DuPont Shift Schedule Calculator
How Does the DuPont Shift Schedule Work?
The DuPont shift schedule is a 28-day rotating pattern developed by — and named after — the DuPont chemical company, where it was introduced to improve both worker welfare and productivity on continuous-operation sites. It remains one of the most rigorous and well-structured shift systems used in industrial settings today.
The 28-day sequence for each team runs as follows: 4 nights on, 3 days off, 3 days on, 1 day off, 3 nights on, 3 days off, 4 days on, 7 days off. That final 7-day rest block is the defining characteristic of the DuPont schedule — and for most workers, the main reason they value it.
Four teams rotate through the cycle, each starting at a different point so that full 24/7 coverage is maintained at all times. All shifts are 12 hours. The average working week across the 28-day cycle works out to approximately 42 hours.
The 7 consecutive rest days come after the longest working block and allow meaningful recovery from accumulated fatigue, particularly after runs of night shifts. Many workers use this block as a pseudo-holiday, taking a short break away, catching up with family, or simply recovering their sleep cycle. Because the time off is predictable and regular, it is easier to plan than ad-hoc annual leave.
The pattern is most common in the chemical and petrochemical industry, oil and gas processing (both onshore and offshore), paper mills, and power generation. These are environments where stopping production is expensive or dangerous, so continuous staffing is essential and fatigue management is taken seriously.
The main challenge of the DuPont schedule is the transition between nights and days within the same cycle. The single rest day between a 3-night run and a 4-day run is short. Workers need excellent sleep hygiene and often rely on blackout curtains, timed light exposure, and careful eating routines to manage the transition effectively.
How to Use This Calculator
- Select the DuPont card — it should already be highlighted on this page. Choose your crew letter (A, B, C, or D) from the team selector.
- Enter the start date of your 28-day cycle — if you are not sure of this, check your site rota system or ask your shift coordinator. The 28-day cycle start date is different from your next working day.
- Click "Show my 12-month calendar" — your full year will appear. The 7-day rest blocks are clearly visible as an extended run of grey rest days. Bank holidays are flagged based on your chosen country. Use the date checker to look up any specific day.
Frequently Asked Questions
What is the DuPont shift schedule?
The DuPont shift schedule is a 28-day rotating pattern that runs: 4 nights on, 3 off, 3 days on, 1 off, 3 nights on, 3 off, 4 days on, 7 off. Four crews rotate through the sequence to maintain 24/7 coverage. It is named after the DuPont company where it was developed for continuous industrial operations.
How long is the DuPont shift cycle?
The DuPont cycle is exactly 28 days long. With four teams each starting at a different point in the cycle, the full rotation across all four crews takes 28 days before the sequence repeats. Each team works the same number of shifts and rest days over any 28-day window.
Why do DuPont workers get 7 days off in a row?
The 7-day rest block is a deliberate design feature. It follows the most demanding working block in the cycle and provides workers with enough time to fully recover from accumulated night-shift fatigue. Research at the time DuPont developed the schedule showed that workers were safer and more productive when given extended recovery periods rather than frequent short ones.
What industries use the DuPont schedule?
The DuPont schedule is most common in the chemical industry, petrochemical refineries, oil and gas processing (both onshore plant and some offshore rotations), paper mills, and continuous-cast steel mills. Any industry where stopping production is very costly or carries safety risks tends to evaluate the DuPont schedule as a fatigue management tool.
How does DuPont compare to Panama / 2-2-3?
Both patterns use four teams, 12-hour shifts, and average about 42 hours per week. The key difference is how rest is distributed. Panama runs a 14-day cycle with rest spread as shorter, more frequent blocks — typically 2 to 3 days at a time. DuPont runs 28 days and concentrates rest into one long 7-day block per cycle. Workers who value the ability to take a proper break once a month tend to prefer DuPont; those who prefer never being more than a few days from rest tend to prefer Panama.
How do I know which team I'm on?
Your employer assigns you to a team (A, B, C, D — sometimes Red, Blue, Green, Yellow). Each team works the same pattern but offset from the others so the workplace stays covered. Check your employment contract, rota notice board, or pay slip, or ask your line manager. Picking the wrong team in the calculator above will show you the opposite days, so it's worth confirming before you rely on the calendar.
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