4 on 4 off schedule

Four 12-hour shifts, then four days off. Crews alternate a block of days and a block of nights.

Shift times, holidays and more

Set the date crew A starts day 1 of the cycle, pick your crew to highlight it, then print the year or download your shifts as a calendar file for your phone.

Find my crew

Not sure which crew you are? Enter up to four dates and what you worked (a mix of work days and days off works best). The calendar switches to the crew that matches.

Check a date

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:

12345678910111213141516
DayDayDayDayOffOffOffOffNightNightNightNightOffOffOffOff

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 onHours in each week of the 112-day repeatAverage overtime per week
Day 148, 48, 48, 48, 36, 36, 36, 36, 48, 48, 48, 48, 36, 36, 36, 364
Day 236, 48, 48, 48, 48, 36, 36, 36, 36, 48, 48, 48, 48, 36, 36, 364
Day 336, 36, 48, 48, 48, 48, 36, 36, 36, 36, 48, 48, 48, 48, 36, 364
Day 436, 36, 36, 48, 48, 48, 48, 36, 36, 36, 36, 48, 48, 48, 48, 364
Day 536, 36, 36, 36, 48, 48, 48, 48, 36, 36, 36, 36, 48, 48, 48, 484
Day 648, 36, 36, 36, 36, 48, 48, 48, 48, 36, 36, 36, 36, 48, 48, 484
Day 748, 48, 36, 36, 36, 36, 48, 48, 48, 48, 36, 36, 36, 36, 48, 484

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.