Days Between Two Dates Calculator
Want to know exactly how many days are between two dates? Our Days Between Two Dates Calculator gives you the answer in seconds.
Enter a start date and an end date, and the calculator will tell you the number of days between them. You can use it for planning trips, tracking projects, counting down to events, checking deadlines, or simply figuring out how much time has passed between two dates.
No need to count days manually or check a calendar.
How to Calculate Days Between Two Dates
Using the calculator is simple:
Choose the first date.
Choose the second date.
Click Calculate.
See the total number of days between the dates.
For example:
Start date: January 1, 2026
End date: January 31, 2026
There are 30 elapsed days between these two dates.
The calculator handles different month lengths and leap years automatically.
What Does the Days Between Dates Calculator Do?
This calculator finds the number of elapsed days between two calendar dates.
You can use it to calculate:
Days between two dates
Days from one date to another
Days since a past date
Days until a future date
Number of days in a date range
Days between important events
Duration between two dates
Simply enter the dates you’re interested in and let the calculator do the counting.
How Many Days Are Between Two Dates?
The answer depends on the two dates you enter.
For example:
January 1, 2026 → January 10, 2026
There are 9 elapsed days between the dates.
This is because the calculation measures the time that passes from the beginning date to the ending date.
If you are counting both the starting and ending dates as calendar days, the count would be 10 calendar days.
Elapsed Days vs. Inclusive Days
This distinction is important.
Suppose an event starts on June 1 and ends on June 5.
The elapsed difference is:
4 days
But if you count June 1, 2, 3, 4, and 5 as individual calendar days, the inclusive count is:
5 days
Our calculator uses the date difference between the two dates, while an inclusive count treats both dates as part of the total.
Days Between Two Dates Calculator for Past Dates
You can use the calculator to find out how many days have passed since an earlier date.
For example, you could calculate:
Days since your birthday
Days since a wedding
Days since you started a job
Days since a trip
Days since a major event
Days since the beginning of a project
Enter the past date and today’s date to find the elapsed number of days.
Days Until a Future Date
The calculator can also help you find how many days remain until a future event.
For example, you might want to know:
Days until your birthday
Days until a vacation
Days until a wedding
Days until a holiday
Days until a deadline
Days until a planned event
Enter today’s date as the starting date and your future date as the ending date.
You’ll immediately see how many days are left.
Does It Account for Leap Years?
Yes.
A leap year has 366 days instead of 365, because February has 29 days rather than 28.
This matters when your date range crosses February 29.
For example, if you’re calculating the number of days across a leap year, manually multiplying the number of years by 365 may give you an incorrect result.
A date-based calculator accounts for leap years when determining the actual number of days between the dates.
Days Between Two Dates Including Weekends
The standard calculation includes all calendar days, including:
Monday
Tuesday
Wednesday
Thursday
Friday
Saturday
Sunday
So if your two dates are 14 days apart, the result includes the weekends.
If you need to calculate business days only, excluding weekends and possibly holidays, you would need a business-day calculator instead.
Days Between Two Dates for Travel
Planning a vacation?
You can use the calculator to determine the number of days between your departure and return dates.
For example:
Departure: July 10, 2026
Return: July 20, 2026
The elapsed difference is:
10 days
This can help when planning vacation schedules, hotel stays, road trips, and other travel plans.
Remember that the number of nights you stay somewhere may be different from the number of calendar dates included in your trip.
Days Between Dates for Projects and Deadlines
The calculator can also be useful for work and school.
You can use it to determine how many days are available between:
Project start and completion
Assignment dates
Application deadlines
Contract dates
Work schedules
Launch dates
Milestones
Instead of manually counting the days on a calendar, enter the two dates and get the result instantly.
Days Between Birthdays
You can also use the calculator to find the number of days between two birthdays.
For example, if you’re comparing two people’s birthdays or checking the number of days until your next birthday, simply enter the relevant dates.
If you want to calculate the age gap between two people, however, an age difference calculator may be more appropriate because it can express the difference in years, months, and days.
Days Between Two Dates in Weeks
Once you know the total number of days, you can also understand the duration in weeks.
For example:
14 days = 2 weeks
28 days = 4 weeks
However, not every month or year contains an exact number of weeks, so calculating the difference directly from the dates gives you a more reliable result than estimating from months.
Days Between Two Dates in Months or Years
A date range can also span multiple months or years.
For example:
January 15, 2025 → January 15, 2026
The difference is:
365 days
But a different one-year period may contain 366 days if it includes February 29 during a leap year.
That’s why it’s better to calculate the actual dates rather than assuming every year contains exactly 365 days.
Frequently Asked Questions
How many days are between two dates?
It depends on the dates you enter. Enter both dates into the calculator to get the exact elapsed number of days.
Does the calculator count the start date?
The standard date difference measures the elapsed time between the two dates. If you need to count both the start and end dates, add one day to the elapsed result for an inclusive count.
Does the calculator include weekends?
Yes. The standard calculation includes every calendar day, including Saturdays and Sundays.
Does it include leap days?
Yes. February 29 is included when it falls within the selected date range.
How do I calculate days between two dates manually?
You can count the days in each month between the dates, accounting for different month lengths and leap years. For longer date ranges, using a calculator is much easier and reduces the chance of mistakes.
Can I calculate days between a past and future date?
Yes. Enter any two valid dates, whether they are both in the past, both in the future, or one is past and the other is future.
Can I calculate how many days are left until a date?
Yes. Use today’s date as the starting date and the future date as the ending date.
Can I use this to calculate business days?
The standard date difference includes weekends. If you need to exclude Saturdays, Sundays, and holidays, use a dedicated business-day calculator.
Is this calculator free?
Yes. You can use the calculator online to find the number of days between two dates without manually counting them.
Try the Days Between Two Dates Calculator
Whether you’re planning a trip, tracking a project, counting down to an event, or simply curious about two dates, you can get your answer without doing the calendar math yourself.
Enter your two dates above and find out exactly how many days are between them.