Time Calculator
Add or subtract time durations
Result
00:00:00
0 seconds
Quick Reference
- • 1 hour = 60 minutes = 3,600 seconds
- • 1 day = 24 hours = 86,400 seconds
- • Negative results shown when subtracting larger from smaller
Frequently Asked Questions
How do I add hours, minutes, and seconds together?
Enter the first time value and the second time value in hours, minutes, and seconds fields, then select the Add mode. The calculator handles all carry-over automatically, so 45 minutes plus 30 minutes correctly shows as 1 hour and 15 minutes.
Can I subtract a larger time from a smaller time?
Yes, the calculator handles this gracefully. When the second time value is larger than the first, the result will be displayed as a negative duration, indicating the time difference in the opposite direction.
How do I calculate total work hours for a week?
Add each day's work duration one at a time. Enter your first day's hours, then add the second day's hours to the result, and continue for each working day. This gives you the total hours worked across the entire week.
What time format does this calculator use?
The calculator uses the HH:MM:SS (hours, minutes, seconds) format. Hours are not limited to 24, so results like 36 hours and 15 minutes are displayed correctly for duration calculations that span multiple days.
Can I use this calculator for payroll time tracking?
Yes, this calculator is useful for adding up employee work hours, break times, and overtime. Subtract break durations from total shift time to get net working hours, which can then be multiplied by the hourly rate for payroll purposes.