How to convert years to seconds
Years and Seconds both measure time, so converting is a single multiplication. One yr equals 31,557,600 s, so you multiply your years value by 31,557,600.
Formula: seconds = years × 31,557,600. For example, 10 yr = 315,576,000 s.
Years to Seconds conversion table
| Years (yr) | Seconds (s) |
|---|---|
| 1 | 31,557,600 |
| 2 | 63,115,200 |
| 5 | 157,788,000 |
| 10 | 315,576,000 |
| 25 | 788,940,000 |
| 50 | 1,577,880,000 |
| 100 | 3,155,760,000 |
| 1,000 | 31,557,600,000 |
Years and Seconds explained
Years (yr): About 365.25 days, accounting for leap years.
Seconds (s): The SI base unit of time.
When you'd convert years to seconds
You'll convert years to seconds whenever a measurement is given in one unit but you need it in the other — comparing years and seconds figures across regions, following a recipe or spec, or double-checking a number. Because 1 yr is exactly 31,557,600 s, the result is precise every time.
Frequently asked questions
How many seconds are in a year?
One yr equals 31,557,600 s. Multiply your years figure by 31,557,600 to get seconds.
What is the formula to convert years to seconds?
seconds = years × 31,557,600. The factor 31,557,600 is exact.
What is 2 years in seconds?
2 yr = 63,115,200 s. You can enter any value in the converter above to get an instant result.
Is this Years to Seconds converter accurate?
Yes. It uses the standard conversion factor (1 yr = 31,557,600 s) defined by BIPM — SI Brochure (definition of the second), so results are exact to several decimal places.