Schedule patterns
9/80 Work Schedule Generator
Generate a two week 9/80 calendar with nine workdays, alternating Fridays, and visible workweek boundaries.
Interactive tool
Build the rotation
Choose a start date and crew. The calendar applies the named pattern and calculates the actual workload.
9
Workdays
80
Hours
5
Longest run
Hours by calendar week
Common workweek split
Split the eight hour Friday at the fixed boundary to allocate four hours to each workweek. That produces two 40 hour workweeks for this example.
Aug 31
D9h
Sep 1
D9h
Sep 2
D9h
Sep 3
D9h
Sep 4
D8h
Sep 5
OSep 6
OSep 7
D9h
Sep 8
D9h
Sep 9
D9h
Sep 10
D9h
Sep 11
OSep 12
OSep 13
OThe eight hour day and fixed workweek boundary require explicit review. Calendar week totals alone do not determine overtime.
Practical guide
How the 9/80 Work Schedule Generator works.
A 9/80 schedule places 80 working hours across nine workdays in a two week period. A common pattern uses eight nine hour days, one eight hour day, and one recurring day off.
The defining detail is the fixed workweek boundary. Many implementations split the eight hour day into two four hour portions so each workweek totals 40 hours. Calendar week totals alone do not establish that result.
First workweek
Four nine hour days plus four hours from the split day.
Second workweek
Four hours from the split day plus four nine hour days.
Two week total
Nine workdays produce 80 scheduled hours.
Worked example
One common pattern schedules Monday through Thursday for nine hours, splits Friday at the workweek boundary, then schedules four more nine hour days before the next Friday off.
Check before use
- Document the exact workweek boundary.
- Align payroll, timekeeping, and employee communication.
- Review holidays, leave, and schedule changes against the pattern.
Why this tool exists
Make the 9/80 schedule calendar easier to review.
Choose the first Monday and alternating Friday off to generate the actual two week pattern and daily hours.
Use a real operating input
Choose the first Monday and alternating Friday off to generate the actual two week pattern and daily hours.
See the decision clearly
See which Friday is worked, how the nine days total 80 hours, and where review of the workweek boundary is required.
Keep the boundary visible
A 9/80 arrangement requires a correctly defined workweek and policy review before use for timekeeping or payroll.
How it works
From input to an operating decision.
- 1Enter the operating inputs
- 2Review the calculated calendar or totals
- 3Export the result for planning and review
Common questions
How does a 9/80 schedule reach 80 hours?
A common pattern uses eight nine hour days, one eight hour day, and one weekday off across two calendar weeks. Employers may structure the workweek boundary differently.
Can I use this result as a final payroll or staffing record?
Use the result as a planning aid. Confirm policies, workweek boundaries, pay rules, staffing requirements, and final records with the people responsible for them.
Why is the eight hour day split?
The split can place four hours in each defined workweek, allowing the common pattern to produce two 40 hour workweeks.
Is every 9/80 schedule the same?
No. The recurring day off, daily start times, break policy, workweek boundary, and treatment of exceptions must be defined by the employer.
Put the result into operation
The report is the starting point. The workflow is where the value appears.
Keep working
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