see the result instantly.

Years (yr) to Seconds (s) Conversion

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Years

The year is based on Earth's orbital period around the Sun. The Julian year used in astronomy is exactly 365.25 days (31,557,600 seconds). The Gregorian calendar approximates the tropical year as 365.2425 days through its leap year rule, achieving accuracy to within 26 seconds per year. In geology, time spans are expressed in millions of years (Ma) or billions of years (Ga).

Seconds

The second is the SI base unit of time, defined since 1967 as the duration of exactly 9,192,631,770 cycles of radiation from the caesium-133 atom. Atomic clocks based on this definition lose less than one second in 300 million years. The second underpins all timekeeping in modern civilisation — from GPS satellite synchronisation to internet protocols and financial transaction timestamps.

Years (yr) to Seconds (s) - Conversion Table
Years (yr)	Seconds (s)
0.1 yr	3155760 s
1 yr	31557600 s
2 yr	63115200 s
3 yr	94672800 s
5 yr	157788000 s
10 yr	315576000 s
20 yr	631152000 s
30 yr	946728000 s
50 yr	1577880000 s
100 yr	3155760000 s
1000 yr	31557600000 s

Convert Years (yr) to other units of Time

List of Conversions
‣ Years (yr) to nanoseconds (ns)
‣ Years (yr) to microseconds (μs)
‣ Years (yr) to milliseconds (ms)
‣ Years (yr) to seconds (s)
‣ Years (yr) to minutes (min)
‣ Years (yr) to hours (h)
‣ Years (yr) to days (d)
‣ Years (yr) to weeks (wk)
‣ Years (yr) to fortnights (fn)
‣ Years (yr) to months (mo)
‣ Years (yr) to decades (dec)
‣ Years (yr) to centuries (c.)
‣ Years (yr) to millennia (mil.)