# Year Conversion Calculator

Enter a value in years below to convert to another unit of time.

## What Is a Year?

A year is a unit used to measure time.

Years can be abbreviated as yr (plural yrs), and are also sometimes abbreviated as y. For example, 1 year can be written as 1 yr or 1 y, and 2 years can be written as 2 yrs.

## How Much Is a Year?

One year is the time it takes for the Earth to complete its orbit around the Sun. There are 365 days in a year, with the exception of the leap year when there are 366.

We have leap years because the Earth actually takes 365.2425 days to revolve around the sun, but we round to 365 for convenience. However, since we miss a quarter of a day per revolution around the sun, this means that we add an extra day to the year once every 4 years, hence the leap year.

This can make conversions to days more difficult, since it is important to know if the particular year in question is a leap year. For this reason, the calculator above uses 365.2425 days per year for its conversions.

## How to Convert Years

To convert years to another unit of time, you need to multiply the value by a conversion factor. A conversion factor is a numerical value used to change the units of a measurement without changing the value.[1]

You can find the conversion factors for years in the conversion table below.

Then, multiply the time measurement by the conversion factor to find the equivalent value in the desired unit of measurement.

years × conversion factor = result

You can also use a calculator, such as one of the converters below, for the conversion.

## Year Conversion Table

Years and the equivalent time durations
years centuries decades months weeks days hours minutes seconds milliseconds microseconds nanoseconds
1 yr 0.01 c 0.1 12 mo 52.1775 wk 365.2425 d 8,766 hr 525,949 min 31,556,952 s 31,556,952,000 ms 31,556,952,000,000 µs 31,557,000,000,000,000 ns
2 yr 0.02 c 0.2 24 mo 104.355 wk 730.485 d 17,532 hr 1,051,898 min 63,113,904 s 63,113,904,000 ms 63,113,904,000,000 µs 63,114,000,000,000,000 ns
3 yr 0.03 c 0.3 36 mo 156.5325 wk 1,096 d 26,297 hr 1,577,848 min 94,670,856 s 94,670,856,000 ms 94,670,856,000,000 µs 94,671,000,000,000,000 ns
4 yr 0.04 c 0.4 48 mo 208.71 wk 1,461 d 35,063 hr 2,103,797 min 126,227,808 s 126,227,808,000 ms 126,230,000,000,000 µs 126,230,000,000,000,000 ns
5 yr 0.05 c 0.5 60 mo 260.8875 wk 1,826 d 43,829 hr 2,629,746 min 157,784,760 s 157,784,760,000 ms 157,780,000,000,000 µs 157,780,000,000,000,000 ns
6 yr 0.06 c 0.6 72 mo 313.065 wk 2,191 d 52,595 hr 3,155,695 min 189,341,712 s 189,341,712,000 ms 189,340,000,000,000 µs 189,340,000,000,000,000 ns
7 yr 0.07 c 0.7 84 mo 365.2425 wk 2,557 d 61,361 hr 3,681,644 min 220,898,664 s 220,898,664,000 ms 220,900,000,000,000 µs 220,900,000,000,000,000 ns
8 yr 0.08 c 0.8 96 mo 417.42 wk 2,922 d 70,127 hr 4,207,594 min 252,455,616 s 252,455,616,000 ms 252,460,000,000,000 µs 252,460,000,000,000,000 ns
9 yr 0.09 c 0.9 108 mo 469.5975 wk 3,287 d 78,892 hr 4,733,543 min 284,012,568 s 284,012,568,000 ms 284,010,000,000,000 µs 284,010,000,000,000,000 ns
10 yr 0.1 c 1 120 mo 521.775 wk 3,652 d 87,658 hr 5,259,492 min 315,569,520 s 315,569,520,000 ms 315,570,000,000,000 µs 315,570,000,000,000,000 ns
11 yr 0.11 c 1.1 132 mo 573.9525 wk 4,018 d 96,424 hr 5,785,441 min 347,126,472 s 347,126,472,000 ms 347,130,000,000,000 µs 347,130,000,000,000,000 ns
12 yr 0.12 c 1.2 144 mo 626.13 wk 4,383 d 105,190 hr 6,311,390 min 378,683,424 s 378,683,424,000 ms 378,680,000,000,000 µs 378,680,000,000,000,000 ns
13 yr 0.13 c 1.3 156 mo 678.3075 wk 4,748 d 113,956 hr 6,837,340 min 410,240,376 s 410,240,376,000 ms 410,240,000,000,000 µs 410,240,000,000,000,000 ns
14 yr 0.14 c 1.4 168 mo 730.485 wk 5,113 d 122,721 hr 7,363,289 min 441,797,328 s 441,797,328,000 ms 441,800,000,000,000 µs 441,800,000,000,000,000 ns
15 yr 0.15 c 1.5 180 mo 782.6625 wk 5,479 d 131,487 hr 7,889,238 min 473,354,280 s 473,354,280,000 ms 473,350,000,000,000 µs 473,350,000,000,000,000 ns
16 yr 0.16 c 1.6 192 mo 834.84 wk 5,844 d 140,253 hr 8,415,187 min 504,911,232 s 504,911,232,000 ms 504,910,000,000,000 µs 504,910,000,000,000,000 ns
17 yr 0.17 c 1.7 204 mo 887.0175 wk 6,209 d 149,019 hr 8,941,136 min 536,468,184 s 536,468,184,000 ms 536,470,000,000,000 µs 536,470,000,000,000,000 ns
18 yr 0.18 c 1.8 216 mo 939.195 wk 6,574 d 157,785 hr 9,467,086 min 568,025,136 s 568,025,136,000 ms 568,030,000,000,000 µs 568,030,000,000,000,000 ns
19 yr 0.19 c 1.9 228 mo 991.3725 wk 6,940 d 166,551 hr 9,993,035 min 599,582,088 s 599,582,088,000 ms 599,580,000,000,000 µs 599,580,000,000,000,000 ns
20 yr 0.2 c 2 240 mo 1,044 wk 7,305 d 175,316 hr 10,518,984 min 631,139,040 s 631,139,040,000 ms 631,140,000,000,000 µs 631,140,000,000,000,000 ns

## Year Conversion Calculators

You can also convert time using one of our year converters below.

## References

1. National Institute of Standards & Technology, Unit Conversion, https://www.nist.gov/pml/owm/metric-si/unit-conversion