Decades To Years Conversion - Inch Calculator

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• Decades to Years Converter
• How to Convert Decades to Years
• How Many Years Are in a Decade?
• What Is a Decade?
• What Is a Year?
• Decade to Year Conversion Table

Person Icon By Joe Sexton

Joe is the creator of Inch Calculator and has over 20 years of experience in engineering and construction. He holds several degrees and certifications.

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Sexton, J. (n.d.). Decades to Years Converter. Inch Calculator. Retrieved February 5, 2026, from https://www.inchcalculator.com/convert/decade-to-year/

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:

years = decades × 10

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.

1 decades = 10 yr

Decades and years are both units used to measure time. Keep reading to learn more about each unit of measure.

What Is a Decade?

The decade is a time period of 10 years.

Learn more about decades.

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.

Learn more about years.

Decade to Year Conversion Table

Table showing various decade measurements converted to years.

Decades	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

More Decade & Year Conversions

Calendar IconConvert from Decades

• decades to centuriesChevron Right Icon
• decades to monthsChevron Right Icon
• decades to weeksChevron Right Icon
• decades to daysChevron Right Icon
• decades to hoursChevron Right Icon
• decades to minutesChevron Right Icon
• decades to secondsChevron Right Icon
• decades to millisecondsChevron Right Icon
• decades to microsecondsChevron Right Icon
• decades to nanosecondsChevron Right Icon

Calendar IconConvert to Years

• centuries to yearsChevron Right Icon
• months to yearsChevron Right Icon
• weeks to yearsChevron Right Icon
• days to yearsChevron Right Icon
• hours to yearsChevron Right Icon
• minutes to yearsChevron Right Icon
• seconds to yearsChevron Right Icon
• milliseconds to yearsChevron Right Icon
• microseconds to yearsChevron Right Icon
• nanoseconds to yearsChevron Right Icon