Calculate the duration between two dates or add/subtract days from a specific date. Perfect for planning projects, calculating age, or determining important deadlines.
Duration
Result Date
How to Use the Date Calculator
This date calculator offers two powerful modes:
Duration Between Dates
Select a start date and an end date
Click "Calculate Duration" to see the difference
Results show years, months, days, and total days
Add/Subtract Days
Choose a base date
Select whether to add or subtract days
Enter the number of days
Click "Calculate Date" to see the result
Common Use Cases
Calculate age in years, months, and days
Determine project timelines and deadlines
Plan events and calculate days until special occasions