Free Tool
Date Difference Calculator
Calculate precise durations between two dates.
Timezone
Date A
Date A Input
Pick Date
Pick Time
Local (UTC)
10/12/2025 23:05:29 Z
UTC
10/12/2025 23:05:29 Z
Date B
Date B Input
Pick Date
Pick Time
Local (UTC)
11/12/2025 00:05:29 Z
UTC
11/12/2025 00:05:29 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)
1
Weekend days skipped
0
Holidays skipped
0
Visual timeline
2025-12-10T23:05:29.328Z2025-12-11T00:05:29.328Z
A
10/12/2025 23:05:29 Z
B
11/12/2025 00:05:29 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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