Date Difference Calculator

Calculate exact days, weeks, months, and years between two dates

Precise Date Calculator
Select Dates
Start Date
End Date
Includes both start and end dates in calculation. Results update in real-time.
Date Difference Results
Detailed Breakdown
Time Units
Business Days (Mon-Fri)
Age / Duration Format
0 years, 0 months, 0 days
Exact duration between selected dates
Quick Date Presets
Exact Calculation
Precise day counting including leap years and month variations
Business Days
Calculate working days excluding weekends (Mon-Fri)
Multiple Formats
Days, weeks, months, years, and age-style formatting

Frequently Asked Questions

How does the date difference calculator work?
The calculator counts the exact number of days between two dates. It accounts for leap years, different month lengths, and provides results in days, weeks, months, years, and business days.
Does it include both start and end dates?
Yes, the calculation includes both the start and end dates. For example, from Jan 1 to Jan 2 is 2 days total.
What are business days?
Business days are Monday through Friday (weekdays). Saturday and Sunday are excluded from the count. Perfect for project planning and work deadlines.
Can I calculate my age with this?
Absolutely! Select your birth date as start date and today's date as end date to see your exact age in years, months, and days.
Does it account for leap years?
Yes, the calculator automatically accounts for leap years (February 29) in all calculations.
Is this calculator free?
100% free! No registration, no hidden costs. Use it for personal or professional purposes.
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Date Difference Calculator - Calculate Days Between Dates

Our Date Difference Calculator helps you calculate the exact number of days, weeks, months, and years between any two dates. Perfect for age calculation, project planning, milestone tracking, and countdown timers.

How it works: Simply select a start date and end date. The calculator instantly shows you the difference in days, weeks, months, years, and business days. The calculation includes both selected dates and accounts for leap years.

Common uses: Calculate your exact age, days until an event, project duration, work days between dates, pregnancy due dates, and anniversary tracking.

Features: Exact day counting, business days (Mon-Fri), age-style formatting (years, months, days), weeks conversion, and real-time updates.