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Seconds to Years Converter

Convert seconds (s) to years (average Gregorian) (yr), with the formula, a conversion table and exact factors.

Change the values and press Calculate to work out your own figures.

Enter a length of time, choose its unit and the unit you want. The answer is exact until it is shown, and the same value appears in every other unit.

About valueA number, fraction (3/8), mixed number (1 1/2), scientific notation (2.5e6) or a simple sum such as 2*3.
About toThe unit you want the answer in. Swap exchanges the two units.
Result
Result
3.16887385068 × 10⁻⁸ yr
centuries
3.16887385068 × 10⁻¹⁰ c.
decades
3.16887385068 × 10⁻⁹ dec
months (average)
3.80264862082 × 10⁻⁷ mo
weeks
1.65343915344 × 10⁻⁶ wk
days
1.15740740741 × 10⁻⁵ d
hours
0.000277777777778 h
minutes
0.0166666666667 min
milliseconds
1,000 ms
microseconds
1,000,000 µs
nanoseconds
1,000,000,000 ns

1 s = 3.16887385068 × 10⁻⁸ yr

Show the working
  1. 1 s = 3.16887385068e-8 yr
  2. 1 × 3.16887385068e-8 = 3.16887385068e-8 yr

How to convert seconds to years

1 yr = 31,556,952 s, so divide by 31,556,952 to go from seconds to years (average Gregorian) (1 s = 3.16887385068 × 10⁻⁸ yr).

yr = s ÷ 31,556,952
s = yr × 31,556,952

Worked example:

1 s = 3.16887385068e-8 yr
5 × 3.16887385068e-8 = 1.58443692534e-7 yr

Seconds to years table

SecondsYears
1 s3.16887385068 × 10⁻⁸ yr
2 s6.33774770136 × 10⁻⁸ yr
3 s9.50662155204 × 10⁻⁸ yr
4 s1.26754954027 × 10⁻⁷ yr
5 s1.58443692534 × 10⁻⁷ yr
6 s1.90132431041 × 10⁻⁷ yr
7 s2.21821169548 × 10⁻⁷ yr
8 s2.53509908054 × 10⁻⁷ yr
9 s2.85198646561 × 10⁻⁷ yr
10 s3.16887385068 × 10⁻⁷ yr
15 s4.75331077602 × 10⁻⁷ yr
20 s6.33774770136 × 10⁻⁷ yr
25 s7.9221846267 × 10⁻⁷ yr
30 s9.50662155204 × 10⁻⁷ yr
40 s1.26754954027 × 10⁻⁶ yr
50 s1.58443692534 × 10⁻⁶ yr
75 s2.37665538801 × 10⁻⁶ yr
100 s3.16887385068 × 10⁻⁶ yr
250 s7.9221846267 × 10⁻⁶ yr
500 s1.58443692534 × 10⁻⁵ yr
1000 s3.16887385068 × 10⁻⁵ yr

About the units

Years (yr)
Years (average Gregorian), a specialised unit. 365.2425 days, the average Gregorian calendar year. Definition: BIPM SI Brochure, 9th edition (SI units, prefixes and units accepted for use with the SI).

Formula version 0.1.0Reviewed