How to use the date difference calculator
This date difference calculator finds how much time lies between two calendar dates. Choose the first date and the second date using the date pickers, then click "Calculate difference" to see the result in years, months, and days, plus the total number of days. The difference is always shown as a positive value (the absolute span between the two dates), so it does not matter which date you enter first. The tool also shows the span in total hours and minutes for reference.
Calculating the gap between two dates is useful in many situations. You might need to know how many days until a deadline, how long you have lived in a place, how many days are between two events, or how old something is in years and days. Project planners use it for timelines; HR and payroll for tenure or leave; and anyone for anniversaries, contracts, or subscriptions. The calculator uses the same calendar we use every day, so leap years and different month lengths are reflected in the total days count. The breakdown into years, months, and days uses approximate month length (30 days) for simplicity, while the total days is exact.
The calculator runs entirely in your browser. There is no sign-up, no download, and no delay. It is designed to be mobile-friendly: the two-column layout stacks on small screens, date inputs are easy to tap, and the result appears next to your selection so you can compare at a glance. Use it for quick checks or for planning—whether you need the difference in days only or in years, months, and days.
Bookmark this page for quick access whenever you need to find the time between two dates. This free date difference calculator provides fast, clear results on any device.