Relationship Duration Calculator
Calculate how long you've been in a relationship.
How to Do It Manually
Calculate how long a relationship has lasted by finding the difference between start and end dates (or today).
Duration = end date − start date (in years, months, days)
- Enter the relationship start date.
- Enter the end date (or select 'ongoing' for today).
- Calculate the difference in years, months, and days.
Frequently Asked Questions
How do I mark an anniversary?
The anniversary is the same month/day, one year later. Calculate from the original start date.