Time Duration Calculator
Calculate the duration between two elapsed times or clock times with precision
Calculate Time Duration
Elapsed Time Duration: Calculate the duration between two time values. Example: Duration from 2h 30m to 4h 15m = 1h 45m
Elapsed Duration Result
Example Calculations
Elapsed Time Example
Start time: 2 hours 30 minutes 15 seconds
End time: 4 hours 15 minutes 45 seconds
Duration: 1 hour 45 minutes 30 seconds
Perfect for measuring activity durations
Clock Time Example (Same Day)
Start time: 1:47 PM (13:47:00)
End time: 4:55 PM (16:55:00)
Duration: 3 hours 8 minutes
Clock Time Example (Overnight)
Start time: 11:30 PM (23:30:00)
End time: 7:15 AM (07:15:00)
Duration: 7 hours 45 minutes
Automatically handles overnight calculations
Calculator Guide
Elapsed Time Calculator
- • Enter any two time values
- • No restrictions on format
- • Perfect for durations and intervals
- • Example: Movie runtime, race times
Clock Time Calculator
- • Use actual clock times
- • Supports 12-hour and 24-hour format
- • Handles overnight periods
- • Example: Work shifts, appointments
Time Conversion Reference
Calculation Tips
End time must be later than start time for elapsed calculations
Clock time calculator automatically handles overnight periods
Use 24-hour format to avoid AM/PM confusion
Results can be displayed in multiple time units
Perfect for timing activities, shifts, and events
Understanding Time Duration Calculations
What is Time Duration?
Time duration is the length of time that passes between two moments. It's the answer to "how long did this take?" or "how much time elapsed?" Duration is always a positive value and represents the interval between a start and end point.
Types of Duration Calculations
Elapsed Time Duration
Measures the duration between two time values without considering specific clock times. Useful for activities, processes, and performance measurements.
Clock Time Duration
Calculates the actual time that passes between two specific times of day. Handles both same-day and overnight periods automatically.
Manual Calculation Method
Basic Subtraction Method:
- 1. Convert both times to the same format (seconds)
- 2. Subtract start time from end time
- 3. Convert result back to desired format
- 4. Handle borrowing for negative components
Common Applications
- •Work shift duration and overtime calculations
- •Sports timing and performance analysis
- •Event planning and scheduling
- •Project time tracking and billing
- •Travel time and transportation planning