How can I calculate the days between two dates?
Select the start and end dates in the first calculator. The result shows the number of days between them using calendar date arithmetic.
Count days between two dates, or add and subtract days, months and years from a chosen date.
This online date calculator helps with common date math. You can find the number of days between two dates or calculate a new date by adding or subtracting days, months or years.
This is useful for deadlines, travel plans, subscriptions, project timelines, birthdays, age checks and many other everyday date calculations.
You can move forward or backward from any date by entering positive or negative values. This makes it easy to calculate future dates and past dates without doing the math manually.
Select the start and end dates in the first calculator. The result shows the number of days between them using calendar date arithmetic.
Yes. Select a starting date and enter a positive number to add days or a negative number to subtract them.
Yes. Use the dedicated months or years calculation to shift the chosen date by the requested amount.
When the destination month has fewer days than the starting month, the result uses the last valid day of the destination month.
Yes. The date arithmetic accounts for leap days, including February 29 in leap years.
No. The calculator works directly in your browser without registration and updates results as you change the dates.