Time Duration Calculator
Calculate the exact duration between a start and end time.
Enter start and end times to see the duration.
About This Calculator
The Time Duration Calculator helps you find the exact duration between two times. Simply enter a start time and end time, and the calculator will show you the duration in hours, minutes, seconds, and total time units.
Perfect for calculating work hours, meeting durations, time tracking, or any scenario where you need to know the exact time difference between two points.
Formula & Calculation Method
Time Duration Calculation: The duration is calculated by finding the difference between end time and start time.
Duration = End Time - Start Time
If End Time < Start Time, End Time is treated as next day
The calculator handles times that span across midnight. If the end time is earlier than the start time, it assumes the end time is on the next day.
How to Use This Calculator
- Enter Start Time: Select or input the starting time using the time picker.
- Enter End Time: Select or input the ending time using the time picker.
- Calculate: Click "Calculate" to see the duration between the two times.
- View Results: See the duration broken down into hours, minutes, seconds, and total time units.
- Use Features: Copy or share your result, get AI explanations, or track time differences.
Frequently Asked Questions
Can I calculate durations that span midnight?
Yes! If the end time is earlier than the start time (e.g., start at 11 PM, end at 1 AM), the calculator assumes the end time is on the next day.
What time format is used?
The calculator uses 24-hour format (HH:MM:SS). You can enter times using the time picker or manually type in the format.
How precise are the calculations?
The calculator is precise down to the second. It calculates exact differences between the two times you enter.
Can I calculate durations longer than 24 hours?
Yes, durations can be longer than 24 hours. The calculator will show the total hours, minutes, and seconds regardless of length.
Calculator by
NumCalculators Editorial Team
Multi-disciplinary Expert Team