⏱️ Time Converter

Years to Seconds
( yr → s )

Instantly convert years to seconds. Enter any value below and get an accurate result with the simple formula and reference table.

Converter Tool
yr
s
Result
1 yr = 31,536,000 s
31,536,000
s
The Formula
s = yr × 365 × 86,400
Based on a common year of 365 days. Exact: 1 yr = 31,536,000 s.

How to Convert Years to Seconds

To convert years to seconds, multiply the number of years by 31,536,000. This factor comes from: 1 year = 365 days, 1 day = 86,400 seconds, so 365 × 86,400 = 31,536,000 s.

Step-by-Step Example

Let’s convert 2 years to seconds:

1. Multiply by 31,536,000: 2 × 31,536,000 = 63,072,000 s
2. So 2 years equals exactly 63,072,000 seconds.

For a time of 0.5 years: 0.5 × 31,536,000 = 15,768,000 s.

Note on Leap Years

This converter uses a common year of 365 days. Leap years have 366 days, which would be 31,622,400 seconds. For most general conversions, the common year is used.

When You’d Use Each Unit

Years are used for longer intervals such as age, historical periods, and long-term planning. Seconds are used for everyday timekeeping, sports, and many scientific contexts. Converting between them is useful in programming, science, and understanding timescales.

Conversion Table

Common years values converted to seconds — typical values highlighted.

Years (yr) Seconds (s) Approximate
Frequently Asked Questions
How many seconds are in a year? +
There are 31,536,000 seconds in a common year (365 days).
How do I convert 5 years to seconds? +
5 × 31,536,000 = 157,680,000 s.
What is 1 year in seconds? +
1 year = 31,536,000 s.
How many years in a second? +
One second is approximately 3.171e-8 years.
What is 1 leap year in seconds? +
1 leap year (366 days) = 31,622,400 s.
Can I convert seconds back to years with this tool? +
Yes! Just type a value into the seconds field and the years field updates automatically. Or use the ⇄ swap button to switch directions.
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