Year To Decade Conversion Chart

Year (y) Decade (dec)
1 y0.1 dec
2 y0.2 dec
3 y0.3 dec
4 y0.4 dec
5 y0.5 dec
6 y0.6 dec
7 y0.7 dec
8 y0.8 dec
9 y0.9 dec
10 y1 dec
20 y2 dec
50 y5 dec
100 y10 dec


A year is the orbital period of a planetary body, for example, the Earth, moving in its orbit around the Sun. Year is a cycle in the Gregorian calendar of 365 or 366 days divided into 12 months beginning with January and ending with December


A decade is a period of 10 years. Decades may describe any ten-year period, such as those of a person's life, or refer to specific groupings of calendar years.