Years to Seconds (yr to s) Converter
1 year equals 31,557,600 seconds on average — multiply years by 31557600 to convert. This is 365.25 average days × 24 × 60 × 60 seconds.
The formula
To convert years to seconds, multiply by 31557600:
seconds = years × 31557600
For example, 10 years × 31557600 = 315,576,000 seconds. To reverse it, divide by 31557600 (or multiply by 3.168809e-8).
Conversion table
| Years (yr) | Seconds (s) |
|---|---|
| 1 | 31557600 |
| 2 | 63115200 |
| 3 | 94672800 |
| 5 | 157788000 |
| 10 | 315576000 |
| 25 | 788940000 |
| 50 | 1577880000 |
| 100 | 3155760000 |
| 500 | 15778800000 |
| 1000 | 31557600000 |
How to convert online
- Type the number of years into the first box.
- Read the second result instantly in the second box.
- Or enter a second value to convert back to years.
Use the Year to Second Converter — free and instant in your browser.
Where this conversion is used
Years to seconds is common in physics and astronomy, software timers and epoch math, and any calculation where large timespans must be expressed in the SI base unit of time.
FAQ
How many seconds are in a year?
On average a year has 31,557,600 seconds, so 10 years is 315,576,000 seconds. A 365-day year has 31,536,000 seconds.
What is the formula to convert years to seconds?
Multiply the year value by 31557600: seconds = years × 31557600. The converter applies this factor automatically.
How do I convert seconds back to years?
Divide by 31557600. For instance, 315,576,000 s ÷ 31557600 = 10 years.
Why 31,557,600 and not 31,536,000?
31,557,600 uses 365.25 average days to include leap years. Use 31,536,000 for exactly one 365-day year.
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