Easy Digital Tools logo Date CalculatorFree online date calculator
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Date Calculator 📅

Count days between two dates, or add and subtract days, months and years from a chosen date.

Days between datesAdd or subtract datesInstant calendar math

Days between two dates

Difference
0 days
Same date

Add or subtract days

New date
—
Use a negative number to subtract days.

Add or subtract months

New date
—
Use a negative number to subtract months.

Add or subtract years

New date
—
Use a negative number to subtract years.

What this date calculator does

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.

Days between dates

This is useful for deadlines, travel plans, subscriptions, project timelines, birthdays, age checks and many other everyday date calculations.

Add or subtract from a date

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.

Date Calculator FAQ

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.

Can I add or subtract days from a date?

Yes. Select a starting date and enter a positive number to add days or a negative number to subtract them.

Can I add months or years to a date?

Yes. Use the dedicated months or years calculation to shift the chosen date by the requested amount.

How does adding months handle different month lengths?

When the destination month has fewer days than the starting month, the result uses the last valid day of the destination month.

Can this calculator count leap years?

Yes. The date arithmetic accounts for leap days, including February 29 in leap years.

Does the date calculator require registration?

No. The calculator works directly in your browser without registration and updates results as you change the dates.