Convert Year to Second
Use this free converter to change years (yr) into seconds (s). Year and second both measure time. As a quick reference, 1 yr equals 31557600 s, and 1 s equals 3.1688e-8 yr.
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Second (s)
31557600
1 yr = 31557600 s
Time conversion table
| Year | Second |
|---|---|
| 0.01 | 315576 |
| 0.1 | 3155760 |
| 0.5 | 15778800 |
| 1 | 31557600 |
| 2 | 63115200 |
| 3 | 94672800 |
| 5 | 157788000 |
| 10 | 315576000 |
| 20 | 631152000 |
| 25 | 788940000 |
| 50 | 1577880000 |
| 100 | 3155760000 |
| 1,000 | 31557600000 |
How to convert Year to Second
Multiply the year value by 31557600 to get seconds.
- Enter the number of years you want to convert.
- The converter instantly shows the equivalent value in seconds.
- Worked example: 15 yr × 31557600 = 473364000 s.
- Use the swap button to reverse the conversion (second to year).
About these units
Year (yr)
- Definition
- A year (yr) is the time for the Earth to orbit the Sun, about 365.25 days.
- History
- Calendars from the Julian to the Gregorian refined the year to keep the seasons aligned.
- Current use
- Years are the standard unit for age, anniversaries, and long-term measurement.
Second (s)
- Definition
- The second (s) is the SI base unit of time, defined by the radiation frequency of the caesium-133 atom.
- History
- Once 1/86,400 of a day, it was redefined in 1967 using atomic transitions for far greater precision.
- Current use
- The second is the foundation of timekeeping in science, technology, and daily life.
Frequently asked questions
How many seconds are in a year?
There are 31557600 s in 1 yr. To convert, multiply the number of years by 31557600.
How do I convert years to seconds?
Multiply the year value by 31557600 to get seconds. For example, 10 yr = 315576000 s.
Is this year-to-second converter free?
Yes. This converter is completely free, runs entirely in your browser, and requires no sign-up. Your inputs never leave your device.
Convert Year to other time units
| Unit | 1 Year equals |
|---|---|
| Second (s) | 31557600 s |
| Millisecond (ms) | 31557600000 ms |
| Microsecond (µs) | 3.1558e+13 µs |
| Minute (min) | 525960 min |
| Hour (h) | 8766 h |
| Day (d) | 365.25 d |
| Week (wk) | 52.178571 wk |
| Month (mo) | 12 mo |