8am to 12pm is how many hours?
8:00 AM to 12:00 PM is 4 hours (4.00 decimal hours). Take off any unpaid break to get the hours you are actually paid for.
The quick answer
08:00 to 12:00 = 240 minutes 240 ÷ 60 = 4.00 hours = 4h 00m Minus a 30-minute unpaid break = 3h 30m paid
8am to 12pm after an unpaid break
| Unpaid break | Hours worked | Decimal hours |
|---|---|---|
| None | 4h 00m | 4.00 |
| 15 minutes | 3h 45m | 3.75 |
| 30 minutes | 3h 30m | 3.50 |
| 45 minutes | 3h 15m | 3.25 |
| 60 minutes | 3h 00m | 3.00 |
Deduct a break only when it is unpaid, and only once — a common payroll error is subtracting a break that the clock system has already excluded.
Across a week
| Days a week | No break | With 30-min break |
|---|---|---|
| 3 | 12h 00m | 10h 30m |
| 4 | 16h 00m | 14h 00m |
| 5 | 20h 00m | 17h 30m |
| 6 | 24h 00m | 21h 00m |
Weeks over 40 paid hours usually attract overtime. Split regular and overtime pay in the overtime pay calculator, or total a full timesheet in the time card calculator.
What the shift pays
Gross pay for one 3h 30m shift after a 30-minute unpaid break, before any deductions:
The same shift in other formats
- 12-hour: 8:00 AM – 12:00 PM
- 24-hour: 08:00 – 12:00
- Decimal hours: 4.00
- Minutes: 240
Payroll systems usually want decimal hours. Convert any other duration with the decimal hours converter, or read clock times with the military time converter.
Frequently asked questions
Is 8am to 12pm 4 hours exactly?
Yes — 8:00 AM to 12:00 PM is 240 minutes, which is 4 hours or 4.00 decimal hours. That is the elapsed time; unpaid breaks come off separately.
How many hours is 8am to 12pm with a 30-minute lunch?
3 hours 30 minutes, or 3.50 decimal hours. Subtract the break only if it is unpaid — see the lunch break guide if you are unsure.
What are these times in 24-hour format?
08:00 to 12:00. The military time converter handles any other time.
What is 8am to 12pm five days a week?
20 hours of elapsed time, or 17 hours 30 minutes once a 30-minute unpaid break is taken off each day. Totals should be summed from minutes, not from rounded daily decimals.