Free Tool
Date Difference Calculator
Calculate precise durations between two dates.
Timezone
Date A
Date A Input
Pick Date
Pick Time
Local (UTC)
09/11/2025 16:09:19 Z
UTC
09/11/2025 16:09:19 Z
Date B
Date B Input
Pick Date
Pick Time
Local (UTC)
09/11/2025 17:09:19 Z
UTC
09/11/2025 17:09:19 Z
Absolute difference
Signed: +1 hour
Human
1 hour
ISO 8601 Duration
PT1H
Years (approx)
0
Months (approx)
0
Weeks
0
Days
0
Hours
1
Minutes
60
Seconds
3600
Milliseconds
3600000
Business Mode
Region
Custom holidays (YYYY-MM-DD, one per line)
Business days (inclusive)
0
Weekend days skipped
1
Holidays skipped
0
Visual timeline
2025-11-09T16:09:19.524Z2025-11-09T17:09:19.524Z
A
09/11/2025 16:09:19 Z
B
09/11/2025 17:09:19 Z
One date per line. Differences show vs A and vs previous row.
| Input | Error | ISO | Local | Δ vs A | Δ vs prev |
|---|---|---|---|---|---|
| Results appear here… | |||||
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