Duration Calculator
How to Use
- Select start and end date-times.
- Click Calculate to get the duration breakdown.
- Use Copy Result or Download JSON to save.
• Start must be earlier than end.
• Totals are computed from milliseconds difference.
FAQ
Are months and years always consistent?
Months/years are computed by calendar components; totals are based on exact milliseconds.
Does it support seconds?
Yes. The breakdown includes seconds and total seconds.
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