Calculation Type
Start Time
09:00:00
End Time
17:30:00
Duration Breakdown
0
Weeks
0
Days
8
Hours
30
Minutes
0
Seconds
All Conversions
| Unit | Value |
|---|---|
| Weeks | 0.0506 |
| Days | 0.3542 |
| Hours | 8.5000 |
| Minutes | 510.00 |
| Seconds | 30,600 |
Quick Reference
1 Hour
3,600 seconds
1 Day
86,400 seconds
1 Week
604,800 seconds
Work Day (8h)
28,800 seconds
Frequently Asked Questions
How do I calculate time between two times?
Convert both times to a common unit (seconds or minutes), then subtract the earlier from the later. For times crossing midnight, add 24 hours (86400 seconds) to the end time if it's smaller than the start time.
How many seconds are in an hour/day/week?
1 hour = 3,600 seconds (60 × 60). 1 day = 86,400 seconds (24 × 3,600). 1 week = 604,800 seconds (7 × 86,400). These conversions are useful for time calculations.
How do I add time durations?
Add each unit separately (hours + hours, minutes + minutes, etc.), then carry over: if minutes ≥ 60, subtract 60 and add 1 to hours. Same for seconds to minutes, hours to days.
What is the difference between elapsed time and duration?
Elapsed time is the actual time that has passed between two points. Duration is a length of time that may or may not be anchored to specific start/end points. Both are measured the same way.
How do I convert decimal hours to hours and minutes?
Multiply the decimal part by 60 to get minutes. Example: 2.75 hours = 2 hours + (0.75 × 60) minutes = 2 hours 45 minutes. For seconds, multiply the decimal minutes by 60.