Time Duration Calculator
Calculate elapsed time duration in hours, minutes, and seconds between start and end times.
How to Use Time Duration Calculator
- Enter your Start Time in 24-hour HH:MM format (e.g. 09:00 or 21:30).
- Enter your End Time in 24-hour HH:MM format (e.g. 17:30 or 06:00).
- Click 'Calculate Time Duration' to compute elapsed time.
- View formatted hours/minutes, decimal hours for billing, and copy results.
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Frequently Asked Questions
How do you calculate elapsed time duration between two timestamps?
The calculator converts both start and end timestamps into total elapsed minutes from midnight: Minutes = (Hours × 60) + Minutes. Subtracting start minutes from end minutes yields total elapsed minutes, which is then formatted into hours, minutes, and seconds.
How does this calculator handle overnight shifts crossing midnight?
If the end time is numerically earlier than the start time (for instance, starting at 22:00 and finishing at 06:30 the next morning), the engine automatically adds 24 hours (1,440 minutes) to the end time to calculate the exact overnight work duration.
What are decimal hours and why are they used for payroll?
Decimal hours express minutes as mathematical hundredths of an hour (e.g., 8 hours and 15 minutes = 8.25 hours, 7 hours and 30 minutes = 7.50 hours). Timesheet software and payroll processors require decimal hours to multiply by hourly wage rates.
How do you convert minutes into decimal fractions of an hour?
Divide the minute count by 60. For example: 12 minutes / 60 = 0.20 hours, 15 minutes / 60 = 0.25 hours, 30 minutes / 60 = 0.50 hours, and 45 minutes / 60 = 0.75 hours.