9/80 Work Schedule Calendar
Pick the start of your two-week cycle to see every day off by date and how the 44/36-hour weeks are counted for overtime.
Free · runs in your browser · nothing is uploaded
How to use the 9/80 Work Schedule Calendar
- Set Schedule to 9/80 (5/4/9).
- Pick Crew A. The 9/80 pattern runs one crew, so there is only one to choose.
- Enter the first day of the cycle in Crew A starts the cycle on.
- Open Shift times and breaks and confirm the start, end and unpaid break for each shift type. The defaults are 08:00 to 17:00 for the 9-hour days and 08:00 to 16:00 for the 8-hour day, with no unpaid break. Hours and pay update from these times.
- Enter your Hourly rate.
- Choose a rule pack in What sets your overtime?, such as US federal 40-hour workweek (FLSA).
- Set First month and Months to show to cover the period you want to check.
- Tap a day to record what really happened. On a work day, taps cycle through sick, vacation, off and swapped shift. On a day off, a tap marks a picked-up shift. The rotation itself does not change, and marks are stored only in this browser. Use Clear my marks to remove them.
When you are done, Download calendar (.ics) adds one event per worked shift to Google, Apple or Outlook calendars. Download CSV gives a file of shifts with paid, regular and overtime hours and pay. Print prints the calendar without the form.
How do you create a 9/80 schedule?
A 9/80 schedule is built as a 14-day cycle in which each crew works nine of the 14 days and the two weeks add up to 80 hours. The pattern is four 9-hour shifts and one 8-hour shift in the first week, then four 9-hour shifts in the second week.
- Lay out 14 days, starting on the date you enter in Crew A starts the cycle on.
- In week one, work four long shifts, then one short shift, then take two days off. That is 44 hours.
- In week two, work four long shifts, then take three days off. That is 36 hours.
- Check the total: 44 + 36 = 80 hours for the cycle.
Shift codes in this tool follow that sequence: L (9 hours), S (8 hours) and O (off).
How is overtime counted under a 9/80 schedule?
Overtime depends on the rule pack you choose, and the tool counts it over whole workweeks, even when a week runs past the month edge. The table below uses the tool’s worked example: Crew A starting 1 Nov 2026, four weeks to 28 Nov, at $30 an hour.
| Rule pack | Paid hours | Overtime hours | Estimated gross pay |
|---|---|---|---|
| US federal 40-hour workweek (FLSA) | 160 | 8 at 1.5x | $4,920.00 |
| FLSA 7(k) fire (212 h in 28 days) | 160 | none | $4,800.00 |
The example counts 18 shifts and 152 regular hours under the FLSA standard. Employers that run a 9/80 under the FLSA commonly start the workweek halfway through the 8-hour Friday, so 4 of its hours fall in each workweek and every workweek holds exactly 40 hours. The calendar starts workweeks at midnight, so it shows the 44-hour week as 4 overtime hours; that is what happens when the workweek is not split this way. These are estimates using the rule pack you pick. Contracts and union agreements can set different rules, and this is not payroll or legal advice.
More questions
Is the 9/80 schedule the same as a 4/10 schedule?
No. Both are compressed workweeks, but 9/80 uses nine shifts over 14 days, while 4/10 uses four 10-hour days each week.
Can you provide an example of a 9-to-80 work schedule?
Yes. Crew A starting 1 Nov 2026, worked for four weeks to 28 Nov at $30 an hour, gives 160 paid hours and an estimated gross pay of $4,920.00 under the FLSA standard. Under the FLSA 7(k) fire rule, the same weeks show no overtime and an estimate of $4,800.00.
How should I handle holidays under a 9/80 work schedule?
Find the holiday in the calendar, since US federal public holidays are underlined. Then check whether it falls on a work day or a day off. The tool shows the day but does not set holiday pay, so check your employer’s rules.
Would the 9/80 schedule be beneficial for your business?
That depends on your staffing and coverage needs. Enter your shift times and check the coverage line for gaps or overlaps, then review the average hours and weekend share before deciding.
How this tool works and where the numbers come from
The calendar repeats the rotation from your crew’s start date and counts every shift minute by minute. Overtime and pay are worked out over whole workweeks (or the 7(k) and 7(j) work periods) under the rule pack you pick, following the official texts below. Results are estimates, not legal or payroll advice.
Sources
- 29 U.S.C. § 207 (FLSA § 7): overtime after 40 hours a week; § 7(j) hospitals (8 and 80); § 7(k) fire and police work periods (U.S. Code, 2023 Edition) · checked
- 29 CFR Part 778: overtime compensation (regular rate, workweek) (eCFR current as of 2026-10-23) · checked
- 29 CFR § 778.105: the workweek is a fixed and regularly recurring period of 168 hours (eCFR current as of 2026-10-23) · checked
- 29 CFR § 778.207(b): shift differentials are part of the regular rate (eCFR current as of 2026-10-23) · checked
- California Labor Code § 510: daily overtime over 8 hours, double time over 12, seventh day (as amended by Stats. 1999, ch. 134, effective 2000-01-01) · checked
- California Labor Code § 500: workday, workweek and alternative workweek schedule defined (added by Stats. 1999, ch. 134, effective 2000-01-01) · checked
- IWC Wage Order 5 (public housekeeping incl. health care), section 3(B)(8): 12-hour health care alternative workweek (effective 2002-07-01 as amended; sections 4(A) and 10(C) republished effective 2019-01-01) · checked
- California Labor Code § 511: alternative workweek schedules (up to 10-hour days without overtime) (as amended by Stats. 2012, ch. 46 (SB 1038), effective 2012-06-27) · checked
- IWC Wage Order 4 (professional, technical, clerical), section 3(B): alternative workweek schedules (effective 2002-01-01 as amended; sections 4(A) and 10(C) republished effective 2019-01-01) · checked
- 29 CFR § 553.230: maximum hours table, 212 h fire / 171 h police per 28 days and shorter periods (eCFR current as of 2026-10-23) · checked
- 29 CFR § 553.224: the 7(k) work period (7 to 28 consecutive days) (eCFR current as of 2026-10-23) · checked
- 29 CFR § 553.222: sleep time, excludable only on tours of duty of more than 24 hours (eCFR current as of 2026-10-23) · checked
- 29 U.S.C. § 213(b)(20) (FLSA § 13(b)(20)): fire and police agencies with fewer than 5 such employees (U.S. Code, 2023 Edition) · checked
- 29 CFR § 778.601: hospitals and residential care, 14-day period (8 and 80) (eCFR current as of 2026-10-23) · checked
- U.S. Office of Personnel Management: federal holidays (5 U.S.C. § 6103) · checked
- U.S. Department of Labor, Fact Sheet #23: overtime pay requirements of the FLSA (Revised October 2019) · checked
- California DLSE: overtime FAQ · checked
- California DLSE: overtime exceptions FAQ (alternative workweeks) · checked
- U.S. Department of Labor, Fact Sheet #8: law enforcement and fire protection employees (Revised March 2011) · checked
- U.S. Department of Labor, Fact Sheet #54: health care industry and overtime (8 and 80) (Revised July 2009) · checked
Frequently asked questions
What is a 9/80 schedule?
A 9/80 schedule is a compressed pattern in which nine shifts over a 14-day cycle add up to 80 paid hours. This tool’s pattern has a longest run of 5 days on and 3 days off.
Does the 9/80 schedule exceed the 40-hour workweek?
Not on average, since the pattern averages 40 paid hours per week. A single Monday-to-Sunday week can reach 44 hours, and under a 40-hour rule pack that extra time counts as overtime.
How many hours is a 9/80 schedule each week?
Each two-week cycle totals 80 hours, or 40 on average per week. A Monday-to-Sunday week ranges from 36 to 44 hours, and each crew works about 2086 hours and 234.6 shifts a year.
Is 9/80 or 4/10 better?
Neither is better for every team. The right choice depends on your coverage needs, the work being done and what your staff prefers. This page covers 9/80 only.
What is a compressed workweek?
A compressed workweek is when employees work the traditional 40 hours in fewer than five days. The 9/80 and 4/10 patterns are both examples.
What is the healthiest work schedule?
No single schedule is healthiest for everyone. Fit depends on sleep, commute, family needs and how long shifts feel, and research on this specific schedule is limited.
What does research say about the 9/80 schedule?
Little research has looked at the 9/80 schedule on its own. Broader studies on flexible work exist, so check the original source before relying on any single figure.
Which teams are best suited for a 9/80 schedule?
It fits work that can be organised in fortnightly blocks with one planned day off. With the default shift times, this pattern does not cover every hour with one crew, so check the coverage line.
Related tools
- Shift Calendar Maker: build a calendar for any shift rotation you plan to use.
- DuPont Schedule Calendar: compare a DuPont rotation with the 9/80 pattern.
- Pitman Schedule Calendar: check a Pitman rotation’s days on and off.
- 4 On 4 Off Schedule Calendar: view a 4-on, 4-off rotation month by month.
- 12 Hour Shift Schedule Comparison: weigh 12-hour shift patterns side by side.
- Overtime Calculator for Shift Workers: estimate overtime for hours you have already worked.
- Timesheet Calculator: total the hours on a single timesheet.
- How Many Work Hours in a Year: see the annual hour totals behind your schedule.