Date Difference Calculator: Days Between Two Dates
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Other Tools
Find the Time Between Two Dates
Need to know exactly how much time is between two dates? This free tool calculates the difference between two dates easily. Just pick a start date and an end date, and it will give you the answer in years, months, and days. It also shows the total weeks and days.
You can use this to count the days for a project timeline, a work deadline, or a travel trip. It is also great for finding out how much time has passed since a special event. To count down the days to a single event, try our Days Until Calculator.
Counting the End Date
Sometimes you want to include the very last day in your count. For example, if you book a hotel from the 1st to the 3rd, that is 3 full days. Just check the box that says "Include the end date" before you click calculate, and we will add that extra day for you.
Find the Age Difference Between Two People
Want to know exactly how much older someone is? Enter the older person's birth date in the "From" box, and the younger person's birth date in the "To" box. The tool will show you the exact age gap in years, months, and days. To find your own age, check out our Age Calculator.
FAQs
How do I calculate the number of days between two dates?
Enter the start date and the end date in the calculator above and press "Calculate". The result shows the exact duration between them in years, months, and days, plus the total number of days and weeks in the date range.
Does the calculator include the end date in the count?
By default the end date is not counted. Tick the "Include the end date" checkbox to add one day — useful for deadlines, bookings, and inclusive date ranges.
Can I use it as a date duration calculator for work or projects?
Yes. It works for any date range: project timelines, rental periods, subscription lengths, pregnancy duration, or the time between two events — past or future.