Quick answer: on 4 on 4 off, each crew works four 12-hour shifts and then has 4 days off. That is half the days of the year, 42 hours a week on average. Here crews alternate a block of days and a block of nights, a 16-day cycle for 4 crews.
Find my crew: not sure which crew you are? Enter a few dates you worked or had off and the calendar lines itself up with your rotation. Download your shifts with their real start and end times to your phone calendar, show federal holidays, or check any date to see who is on.
The 4 on 4 off pattern, day by day
One crew, one full 16-day cycle:
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Day | Day | Day | Day | Off | Off | Off | Off | Night | Night | Night | Night | Off | Off | Off | Off |
4 on 4 off hours by workweek
42 hours a week on average; single weeks from 36 to 48. Overtime over 40: 4 to 4 hours a week on average, set by the cycle day the workweek begins.
| Workweek begins on | Hours in each week of the 112-day repeat | Average overtime per week |
|---|---|---|
| Day 1 | 48, 48, 48, 48, 36, 36, 36, 36, 48, 48, 48, 48, 36, 36, 36, 36 | 4 |
| Day 2 | 36, 48, 48, 48, 48, 36, 36, 36, 36, 48, 48, 48, 48, 36, 36, 36 | 4 |
| Day 3 | 36, 36, 48, 48, 48, 48, 36, 36, 36, 36, 48, 48, 48, 48, 36, 36 | 4 |
| Day 4 | 36, 36, 36, 48, 48, 48, 48, 36, 36, 36, 36, 48, 48, 48, 48, 36 | 4 |
| Day 5 | 36, 36, 36, 36, 48, 48, 48, 48, 36, 36, 36, 36, 48, 48, 48, 48 | 4 |
| Day 6 | 48, 36, 36, 36, 36, 48, 48, 48, 48, 36, 36, 36, 36, 48, 48, 48 | 4 |
| Day 7 | 48, 48, 36, 36, 36, 36, 48, 48, 48, 48, 36, 36, 36, 36, 48, 48 | 4 |
Why the week keeps changing
An 8-day block does not fit a 7-day week, so your days off drift one weekday later each cycle and land on a weekend only some of the time. Weekly hours move between 36 and 48, which is why the overtime average is lower than on DuPont or 2-2-3.
Prefer whole weeks on and off? Compare the 7 on 7 off schedule.
Formula and examples checked . Found a problem? Tell us.
Questions
How many days a year is 4 on 4 off?
About 182 or 183 shifts, half the days in the year.
How much overtime is 4 on 4 off?
About 4 hours a week on average under the 40-hour rule, because weeks alternate between 36 and 48 hours.