Calculate time duration
Calculate elapsed time between two unambiguous timestamp instants.
Input & settings
How to use this tool
Provide exact UTC offsets for both instants. The difference is end minus start, including offset changes.
Limits and behavior
Enter YYYY-MM-DDTHH:MM:SS with optional 1–3 fractional second digits and mandatory Z or ±HH:MM. Offset range is ±14:00. Local calendar years are 1900–2100. Invalid dates and leap seconds are rejected. Returned days are elapsed 24-hour periods. Negative durations are supported. Input is limited to 1 MB and output to 3 MB. No input content is saved by CraftAI.
Measure elapsed hours, minutes and seconds
Provide two precise timestamps to determine actual elapsed time between them.
Why can elapsed time differ from clock-face time?
Daylight saving and time zone offsets can change elapsed time across local-clock transitions.
Related tools: convert time zones with dst · calculate difference between dates