Enter the time in decades below to get the value converted to years.

Results in Years: Do you want to convert years to decades?

## How to Convert Decades to Years

To convert a measurement in decades to a measurement in years, multiply the time by the following conversion ratio: 10 years/decade.

Since one decade is equal to 10 years, you can use this simple formula to convert:

The time in years is equal to the time in decades multiplied by 10.

For example, here's how to convert 5 decades to years using the formula above.
years = (5 decades × 10) = 50 yr

### How Many Years Are in a Decade?

There are 10 years in a decade, which is why we use this value in the formula above.

The decade is a time period of 10 years.

## What 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.

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.

## Decade to Year Conversion Table

Table showing various decade measurements converted to years.
1 10 yr
2 20 yr
3 30 yr
4 40 yr
5 50 yr
6 60 yr
7 70 yr
8 80 yr
9 90 yr
10 100 yr
11 110 yr
12 120 yr
13 130 yr
14 140 yr
15 150 yr
16 160 yr
17 170 yr
18 180 yr
19 190 yr
20 200 yr
21 210 yr
22 220 yr
23 230 yr
24 240 yr
25 250 yr
26 260 yr
27 270 yr
28 280 yr
29 290 yr
30 300 yr
31 310 yr
32 320 yr
33 330 yr
34 340 yr
35 350 yr
36 360 yr
37 370 yr
38 380 yr
39 390 yr
40 400 yr