โฑ๏ธ Time Duration Calculator
Free Time Duration Calculator โ Calculate Hours Between Times
Our free Time Duration Calculator makes it easy to find the exact duration between any two times or dates. Whether you're calculating work hours, tracking project time, measuring intervals, or planning schedules โ this tool gives you instant, precise results.
Two Modes Available
- Time Mode: Calculate the duration between two times on the same day (e.g., 9:00 AM to 5:30 PM = 8 hours 30 minutes).
- Date & Time Mode: Calculate duration spanning multiple days. Perfect for project tracking, travel duration, or event planning.
Example Calculations
Work hours: Start 9:00, End 17:30 โ Duration: 8 hours 30 minutes
Project span: Jan 1 09:00 to Jan 15 18:00 โ Duration: 14 days, 9 hours
Who Uses This Tool?
- Freelancers billing by the hour
- HR professionals calculating work hours
- Students tracking study sessions
- Travelers calculating flight or journey durations
- Event planners scheduling timelines
Also try: Age Calculator, Speed Calculator.
Frequently Asked Questions
In Time Mode, if the end time is earlier than the start time, the calculator assumes the end time is on the next day. For example, start 10:00 PM and end 2:00 AM = 4 hours duration.
Yes! Use Date & Time Mode to enter a specific start and end date and time. This allows you to calculate duration spanning days, weeks, or even months.
The calculator uses JavaScript's Date object, which is accurate to the millisecond. Results are precise to the second.