Seconds to Years Converter
Enter the time in seconds below to convert it to years.
Convert Seconds to Years
Enter a value in seconds (s) to convert to years (yr).
Second to Year Conversion Table
Table showing various second measurements converted to years. Click any preset value or arrow to load it into the converter.
| Seconds (s) | Years (yr) |
|---|---|
| 1 s | 0.000000032 yr |
| 10 s | 0.000000317 yr |
| 100 s | 0.000003169 yr |
| 1,000 s | 0.000031689 yr |
| 10,000 s | 0.000316887 yr |
| 100,000 s | 0.0031689 yr |
| 1,000,000 s | 0.0316887 yr |
| 5,000,000 s | 0.1584437 yr |
| 10,000,000 s | 0.3168874 yr |
| 25,400,000 s | 0.804894 yr |
How to Convert Seconds to Years
To convert seconds to years, multiply the time by the following conversion ratio: 0.000000032 years/second.
Since one second is equal to 0.000000032 years, you can use this simple formula to convert:
The time in years is equal to the time in seconds multiplied by 0.000000032.
For example, here's how to convert 5 seconds to years using the formula above.
How Many Years Are in a Second?
There are 0.000000032 years in a second, which is why we use this value in the formula above.
Our second to year calculator automatically converts your time measurements with full decimal and scientific precision across US customary, imperial, and SI metric standards.
Seconds and years are both units used to measure time. Keep reading to learn more about each unit.
What Is a Second?
Base SI unit of time. It serves as a primary reference unit for measuring time across scientific and practical applications. [1]
The second is classified as an International System of Units (SI) unit of time. Seconds can be abbreviated as s; for example, 1 second can be written as 1 s.
As the primary coherent reference unit for time in this category, all other time units are mathematically anchored to the second (s).
In practice, seconds (s) are widely used across standard time applications within International System of Units (SI) workflows, engineering documentation, and technical data sheets.
What Is a Year?
A year is a unit of time equal to 31,556,952 seconds (s), the base unit for time. Average Gregorian calendar year (31,556,952 seconds). [2]
The year is classified as a standard unit of time. Years can be abbreviated as yr; for example, 1 year can be written as 1 yr.
When working with years (yr) in formulas or technical specifications, always verify whether your target system uses SI metric, US customary, or British imperial standards.
In practice, years (yr) are widely used across large-scale industrial, bulk, and macro-level time specifications within international standard workflows, engineering documentation, and technical data sheets.
When converting time between seconds (s) and years (yr), keep full floating-point precision (1 s = 0.000000032 yr; 1 yr = 31,556,952 s) during intermediate calculations and round only the final year figure to match your instrument tolerance.
More Second & Year Conversions
Need to calculate in the opposite direction? Use our years to seconds calculator to switch your starting unit immediately. You can also explore related tools such as converting years to seconds, converting days to years, or converting months to years.
Frequently Asked Questions
References
- [1]NIST OWM StandardNIST OWM (SI Units — Time)·Time Metrology Standard — Seconds (s) to Years (yr)
- [2]BIPM SpecificationBIPM (SI Base Unit: Second (s))·Unit Specifications: Second (s) & Year (Gregorian 365.2425 d) (yr)
- [3]NIST CUU ReferenceNIST CUU (Non-SI Units Accepted for Use (min, h, d))·Conversion Factors & Mathematical Basis (s to yr)