Time Calculator Online | Date Interval & Duration Tool
Calculate time intervals, date differences, and perform time arithmetic. Add or subtract days, hours, minutes with support for business days.
Date Interval Calculator
Start Date
End Date
Total Days
Working Days
Weeks
Please select start and end dates
Time Arithmetic
Base Date
Years
Months
Weeks
Days
Hours
Minutes
Seconds
Years
Months
Weeks
Days
Hours
Minutes
Seconds
Result
Date Time
Timestamp
Instructions and Related Knowledge
Date Interval Calculation
- Calculate intervals between two dates, including years, months, days, weeks, and working days
- Option to include or exclude end date, affecting the final calculation
- Working days calculation excludes Saturdays and Sundays by default
- Detailed results show specific distribution of years, months, and days
Time Arithmetic
- Supports addition and subtraction of date/time including years, months, weeks, days, hours, minutes, seconds
- Negative numbers can be used for backward time calculation
- Month calculations automatically handle differences in days between months
- Supports viewing results in timestamp format