Free Tool
Date Difference Calculator
Calculate precise durations between two dates.
Timezone
Date A
Date A Input
Pick Date
Pick Time
Local (UTC)
27/04/2026 11:18:04 Z
UTC
27/04/2026 11:18:04 Z
Date B
Date B Input
Pick Date
Pick Time
Local (UTC)
27/04/2026 12:18:04 Z
UTC
27/04/2026 12:18:04 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
2026-04-27T11:18:04.903Z2026-04-27T12:18:04.903Z
A
27/04/2026 11:18:04 Z
B
27/04/2026 12:18:04 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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