Days Between Dates Calculator
Instantly calculate the number of days between two dates
Calculate Duration
Use keyboard: Enter to calculate, Escape to clear
Tutorials & Guides
Days Between Dates Guide
Understanding Date Differences
Calculating days between dates helps determine the exact duration between two points in time.
Calculation Method:
Convert both dates to Unix timestamps (milliseconds since 1970)
Calculate absolute difference between timestamps
Convert milliseconds to days (divide by 86,400,000)
Round up to include both start and end dates
How to Use:
1. Enter start date
2. Enter end date
3. Press Enter or click Calculate Days
4. Get exact number of days between dates
Practical Applications
Project Management:
Calculate project durations
Track milestone deadlines
Monitor progress against timelines
Legal and Business:
Contract period calculations
Lease and rental agreements
Warranty period tracking
Personal Planning:
Vacation planning
Event countdowns
Fitness challenge tracking