Tool
Date Difference Calculator
Find days and hours between two dates.
Time & Date Tools
What this tool does
Measure elapsed time between a start date and end date in days and hours.
How to use
- Enter start date.
- Enter end date.
- View elapsed days and hours.
Formula
duration = end date − start date
Examples
Jan 1 to Jan 31
Input: 2026-01-01 to 2026-01-31
Output: 30 days
Calendar day difference between dates.
Common use cases
- Calculate project duration
- Track days until deadline
- Measure rental or trial periods
FAQ
Are start and end dates inclusive?
Duration is the difference between the two dates.
Does it include time of day?
If times are provided, hours are included in the result.
Can end date be before start?
Yes. Results show elapsed time in the forward direction.
Related tools
Last reviewed: 2026-05-23