12-Hour Shift Calculator
Start with a 7 AM to 7 PM shift and adjust times or breaks as needed.
Find the elapsed time between the start and end, including a midnight crossing when needed, then subtract unpaid breaks. A 12-hour elapsed span becomes less than 12 net hours when breaks are deducted.
12-Hour Shift Calculator
Total worked
Not calculated
Estimate before taxes, deductions, or jurisdiction-specific rules.
Breakdown
- Elapsed
- Not calculated
- Breaks
- Not calculated
- Net worked
- Not calculated
This result is a mathematical estimate based only on the values entered.
How do you calculate a 12-hour shift?
Find the elapsed time between the start and end, including a midnight crossing when needed, then subtract unpaid breaks. A 12-hour elapsed span becomes less than 12 net hours when breaks are deducted.
The preset is twelve hours, but all fields remain adjustable.
Net shift = 12-hour elapsed duration − entered breaks.
Worked example
A 07:00 to 19:00 shift is 12 hours; a 30-minute unpaid break reduces it to 11 hours 30 minutes.
Day and overnight 12-hour shift checks
A twelve-hour schedule can describe either a clock span or twelve paid hours. These checks make that distinction explicit before the result is copied.
- 07:00 to 19:00
- This is a twelve-hour daytime span. Any entered break reduces the net worked result below twelve hours.
- 19:00 to 07:00
- The end occurs on the following day, so the calculator adds the midnight crossing before deducting breaks.
- Multiple breaks
- Keep meal and rest deductions separate when you need to verify how their combined minutes affect the shift.
Important cases
- Overnight 12-hour shifts cross midnight automatically.
- Breaks may reduce the net result below twelve hours.
Common questions
How do you calculate a 12-hour shift?
Find the elapsed time between the start and end, including a midnight crossing when needed, then subtract unpaid breaks. A 12-hour elapsed span becomes less than 12 net hours when breaks are deducted.
What should you check when using the 12-Hour Shift Calculator?
Overnight 12-hour shifts cross midnight automatically. Breaks may reduce the net result below twelve hours.
Calculated using whole-minute arithmetic. Review the calculation methodology and rounding rules.