Years to seconds
One yr equals 31556952 s. Type any number and the answer appears as you type — the maths happens in your browser.
Result
The same value in every unit
| Unit | Value |
|---|
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Common values
| years | seconds |
|---|---|
| 1 yr | 31556952 s |
| 2 yr | 63113904 s |
| 3 yr | 94670856 s |
| 5 yr | 157784760 s |
| 10 yr | 315569520 s |
| 15 yr | 473354280 s |
| 20 yr | 631139040 s |
| 25 yr | 788923800 s |
| 50 yr | 1577847600 s |
| 100 yr | 3155695200 s |
| 500 yr | 15778476000 s |
| 1000 yr | 31556952000 s |
How to use
- Enter the number of years in the field.
- The result in seconds updates on every keystroke.
- Use the table below for the values people look up most often.
Formula and reverse conversion
The formula
To convert by hand: s = yr × 31556952. Going back the other way, one s is 3.168873851e-8 yr.
How long a month and a year are here
A month here is the average Gregorian month, 30.44 days, and a year is 365.2425 days. That is the right basis for questions like “how many hours in three months”, but not for a specific calendar month.
s = yr × 31556952
Frequently asked questions
How many seconds are in one years?
One yr is 31556952 s.
How do I convert years to seconds?
Multiply by the factor: s = yr × 31556952.
Is the result exact?
The factors are the exact legal definitions, and up to ten significant digits are kept in the answer. Rounding happens only in the display.
How do I convert seconds back to years?
One s is 3.168873851e-8 yr — or open the reverse page linked below.