Second to Year Converter (and vice versa)
Created by: tinycalcs.com/en
Number of supported units: 2
Last update: 2026
This converter allows you to convert seconds [s] to years [yr] or years [yr] to seconds [s]. Calculations are performed in both directions. The calculation result and the entered value are displayed with up to 20 decimal places for maximum accuracy.
Convert seconds to years
There are two simple ways to convert seconds [s] to years [yr]. In the first calculation method, the value in seconds [s] is divided by 31,557,600. The second method multiplies the value in seconds [s] by the rounded conversion factor of 3.169 * 10-8.
- Years [yr] = seconds [s] ÷ 31,557,600
- Years [yr] ≈ seconds [s] * 3.169 * 10-8
The calculation method with a rounded conversion value is more suitable for rough conversions from seconds [s] to years [yr], as the calculation result may contain rounding errors. Therefore, the variant with the exact conversion factor is more suitable.
Convert years to seconds
Converting years [yr] to seconds [s] is easy and can be done in two ways. The first method involves multiplication, whereby the value in years [yr] is multiplied by 31,557,600. The second variant is a division. Here, the value in years [yr] is divided by the rounded conversion factor of 3.169 * 10-8.
- Seconds [s] = years [yr] * 31,557,600
- Seconds [s] ≈ years [yr] ÷ (3.169 * 10-8)
The rounded conversion value can cause rounding errors, resulting in inaccurate calculation results. To ensure that the conversion from years [yr] to seconds [s] produces the most accurate calculation result possible, the conversion should be performed using the exact conversion factor.
Converter
Decimal places
How it's calculated
To all available units
Weeks
Ø Centuries
Weeks
Days & hours
Weeks
Ø Decades
Weeks
Hours & minutes
Weeks
Ø Millennia
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