Calculate Your Shift Pattern Hours
The shift pattern calculator above does more than generate a calendar. It calculates the numbers behind your rotation. See your average hours per week, total work days per year, night shift count, weekend work ratio, and monthly hour breakdowns. These numbers matter for overtime tracking, earnings estimates, and comparing patterns before committing to one.
Calculate Your Pattern in 3 Steps
The ShiftScheduleUp shift pattern calculator gives you the numbers behind any rotation. See your hours, overtime, days off, and more in seconds.
Choose from 12+ preset rotation patterns or build a custom one. The calculator supports every major pattern used across industries worldwide.
Set your start date and team, then generate your schedule. The calculator maps your exact rotation for up to 12 months.
Open the Statistics dashboard to see hours per week, days off, night shifts, weekend ratio, overtime, and monthly breakdowns for your specific pattern.
Select your shift pattern, generate the calendar, then open the Statistics dashboard to see the full breakdown. Every calculation is based on your actual rotation cycle, not averages or estimates.
What the Shift Pattern Calculator Shows You
Hours Per Week
Your average weekly hours depend on your pattern’s cycle length and shift duration. A 2-2-3 with 12-hour shifts averages 42 hours per week. A 24/48 with 24-hour shifts averages 56 hours. The shift pattern calculator shows your exact average based on the pattern you select.
Work Days vs. Off Days Per Year
Over a full year, different patterns give you very different amounts of time off. The 4-on-4-off gives you roughly 183 days off per year. The DuPont gives about 182 days off plus a 7-day block every cycle. The calculator counts your exact work and off days for 12 months.
Night Shifts Per Month
Night shifts affect your health, sleep, and social life differently than day shifts. The CDC’s NIOSH division has published extensive research on the health impacts of night shift work. The calculator breaks down how many night shifts you work each month, so you can plan recovery time and see which months are heavier on nights.
Weekend Work Ratio
How many weekends do you actually work? The answer varies dramatically by pattern. The 2-2-3 gives you every other weekend off. The Continental rotates weekends across all teams. The shift pattern calculator shows your exact weekend work percentage.
Monthly Hour Breakdown
Not every month is equal in a rotating schedule. Some months you work more hours than others depending on where the cycle falls. The calculator shows a month-by-month breakdown so you can identify your heaviest and lightest months.
What the Calculator Tracks
Your exact average hours per week based on your pattern’s cycle length and shift duration. Not an estimate, but a calculation from your actual rotation.
Total off days across 12 months. See how your pattern compares to others and identify which months give you the most rest.
Monthly breakdown of night shifts so you can plan recovery time and see which months are heavier on nights.
Your exact percentage of weekends worked. Important for work-life balance and planning family time.
See which months push you over the overtime threshold. Useful for earnings estimates and fatigue management.
Month-by-month hour totals showing your heaviest and lightest months. Plan around the peaks and valleys of your rotation.
Shift Pattern Hours Comparison
Here is how the most common shift patterns compare on key metrics:
| Pattern | Avg Hours/Week | Shift Length | Days Off/Year (approx) | Night Shifts |
|---|---|---|---|---|
| 2-2-3 | 42 | 12h | ~182 | Every other cycle |
| DuPont | 42 | 12h | ~182 | 7-day blocks |
| Pitman | 42 | 12h | ~182 | Alternating weeks |
| 4-on-4-off | 42 | 12h | ~183 | Alternating blocks |
| Kelly | 56 | 24h | ~243 | N/A (24h shifts) |
| 24/48 | 56 | 24h | ~243 | N/A (24h shifts) |
| 48/96 | 56 | 24h | ~243 | N/A (24h shifts) |
| Continental | 42 | 8h | ~104 | Rotating blocks |
| 4-on-2-off | ~47 | 10h | ~122 | Rotating |
| DDNNOO | 56 | 12h | ~122 | Every cycle |
Note: Exact numbers vary based on start date and calendar year. Use the shift pattern calculator above for precise figures based on your specific dates.
Overtime Calculations
Many shift patterns average more than 40 hours per week, which means regular overtime. The 24/48 and Kelly patterns average 56 hours per week, that’s 16 hours of overtime every week at time-and-a-half rates. Even the 2-2-3 at 42 hours per week generates 2 hours of weekly overtime.
The U.S. Department of Labor requires overtime pay at 1.5x the regular rate for hours exceeding 40 per workweek under the Fair Labor Standards Act. However, some states and industries have different thresholds. Firefighters and police officers, for example, may have different overtime rules under Section 7(k) of the FLSA.
The shift pattern calculator helps you understand your overtime exposure. Generate your calendar, check the statistics dashboard, and see your monthly hour totals. Compare those against your employer’s overtime threshold to estimate your overtime pay.
Using the Calculator to Compare Patterns
If your workplace is considering switching rotation patterns, the shift pattern calculator is the fastest way to compare options. Generate one pattern, note the key statistics (hours per week, days off, night shift count, weekend ratio), then switch to another pattern and compare. The comparison table above gives you a quick overview, but the calculator provides exact numbers based on your specific start date and calendar year.
Key factors to compare:
- Total hours per year. Directly affects your earnings and fatigue levels.
- Consecutive work days. Longer stretches are more tiring but give longer breaks.
- Night shift distribution. Some patterns cluster nights together, others spread them out.
- Weekend coverage. Important for work-life balance and family time.
- Overtime potential. Patterns averaging over 40 hours generate regular overtime pay.
Use our Schedule Finder for industry-specific recommendations on which pattern works best for your profession.