Time between 9:03 AM and 5:00 PM is 7 hours and 57 minutes. That's 477 total minutes, or 7.95 decimal hours. For date math that crosses midnight, use our hour calculator with full date support.
Common time differences
| From | To | Hours | Common use |
|---|---|---|---|
| 9:00 AM | 5:00 PM | 8:00 | Standard US workday |
| 9:00 AM | 6:00 PM | 9:00 | Extended workday |
| 8:00 AM | 4:00 PM | 8:00 | Standard with 8-hour shift |
| 7:00 AM | 3:00 PM | 8:00 | School day |
| 10:00 PM | 7:00 AM | 9:00 | Sleep duration (9 hours) |
| 11:00 PM | 7:00 AM | 8:00 | Sleep duration (8 hours) |
| 10:00 PM | 6:00 AM | 8:00 | Sleep duration (8 hours) |
💡 Did you know? The standard US workweek of 40 hours was established by the Fair Labor Standards Act in 1938. Before that, US workers often labored 10-16 hours per day, 6 days a week. Henry Ford's 5-day, 40-hour workweek (adopted in 1926) was a major innovation.
Frequently Asked Questions
There are 7 hours and 57 minutes between 9:03 AM and 5:00 PM. That's 477 total minutes, or 7.95 decimal hours.
Convert both times to 24-hour format, then subtract. If the result is negative, add 24 hours (or assume the end is the next day). Our calculator handles this automatically.
9 AM to 5 PM = 8 hours. This is the standard US workday. With a 1-hour lunch break, working time is 7 hours.
In Excel: =MOD(end_time - start_time, 1) * 24 gives decimal hours worked. For HH:MM format: =TEXT(MOD(end_time - start_time, 1), "h:mm"). For time that crosses midnight, MOD handles it automatically.
A standard US work year: 52 weeks × 40 hours = 2,080 hours. After subtracting 10 federal holidays (8 hours each = 80 hours) and 2 weeks vacation (80 hours), net work time is ~1,920 hours per year.
8 hours = 480 minutes. Or 8 hours = 28,800 seconds. Our Time Units Converter handles all unit conversions.
If the end time is before the start time (e.g. 11 PM to 3 AM), the difference crosses midnight. Add 24 hours to the end time before subtracting. Our calculator handles this with the MOD approach.
9 AM to 5 PM = 8 hours total. Minus 30-min lunch = 7.5 hours of work time. This is the standard US full-time work shift.