# How Long is a Decade? – How Many Years in a Decade?

**A decade is 10 years long.**

## How many years is a decade?

Decade refers to a period of time that spans 10 years.

- One decade is equal to 10 years.
- Two decades is 20 years.
- Three decades is 30 years.
- And so on.

## How long is a decade in months?

**A decade is 120 months long. **

There are 12 months in a year, and a decade is 10 years long, so 12 x 10 = 120.

## How long is a decade in weeks?

**A decade is 522 weeks long. **

There are 52,14-52.29 weeks in a year (depending on whether it’s a leap year or not), so it’s a better idea to calculate the weeks using the days:

- average of 365.2425 days in a year
- decade is 10 years
- there are 7 days a week.

So 365.2425 x 10 / 7 = 521.77

It can vary slightly depending on leap years and the specific number of days a year, but there are approximately 522 weeks in a decade on average.

## How long is a decade in days?

**A decade is approximately 3,652 days long. **

According to the Gregorian calendar, a year spans approximately 365.2425 days.

Depending on the year, there are 365 days in a year (average year) and 366 days in each leap year.

Consequently, a decade lasts approximately 3,652.425 days. (10 x 365.2425 days).

## How long is a decade in hours?

**There are about 87,658 hours in a decade. **

A day has 24 hours, and a year has approx. 365,2425 days. Therefore, a decade will have 10 (years) x 365.2425 (days in a year) x 24 (hours in a day) = 87,658.2 hours.

## How long is a decade in minutes?

**There are about 5,259,492 minutes in a decade. **

An hour has 60 minutes, and a day has 24 hours, and there are approx. 365.2425 days in a year. So a decade will have 10 (years) x 365.2425 (days in a year) x 24 (hours in a day) x 60 (minutes in an hour) = 5,259,492 minutes

## How many decades is a century?

**There are 10 decades in a century. **

A century is 100 years long and a decade is 10 years long. So there are 10 decades in a century.

**Related post:** How Long is a Century? – How Many Years in a Century?

## How many decades is a millennium?

**There are 100 decades in a millennium. **

A millennium is 1000 years long and a decade is 10 years long. So there are 100 decades in a millennium.

**Related post:** How Long is a Millennium? – How Many Years in a Millennium?

## Where does the word decade originate from?

The word “decade” comes from the Greek word “deká” which means “ten”. It first appeared in English in the late 15th century but has been used to refer to ten years since ancient times.

## When is the term “decade” used?

This term is widely used and can be seen in various contexts such as history, economics, and personal milestones.

To use decade to refer to specific periods, we can use ordinal numbers such as “the first decade of the 21st century” or “the third decade of the 1900s”.

## Fun facts about decades

- The term “decade” can also refer to a group or series of ten.
- A “decennial” refers to an event that happens once every 10 years, such as a census or anniversary.
- In Roman numerals, a decade is represented by the letter X.
- The word “decade” comes from the Greek “deka,” meaning ten.
- The 1970s were known as the “Me Decade” due to the rise of self-help books and movements promoting individualism.

## Why knowing about decades is important

Knowing how long a decade is and how to calculate it can be helpful in various situations.

For example, understanding how many years are included in a decade can give context and help organize information when looking at historical events or planning for the future.

It can also be helpful for personal goal setting, such as setting long-term goals every 10 years.

Additionally, understanding the concept of decades is essential in fields like economics and business, where analyzing data over some time can provide valuable insights.

Knowing about decades and their length can enrich our understanding of time and its impact on different aspects of life.