Free Date Difference Calculator
Calculate the difference between two dates instantly with this free online date difference calculator.
Use the tool below to enter a start date and an end date, then calculate the exact time between them in years, months and days. You can also see total days, total weeks, total months, total hours, weekdays and weekend days.
Enter two dates to calculate the difference.
What is a Date Difference Calculator?
A date difference calculator is an online tool that calculates the amount of time between two dates. It helps you find the exact difference in years, months and days without manually counting calendar days.
Instead of calculating dates by hand, you can enter two dates and instantly see the time between them.
This date calculator runs directly in your browser and processes the calculation locally.
What can you use a Date Difference Calculator tool for?
You can use this date difference calculator to calculate days between dates, measure the time between two events, count how long a project has lasted, check how many days remain until a deadline, calculate the length of a trip or compare two calendar dates.
The tool can show the exact difference in years, months and days, total days, total weeks, remaining days, total months completed, total hours, total minutes, weekdays and weekend days.
How to use the Date Difference Calculator
Step 1: Enter the start date
Choose the first date in the start date field.
Step 2: Enter the end date
Choose the second date in the end date field. You can also use today as the end date.
Step 3: Choose whether to include the end date
Enable the option to include the end date if you want the final day to be counted as part of the date range.
Step 4: Calculate the difference
Click the calculate button to see the difference between the two dates in multiple formats.
Date difference results
This date difference calculator can show:
- Difference in years, months and days
- Total days between dates
- Total weeks
- Remaining days after full weeks
- Total months completed
- Total hours
- Total minutes
- Number of weekdays
- Number of weekend days
- Start weekday
- End weekday
Include end date or exclude end date?
By default, the calculator measures the difference between two dates excluding the end date.
For example, the difference between January 1 and January 2 is usually 1 day.
If you enable “include end date”, the calculator counts both the start date and the end date as part of the date range. This is useful when calculating full date ranges such as trips, stays, events or inclusive periods.
Common use cases
For deadlines and planning
You can calculate how many days are left until a deadline, launch date, exam, delivery date or event.
For projects
Project managers and freelancers can calculate how long a project has lasted or how many days are between milestones.
For travel
Travelers can calculate the length of a trip, hotel stay or vacation period.
For personal events
You can calculate the time between birthdays, anniversaries, important dates or life events.
For work and schedules
The calculator can help estimate weekdays and weekend days between two dates.
Related tools
Is this Date Difference Calculator free?
Yes. This date difference calculator is completely free to use.
Are my dates stored?
No. Your dates are processed directly in your browser. They are not uploaded, saved or stored.
Can I calculate days between two dates?
Yes. The calculator shows the total number of days between the selected start date and end date.
Can I include the end date?
Yes. You can enable the include end date option to count the final date as part of the range.
Does it show years, months and days?
Yes. The calculator shows the exact calendar difference in years, months and days.
Does it show weeks?
Yes. The tool shows total weeks and remaining days.
Can it count weekdays and weekends?
Yes. The calculator estimates the number of weekdays and weekend days between the selected dates.
Can I use today as the end date?
Yes. You can use the today button to automatically set the end date to the current date.
Can I copy the result?
Yes. You can copy the full date difference result to your clipboard.
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