Time Difference Calculator
Enter a start and end timestamp to see the elapsed (or remaining) time across multiple units with a clear breakdown.
Start: Tuesday, November 25, 2025 at 07:50:00 AM
End: Tuesday, November 25, 2025 at 11:50:00 AM
Total duration (decimal)
- 14,400 seconds
- 240 minutes
- 4 hours
- 0.166667 days
Breakdown (sign indicates direction)
0 day(s), 4 hour(s), 0 minute(s), 0 second(s)
How to Use This Calculator
Provide start and end timestamps
Use the date/time pickers to capture precise local moments—past or future.
Check the results
Review total duration across seconds, minutes, hours, and days plus a signed breakdown.
Apply to your scenario
Use results for scheduling, time tracking, countdowns, or monitoring project timelines.
Formula
Difference (ms) = End Timestamp − Start Timestamp
Seconds = Difference ÷ 1,000
Minutes = Seconds ÷ 60
Hours = Minutes ÷ 60
Days = Hours ÷ 24
Example: 2025-11-09 12:00 − 2025-11-08 08:30 = 1 day, 3 hours, 30 minutes = 99,000 seconds.
Usage Ideas
- Measure travel or shipping durations while accounting for time zones manually.
- Determine time remaining until deadlines or events.
- Track elapsed time between logs in incident management.
- Calculate aging of data, certificates, or backups.
Frequently Asked Questions
Does this handle different time zones?
The inputs use your local time zone. Convert to UTC manually if you’re comparing cross-zone events.
Can I enter seconds?
Yes—use the datetime-local field’s seconds picker (or type :SS). Fractions are truncated to seconds.
What if the difference is negative?
A negative result means the end time precedes the start time. Use the absolute difference when necessary.
Does daylight saving affect results?
Yes—the browser applies local DST rules automatically when converting to timestamps.