Decades to Years (dec to yr) Converter

How to convert decades to years

Formulayr = dec × 10

Multiply the value in decades by 10. To go the other way, multiply by 0.1 (or divide by 10).

A decade is larger than a year: one decade contains 10 years.

Worked examples

1 decade1 dec × 10 = 10 yr
5 decades5 dec × 10 = 50 yr
10 decades10 dec × 10 = 100 yr
20 decades20 dec × 10 = 200 yr
100 decades100 dec × 10 = 1,000 yr

Decades to years conversion table

Values are calculated by the conversion engine and rounded to 8 significant figures.

Decades to years: 0.1–10 dec
Decades (dec)	Years (yr)
0.1 dec	1 yr
0.25 dec	2.5 yr
0.5 dec	5 yr
1 dec	10 yr
2 dec	20 yr
3 dec	30 yr
4 dec	40 yr
5 dec	50 yr
6 dec	60 yr
7 dec	70 yr
8 dec	80 yr
9 dec	90 yr
10 dec	100 yr

Decades to years: 12–1,000 dec
Decades (dec)	Years (yr)
12 dec	120 yr
15 dec	150 yr
20 dec	200 yr
25 dec	250 yr
30 dec	300 yr
40 dec	400 yr
50 dec	500 yr
75 dec	750 yr
100 dec	1,000 yr
250 dec	2,500 yr
500 dec	5,000 yr
1,000 dec	10,000 yr

About the units

Decade (dec)

The decade (dec) is a unit of time. One decade equals 315,569,520 seconds (s).

Year (yr)

The mean Gregorian calendar year of 365.2425 days, which accounts for leap years. One year equals 31,556,952 seconds (s).

Frequently asked questions

How many years are in one decade?

There are 10 years in one decade, and this value is exact by definition.

How do I convert decades to years?

Multiply the number of decades by 10. For example, 10 dec × 10 = 100 yr.

How many decades are in one year?

One year equals 0.1 decades. That is the reverse factor, 1 ÷ 10.

What is 10 decades in years?

10 dec = 100 yr.

Is this dec to yr converter accurate?

Yes. Both units are defined exactly in terms of SI units, so the conversion factor is exact; results are shown to 12 significant figures by default and you can change precision in the converter. Calculations run in your browser using the same tested engine that generated this page.

Decades to Years Converter