Date Calculator

Calculate the duration between two dates or add/subtract days from a specific date. Perfect for planning projects, calculating age, or determining important deadlines.

Start Date

End 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
Calculate maturity dates for investments
Determine pregnancy due dates
Calculate service periods and employment duration

Features

Calculate precise duration between any two dates
Add or subtract days from any date
Display results in years, months, and days
Show total number of days between dates
Easy-to-use interface with instant calculations
Mobile-friendly design