Date Calculator

Calculate the duration between two dates or add and subtract time from any date. Results shown in days, weeks, months, and years.

Start Date

End Date

Include end dateShow business days (exclude weekends)

Duration

0days

0weeks

0months

0years

0 days = 0 weeks and 0 days

How to Use the Date Calculator

Duration Between Dates: Select a start and end date to see the difference in days, weeks, months, and years. Toggle "Include end date" to count the end date itself.
Add / Subtract: Pick a start date, choose to add or subtract, enter an amount, and select the unit (days, weeks, months, or years) to see the resulting date.
Business Days: In the duration mode, check "Show business days" to see the count excluding weekends.
Share Results: Use the "Copy link" button to share a URL that preserves your calculation for others to view.