Time Duration Calculator
Calculate hours, minutes, and seconds between two clock times, including overnight intervals.
Advertisement Space
How to Use the Time Duration Calculator
Enter the required values in the fields above and click Calculate. All calculations are executed directly inside your web browser using proven mathematical formulas, ensuring instantaneous results and 100% privacy without transmitting your numbers to remote servers.
Mathematical Formula
Duration = End Time (sec) - Start Time (sec); if End < Start, add 24 hours (86,400 sec).
Worked Example
From 08:30 to 17:15 is 8 hours and 45 minutes (8.75 decimal hours).
Important Notes & Limitations
Calculates durations within a 24-hour cycle.
Frequently Asked Questions
Yes, if the end time is earlier than the start time, the calculator automatically accounts for crossing into the next day.