Year to Second
Convert Year to Second instantly. Free online astronomy unit converter with exact formula, conversion table and FAQ.
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Astronomy Converter
Convert astronomical length, mass, time, and distance units by compatible family.
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Some unit families need one extra value for a physically accurate result.
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Formula
second = year × 3.1556952e+7
year = second × 3.16887385e-8
Conversion table
| 1 yr | 3.1556952e+7 s |
| 5 yr | 1.5778476e+8 s |
| 10 yr | 3.1556952e+8 s |
| 20 yr | 6.3113904e+8 s |
| 50 yr | 1.5778476e+9 s |
| 100 yr | 3.1556952e+9 s |
| 500 yr | 1.5778476e+10 s |
| 1,000 yr | 3.1556952e+10 s |
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Frequently asked questions
What is the source unit in this conversion?
The source unit is the year (yr). A year uses the average Gregorian year of 365.2425 days.
What is the destination unit in this conversion?
The destination unit is the second (s). The second is the SI base unit of time.
How do I convert year to second?
Multiply the year value by 3.1556952e+7. For example, 10 yr × 3.1556952e+7 = 3.1556952e+8 s.
Is the year to second conversion exact?
Yes. Both units have a fixed, defined relationship to the astronomy converter's time base unit, so the conversion factor is exact rather than a measured approximation.
Where is this conversion commonly used?
It's used in astronomy, physics, and space science whenever a time value expressed in year needs to be compared with, or reported in, second.
Can I convert second back to year?
Yes. Multiply the second value by 3.16887385e-8 to get year.
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About this conversion
This page converts year (yr) to second (s) within the astronomy converter.
A year uses the average Gregorian year of 365.2425 days.
The second is the SI base unit of time.
The formula is second = year × 3.1556952e+7, based on each unit's fixed relationship to the astronomy converter's time base unit.
The conversion is exact, since it relies on a fixed numerical ratio between the two units rather than a measured or approximate value.
Use the calculator above for instant results, or the table below for common year values already converted to second.