## Using our year calculators

We built the year calculator to help quickly solve for counting years forward, backward, and between two
dates. These are three separate calculations, and here’s how you'd use each:

- Choose the type of calculation you need: There are many ways to calculate dates by years.
**Subtract Years** is used for finding a date before the date you choose. For
example: 3 years before 2024. This calculation will return 2021.
**Years Between Dates** will give you the specific number of years when
choosing two dates. For example: Years between 2015 and 2024. This calculation will return 9
years.
**Add Years** counts forward from a specific date you choose. For example: 5
Years from 2019 will give you 2024.

**Input your date & timeline**: We've made it so it won't fully calculate until you
fill both dates. Please contact us if you find a bug.
**Evaluate your answer**: Make sure the result makes sense for your query.
Additionally, you can find other calculators we've built for finding years before today, years from
today, years until a specific date, and years from a specific date. These will bring you directly to
specific date calculators.

## How to calculate the number of years between two dates

Starting a year calculation manually involves marking the start and end dates. The fastest way to
do this would be to use a calculator or a formula if you're using Excel or Google Sheets. Here
are the steps you'd follow:

- Mark the start and end dates: Always write it down to help with the next step.
- Calculate the difference in years directly between your start and end dates.
- Consider adjusting for leap years if necessary, depending on the precision required for your
calculation.

### Tips when calculating year values

- Account for leap years when calculating years between dates to ensure accuracy.
- Remember to adjust your calculation if the start and end dates do not cover full
years.

## How to subtract years from a date

Subtracting years from a date involves understanding the calendar specifics, such as leap years.
Here’s a straightforward approach:

- Identify the start date and the number of years you want to subtract.
- Simply subtract the years to find your new date, considering leap years if necessary.

### Tips when subtracting years

- Be mindful of leap years, especially if your calculation spans February 29.
- Subtracting a year directly adjusts the date to the same day and month of the previous
year, unless it lands on a leap day.

## How to add years to a date

Adding years to a date follows a similar process as subtracting, but with future dates in mind.
Here’s how:

- Determine the start date and the number of years you want to add.
- Add the years to your start date, keeping an eye out for leap years if they fall within your
calculation range.

### Tips when adding years

- Remember to account for leap years, which might affect your calculation if February 29
is involved.
- Adding years will maintain the same day and month for the new date, except when crossing
over a leap day.