When to use this tool
- Measure SLA windows.
- Count days between release milestones.
- Compare exact elapsed seconds between incidents.
Date math
Date difference calculator
Compare two dates and get calendar days, business days, precise seconds, and a readable duration.
Calendar days
1
Business days
0
Hours
24.00
Minutes
1440
Seconds
86400
Human
1 day
Date Difference Calculator: definition and examples
A date difference is the elapsed time between two calendar or timestamp values.
How to use it
- Enter the start date and time.
- Enter the end date and time.
- Copy the calendar, business-day, or exact duration result.
Example
From Monday 09:00 to Friday 17:00 is four calendar days plus eight hours.
Frequently asked questions
Are holidays excluded from business days?
No. Business-day counts exclude Saturdays and Sundays only.
Can the result be negative?
Yes. If the end date is before the start date, exact duration values can be negative.