Calculate elapsed calendar employment duration between dates, or add years, months and days to a start date. The end date is excluded; weekends and holidays are included.

Elapsed calendar time excludes the end date: the same date gives 0 days. Months use a clamped month-end anniversary. No weekends or holidays are excluded; benefit/service-credit rules may differ.


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Employment Duration Formula

The following formula gives elapsed calendar days, excluding the end date. The same start and end date gives 0 days. Calendar years/months use clamped month-end anniversaries; this tool does not determine paid service or benefit eligibility.

D = (E - S)

Variables:

  • D is the employment duration in days
  • E is the end date of employment
  • S is the start date of employment

What is Employment Duration?

Employment duration refers to the total length of time an individual has been employed at a particular job or with a specific employer. This duration is typically measured from the start date of employment to the end date of employment. Knowing the employment duration is important for various reasons, including calculating benefits, determining eligibility for certain programs, and assessing work experience.

How to Calculate Employment Duration?

The following steps outline how to calculate the Employment Duration.


  1. First, determine the start date of employment (S).
  2. Next, determine the end date of employment (E).
  3. Next, calculate the duration in days using the formula D = (E – S).
  4. Finally, calculate the Employment Duration.
  5. After inserting the values and calculating the result, check your answer with the calculator above.

Example Problem : 

For the example below, January 1, 2020 to January 1, 2021 is 1 calendar year and 366 elapsed days, because 2020 includes February 29. For end-date mode, years and months are added together first, clamping to the target monthโ€™s last day when necessary, then calendar days are added.

Start Date of Employment (S) = January 1, 2020

End Date of Employment (E) = January 1, 2021

Employment Duration Calculator screenshot