How to convert years to seconds
To convert a measurement in years to seconds, multiply the value by 31,556,952. The conversion factor comes from the relationship between both units and the second.
For example, to convert 5 yr to seconds: 5 × 31,556,952 = 157,784,760 s.
What is a year?
A year here is the average Gregorian year, equal to 365.2425 days (31,556,952 seconds), the value that keeps the calendar aligned with the seasons. The Gregorian calendar, introduced in 1582, uses an average year of 365.2425 days achieved through its leap-year rules, refining the older Julian year of 365.25 days.
Common uses of years include: Interest and investment calculations; Age and anniversary tracking; Warranty and contract periods; Astronomical and historical timelines.
What is a second?
A second is the SI base unit of time, defined by the radiation period of the caesium-133 atom (9,192,631,770 cycles). Historically defined as 1/86,400 of a mean solar day, the second was redefined in 1967 using atomic clocks, making it one of the most precisely realized units in all of science.
Common uses of seconds include: Scientific timing and physics experiments; Sports timing and lap records; Computing timeouts and latency measurements; Everyday stopwatch and countdown timing.
Years to seconds worked examples
Here are some common values converted:
1 yr = 31,556,952 s 5 yr = 157,784,760 s 10 yr = 315,569,520 s 50 yr = 1,577,847,600 s 100 yr = 3,155,695,200 s
Frequently asked questions
How many seconds are in one year?
One year (yr) equals 31,556,952 seconds (s). Multiply any value in years by 31,556,952 to convert to seconds.
How do I convert years to seconds?
Multiply the value in years by 31,556,952. For example, 5 yr × 31,556,952 = 157,784,760 s.
How do I convert seconds to years?
Multiply the value in seconds by 0.000000031689, or divide by 31,556,952. Use the swap button on the converter above to reverse the direction.
Is the year to second conversion exact?
Fixed units (second through week) are exact. Month and year use the average Gregorian calendar length (30.44 and 365.2425 days) since these vary in practice.
What is the formula for years to seconds?
The formula is: s = yr × 31,556,952. This comes from the definition of both units relative to the second.