Sumwise

Years to seconds

seconds = years × 31,557,600

Reverse: seconds to years

How to convert years to seconds

One year is 31,557,600 seconds, so multiply the number of years by 31,557,600. For example, 20 years is 20 × 31,557,600 = 631,152,000 seconds. To go back, divide by the same number, or multiply by 3.168809e-8.

Quick estimate

Multiplying by about 30000000 gets within 4.9% of the exact answer, which is enough to check that a result makes sense.

Where it comes up

Time conversions come up in planning and scheduling, timesheets and pay, project estimates and working out ages or durations.

yearsseconds
1 yr31,557,600 s
2 yr63,115,200 s
3 yr94,672,800 s
4 yr126,230,400 s
5 yr157,788,000 s
6 yr189,345,600 s
7 yr220,903,200 s
8 yr252,460,800 s
9 yr284,018,400 s
10 yr315,576,000 s
11 yr347,133,600 s
12 yr378,691,200 s
13 yr410,248,800 s
14 yr441,806,400 s
15 yr473,364,000 s
16 yr504,921,600 s
17 yr536,479,200 s
18 yr568,036,800 s
19 yr599,594,400 s
20 yr631,152,000 s
25 yr788,940,000 s
30 yr946,728,000 s
40 yr1,262,304,000 s
50 yr1,577,880,000 s
60 yr1,893,456,000 s
70 yr2,209,032,000 s
75 yr2,366,820,000 s
80 yr2,524,608,000 s
90 yr2,840,184,000 s
100 yr3,155,760,000 s
120 yr3,786,912,000 s
150 yr4,733,640,000 s
200 yr6,311,520,000 s
250 yr7,889,400,000 s
300 yr9,467,280,000 s
400 yr12,623,040,000 s
500 yr15,778,800,000 s
750 yr23,668,200,000 s
1,000 yr31,557,600,000 s
1,500 yr47,336,400,000 s
2,000 yr63,115,200,000 s
5,000 yr157,788,000,000 s
10,000 yr315,576,000,000 s

Questions

How many seconds are in a year?

31,557,600 seconds.

How do I convert years to seconds in a spreadsheet?

Put the value in A1 and type =A1*31557600, then fill the formula down the column.

Are the values in the table exact?

They are calculated from the exact definitions of the units and rounded only for display. Open any row for the full working.