How many years in a decade? How many years in a century and how many years in a millennium? This question’s answer is very simple. Let’s have a look at its answer in detail and know how to calculate it:

## How Many Years is a Decade?

A decade is made up of a period of 10 years.

**Formula: **Multiple numbers of decades with 10 for getting how many years in a decade or to calculate how long is a decade.

For example,

You can calculate how many years make a decade like this:

**1 decade = 10 years****10 decades (10 decades * 10 years) = 100 years****100 decades (100 decades * 10 years) = 1000 years**

## How Many Years in a Century?

A Century is made up of a period of 100 years or 10 decades.

**Formula: **Multiple numbers of the century with 100 for getting how many years in a century.

For example,

You can calculate number of years for centuries like this:

**1 century = 100 years****10 centuries (10 centuries * 100 years) = 1000 years****100 centuries (100 centuries * 100 years) = 10000 years**

## How Many Years is a Millennium?

A Millennium is made up of 1000 years or 100 decades or 10 centuries.

**Formula: **Multiple numbers of the millennium with 1000 for getting how many years in a millennium.

For example,

You can calculate the number of years for a millennium like this:

**1 millennium = 1000 years****10 millenniums (10 millenniums * 1000 years) = 10,000 years****100 millenniums (100 millenniums * 1000 years) = 100,000 years**

## Conclusion:

From the above calculation and formula, hope you understood how many years are there in a decade, century, and millennium. The above listed formula will help to count the number of years very easily for any number of decades, century, and millennium.

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