Free Time Duration Calculator - Elapsed Time Made Easy
Calculate the duration between two times or dates. Find how long events last, measure elapsed time, and track intervals precisely.
Quick Answer
Duration = end time - start time. Example: 9:00 AM to 4:30 PM = 7 hours 30 minutes = 7.5 hours.
Key Facts about Time Duration Calculator:
- Duration = end - start
- Add 24 for overnight spans
- 1 hour = 60 minutes = 3600 seconds
- Express as decimal: 7:30 = 7.5 hours
- Use same format (24-hr recommended)
Why Use Our Time Duration Calculator?
Complete duration calculations:
Elapsed Time
Time between points.
Overnight
Handle midnight crossing.
Multiple Units
Hours, minutes, seconds.
Decimal Output
7:30 as 7.5 hours.
Instant Results
Get duration immediately.
100% Private
Your data stays private.
How to Time Duration Calculator in 3 Easy Steps
Calculate duration:
Enter Start
Start time or date.
Enter End
End time or date.
Get Duration
See elapsed time.
Track Elapsed Time
Precise duration
Multiple formats
Overnight handling
Easy conversion
Common Use Cases for Time Duration Calculator
Perfect for:
Frequently Asked Questions
Everything you need to know about our time duration calculator
How do I calculate duration between two times?
End time - start time = duration
Subtract start from end. 9:15 AM to 2:45 PM: convert to same format if needed, then subtract = 5 hours 30 minutes.
How do I handle times crossing midnight?
Add 24 hours to end time: (24+2) - 22 = 4 hours
Add 24 hours to the end time if needed. 10:00 PM to 2:00 AM: (24+2) - 22 = 4 hours. Or calculate to midnight, then from midnight.
How do I express duration in different units?
5:30 = 5.5 hours = 330 minutes = 19,800 seconds
5 hours 30 minutes = 5.5 hours = 330 minutes = 19,800 seconds. Convert by multiplying or dividing by 60 as needed.
Still have questions? Try the tool yourself!
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