Year (average) to Second Converter
1 yr = 31,557,600 s — convert instantly with formula and table.
Enter any number above and the result updates as you type. Everything runs locally in your browser, so it is instant and private.
Quick answer: one year (average) equals 31,557,600 seconds. So to convert years to seconds, multiply by 31,557,600.
How to convert years to seconds
seconds = years × 31,557,600
The average Gregorian year is 365.25 days — 31,557,600 seconds — the figure used for ages, interest rates and astronomy's light-year.
The second is the SI base unit of time, defined by 9,192,631,770 oscillations of a cesium atom — the tick behind every clock on Earth.
Year (average) to Second conversion table
| Year (average) (yr) | Second (s) |
|---|---|
| 0.01 yr | 315,576 s |
| 0.1 yr | 3,155,760 s |
| 0.25 yr | 7,889,400 s |
| 0.4 yr | 12,623,040 s |
| 0.75 yr | 23,668,200 s |
| 1.25 yr | 39,447,000 s |
| 1.75 yr | 55,225,800 s |
| 2.5 yr | 78,894,000 s |
| 3.5 yr | 110,451,600 s |
| 4.5 yr | 142,009,200 s |
| 6 yr | 189,345,600 s |
| 8 yr | 252,460,800 s |
| 10 yr | 315,576,000 s |
| 12 yr | 378,691,200 s |
| 14 yr | 441,806,400 s |
| 16 yr | 504,921,600 s |
| 18 yr | 568,036,800 s |
| 20 yr | 631,152,000 s |
| 24 yr | 757,382,400 s |
| 26 yr | 820,497,600 s |
| 30 yr | 946,728,000 s |
| 35 yr | 1,104,516,000 s |
| 45 yr | 1,420,092,000 s |
| 55 yr | 1,735,668,000 s |
| 65 yr | 2,051,244,000 s |
| 75 yr | 2,366,820,000 s |
| 85 yr | 2,682,396,000 s |
| 95 yr | 2,997,972,000 s |
| 110 yr | 3,471,336,000 s |
| 125 yr | 3,944,700,000 s |
| 175 yr | 5,522,580,000 s |
| 250 yr | 7,889,400,000 s |
| 350 yr | 11,045,160,000 s |
| 450 yr | 14,200,920,000 s |
| 600 yr | 18,934,560,000 s |
| 750 yr | 23,668,200,000 s |
| 900 yr | 28,401,840,000 s |
| 1,500 yr | 47,336,400,000 s |
| 2,500 yr | 78,894,000,000 s |
| 10,000 yr | 315,576,000,000 s |
Need the opposite direction? Use the Second to Year (average) converter, or read our complete guide to time conversions for every formula in one place.
Frequently asked questions
How many seconds are in one year (average)?
One year (average) equals 31,557,600 seconds. Multiply any year (average) value by 31,557,600 to get seconds.
What is 10 years in seconds?
10 years equal 315,576,000 seconds (10 × 31,557,600).
Is the year (average) to second conversion exact?
The conversion factor used here (31,557,600) is based on the internationally agreed definitions of both units, so results are exact up to rounding of the final decimal places.
Is my data stored when I use this converter?
No. The conversion runs entirely in your browser with JavaScript — nothing you type is sent to a server, logged or stored.