Date Difference Calculator
Calculate the exact time duration between two dates in days, weeks, months, and years. Perfect for project planning, age calculation, and event counting.
Calculate Date Difference
Enter two dates to calculate the time duration between them
Date Difference Results
Select two dates
to see the difference
Time Duration
Detailed Breakdown
Time Breakdown
Additional Metrics
Timeline Visualization
Date Context & Information
Date Information
Common Use Cases
Understanding Date Calculations
Calendar Days
Counts every day between two dates, including weekends and holidays. Perfect for vacation planning and project timelines.
Business Days
Excludes weekends and typically holidays. Essential for project management, legal deadlines, and work-related calculations.
Age Calculation
Precise calculation of years, months, and days between dates. Accounts for leap years and varying month lengths.
Date Difference FAQs
How accurate is the date difference calculation?
Our calculator is highly accurate and accounts for leap years, varying month lengths, and daylight saving time changes. It uses precise JavaScript Date object calculations.
What's the difference between calendar days and business days?
Calendar days include every day (weekends and holidays), while business days typically exclude weekends and public holidays, representing actual working days.
How are months calculated in date differences?
Months are calculated based on the actual calendar months between dates, not fixed 30-day periods. This provides more accurate results for financial and age calculations.
Can I calculate age with this calculator?
Yes! Use the "Age" output format to get precise age calculations in years, months, and days. Perfect for birthdays, anniversaries, and legal age verification.
What time zone does the calculator use?
The calculator uses your local browser time zone. For precise calculations across different time zones, ensure both dates are entered in the same time zone context.