Decades to Years Conversion Calculator

Convert decades to years quickly and easily with our free online calculator.

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How to Convert Decades to Years

To convert from decades to years, multiply your decades value by 10. For example, 1 decade equals 10 years.

Common Conversions

  • 1 decade = 10 years
  • 2 decades = 20 years
  • 3 decades = 30 years
  • 5 decades = 50 years
  • 10 decades = 100 years (1 century)
  • 100 decades = 1,000 years (1 millennium)

How to Use

  1. Enter the number of decades in the input field
  2. The result in years will be calculated automatically
  3. The conversion uses the standard ratio (1 decade = 10 years)

About the Conversion

The decade to year conversion is useful for understanding historical periods, calculating long-term timelines, planning multi-year projects, and converting decade-based measurements into annual periods.

Set the calculator to your desired defaults above, then copy the code below.

Or set custom default values:

Decade to Year Conversion Table

Common Decades to Years conversions:

Common Decade to Year conversion values
Decades (dec) Years (yr)
1 10
2 20
3 30
4 40
5 50
10 100
15 150
20 200
25 250
50 500
75 750
100 1,000
250 2,500
500 5,000
1,000 10,000

Frequently Asked Questions

How many years are in 1 decade?
There are 10 years in 1 decade.
How do you convert decades to years?
To convert decades to years, multiply the number of decades by 10. For example, 5 decades = 50 years.
How many decades are in 1 year?
There are 0.1 decades in 1 year.

Time Conversion Table

Select a conversion from the table below. Click any cell to convert between units.

From / To Century Day Decade Hour Millennium Millisecond Minute Second Week Year
Century — Century to Day Century to Decade Century to Hour Century to Millennium Century to Millisecond Century to Minute Century to Second Century to Week Century to Year
Day Day to Century — Day to Decade Day to Hour Day to Millennium Day to Millisecond Day to Minute Day to Second Day to Week Day to Year
Decade Decade to Century Decade to Day — Decade to Hour Decade to Millennium Decade to Millisecond Decade to Minute Decade to Second Decade to Week Decade to Year
Hour Hour to Century Hour to Day Hour to Decade — Hour to Millennium Hour to Millisecond Hour to Minute Hour to Second Hour to Week Hour to Year
Millennium Millennium to Century Millennium to Day Millennium to Decade Millennium to Hour — Millennium to Millisecond Millennium to Minute Millennium to Second Millennium to Week Millennium to Year
Millisecond Millisecond to Century Millisecond to Day Millisecond to Decade Millisecond to Hour Millisecond to Millennium — Millisecond to Minute Millisecond to Second Millisecond to Week Millisecond to Year
Minute Minute to Century Minute to Day Minute to Decade Minute to Hour Minute to Millennium Minute to Millisecond — Minute to Second Minute to Week Minute to Year
Second Second to Century Second to Day Second to Decade Second to Hour Second to Millennium Second to Millisecond Second to Minute — Second to Week Second to Year
Week Week to Century Week to Day Week to Decade Week to Hour Week to Millennium Week to Millisecond Week to Minute Week to Second — Week to Year
Year Year to Century Year to Day Year to Decade Year to Hour Year to Millennium Year to Millisecond Year to Minute Year to Second Year to Week —