Date Duration Calculator
Find exactly how many days, weeks, and years lie between two dates.
How Dates Are Counted
By default, this calculator counts the number of nights or gaps between two dates — the way you'd count hotel nights, not calendar days touched. If you want to include both the start and end date in the count (useful for "how many days does this event span"), tick the inclusive option.
Common Uses
- Age calculation in exact years, months, and days
- Countdown to an event or deadline
- Project or leave duration
- Contract or subscription period length