4 on 4 off Shift Schedule: Calendar Calculator & Complete Guide
Set the first day of any 4-shift block below and see every work day and rest day for the next 12 months — including exactly which of your 4-day breaks contain a full weekend.
How the 4 on 4 off schedule works
The 4 on 4 off is the most literal of all rotating patterns: work four, rest four, repeat. Each crew runs 12-hour shifts through an 8-day cycle, and four crews — two on days, two on nights — keep the site covered around the clock. It is a staple of security, distribution centers, manufacturing, control rooms, and emergency services, and it is probably the single most common continuous pattern in the UK.
| Days 1–4 | Days 5–8 |
|---|---|
| Work ✕4 (12-hour shifts) | Off ✕4 |
There is no long-week/short-week trickery and no mid-cycle single days off — the entire pattern fits in one sentence. That simplicity is why crews rarely need a printed roster after the first month… right up until someone asks "so are you free on the 23rd?" and the mental math starts. That question is what the calculator above answers instantly.
4 on 4 off by the numbers
- Cycle length: 8 days — 4 working, 4 off
- Hours: 48 per cycle, an average of 42 per week
- Working days per year: ~182–183 (≈2,190 hours)
- Longest stretch: 4 consecutive 12-hour shifts
- Crews needed: 4 (two day, two night)
The drifting days off — the one thing to understand
Because 8 does not divide into 7, your block of days off lands one weekday later every cycle: if this break starts on a Monday, the next starts on a Tuesday, then a Wednesday, and so on. The full alignment repeats every 8 weeks. In each 8-week loop your breaks sweep through every position of the week — including roughly three breaks that contain both Saturday and Sunday.
The upside is fairness: nobody owns the good weekends permanently. The downside is that standing weekly commitments don't fit — you will work roughly half of any given weekday over time. Shift workers on this pattern tend to plan life in 8-day blocks rather than weeks, and the 12-month calendar above (or the .ics file in your phone's calendar) makes that planning trivial.
Pros and cons workers actually report
What people love
- Four days off is a real reset — long enough to travel, recover, or work a side project.
- The rhythm is unbreakably simple; you always know where you are in the cycle.
- Only ~15 working days a month, and every break is the same generous length.
What people struggle with
- Day four of the work block is the hard one — fatigue compounds across 48 hours of work.
- Days off drift, so fixed weekly commitments (leagues, classes, standing family dinners) suffer.
- On fixed night crews, four nights in a row demands a disciplined sleep routine.
Using the calculator for your crew
One remembered date pins the whole year: set the cycle start date to the first day of any 4-shift block, pick day or night crew, and check any date with one tap. If your site actually runs a two-week pattern with alternating weekends, you may be on a 2-2-3 (Panama) instead — and if your rotation mixes days and nights inside one cycle, compare the DDNNOO 6-day rotation. Working out what the hours are worth? Feed this same schedule into the shift pay calculator.
Frequently asked questions
What is a 4 on 4 off shift schedule?
You work four consecutive shifts (usually 12 hours), then get four full days off, and the 8-day cycle repeats. Two day crews and two night crews cover the clock, so operations run 24/7 while every worker gets a guaranteed 4-day break after every block.
How many hours a week is 4 on 4 off?
It averages 42 hours per week: four 12-hour shifts every 8 days works out to 48 hours per cycle, or 42 per calendar week. Because the 8-day cycle does not line up with the 7-day week, some calendar weeks contain three shifts (36 hours) and others four (48 hours).
How many days a year do you work on 4 on 4 off?
A full year contains about 45–46 complete cycles, which is roughly 182–183 working days — about 2,190 hours at 12 hours per shift. The exact count for your crew depends on where your cycle sits, which the calculator above works out from one remembered date.
Do you get weekends off on a 4 on 4 off schedule?
Sometimes — and on a predictable rotation. Because the cycle is 8 days long, your 4-day break lands one weekday later every cycle. Over an 8-week loop your break hits every position in the week, including about three breaks that contain a full Saturday–Sunday.
Is 4 on 4 off a good schedule?
Workers tend to love the simplicity: the rhythm never changes, four days is enough to genuinely rest or travel, and childcare can be split cleanly with a partner on the opposite crew. The main complaints are the four 12-hour shifts in a row and the drifting days off, which make regular weekly commitments (a Tuesday class, a Sunday league) hard to keep.