Years Calculator: Add, Subtract, Between Dates

Use this year calculator to find a date by adding or subtracting years, or find the total number of years, months, and days between two dates.

1 year
There is 1 year from July 4, 2025 to July 4, 2026.

How to Use the Years Calculator

  1. Select Operation: Choose Add Years, Subtract Years, or Years Between using the radio buttons at the top. By default, it is selected to "Years Between".
  2. Enter Values:
    • For Years Between: Select a Start Date and an End Date. The calculator will show you the total years, months, and days. The initial result is 1 year between the default dates.
    • For Add Years: Select a starting "Date" and enter the number of "Years" to add. The calculator will show the future date.
    • For Subtract Years: Select a starting "Date" and enter the number of "Years" to subtract. The calculator will show the past date.
  3. Dates: All date fields are editable; click on them and use the date picker or type a date in `YYYY-MM-DD` format.
  4. Calculate: Click the "Calculate" button to perform the calculation and see the results.
  5. Results:
    • The main result (e.g., "X years, Y months, Z days" or a specific date) is displayed in a large font.
    • The descriptive sentence below provides more context about the calculation.
  6. Clear Button: Click "Clear" to reset all input fields and the result display to the default "Years Between" calculation.

Note: The maximum number of years for addition or subtraction is 200. The calculations correctly account for different lengths of months and leap years.

Years Between Dates Calculation:

To calculate the duration in years, months, and days between two dates:

  1. Date: Select start date and the target date. The year calculation will be based on the start to the later date.
  2. Full Years: Count the number of full years between the two dates. For example, from January 15, 2020 to January 15, 2022 is exactly 2 years.
  3. Full Months: After calculating the full years, then remaining in the period after year will be months.
  4. Remaining Days: After year and month calculation, the remaining is counted in days.

Example: To find the duration between October 20, 2021 and March 10, 2024:

So, the total duration is 2 years, 4 months, and 19 days.