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Date Calculator

Calculate Date Differences & Add or Subtract Days

Calculate the exact difference between two dates or find a new date by adding or subtracting days.

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Date Difference

Find the number of days between two dates.

Start Date

End Date

Your date difference will appear here

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Add or Subtract Days

Find a future or previous date quickly.

Starting Date

Number of Days

Your calculated date will appear here

What is a Date Calculator?

A date calculator helps you find the difference between two dates or calculate a new date by adding or subtracting a specific number of days.

How to Calculate Date Difference

Select a start date and an end date, then click Calculate Difference. The calculator shows the total number of days as well as the difference in years, months, and days.

Example

From January 1, 2026 to January 10, 2026 is 9 days apart.

How to Add or Subtract Days

Select a starting date, enter the number of days, and choose Add Days or Subtract Days. The calculator will show the resulting date.

Example

Adding 30 days to January 1, 2026 gives January 31, 2026.

Note: Date calculations use calendar dates and account for different month lengths and leap years.

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