Real numbers for real shift work.
ShiftClock is a precision reference for night-shift workers, 12-hour rotations, split shifts, and irregular schedules — built around real BLS wage data, FLSA rules, and 50-state overtime law.
Open all calculators Browse by jobWeekly Shift Hours & Overtime
Punch in, punch out, deduct breaks, apply the FLSA 40-hour rule. Live numbers as you type.
Calculators built for shift work
Each tool handles the awkward parts: shifts that cross midnight, unpaid meal breaks, shift differentials, 7(k) public-safety overtime, and rotating cycles that average out across weeks.
Shift Hours Total Calculator
Compute total worked hours for a single shift, including shifts that cross midnight, with optional unpaid break deductions.
CalculatorWeekly FLSA Overtime Calculator
Apply 1.5x overtime to all hours over 40 per workweek, with regular and overtime breakouts.
CalculatorBiweekly Pay Period Calculator
Aggregate two consecutive workweeks into a single biweekly pay period total with regular and overtime split.
CalculatorNight Shift Differential Calculator
Apply evening, night, and weekend differentials on top of base hourly wages.
CalculatorRotating Shift Schedule Planner
Project total hours across a multi-week rotation such as 2-2-3, Pitman, DuPont, or 4-on/4-off.
CalculatorAnnual Shift Hours Calculator
Convert a weekly shift pattern into an annualized hours and earnings projection.
CalculatorMeal Break Deduction Calculator
Subtract paid and unpaid meal breaks from gross worked hours for any shift length.
CalculatorSplit-Shift Penalty Calculator
Add California-style split-shift premium pay (one hour at minimum wage) when applicable.
CalculatorHoliday Pay Multiplier Calculator
Compute holiday pay at 1.5x, 2x, or any custom multiplier over the base wage.
Pre-loaded calculators by occupation
Median hourly wages from the U.S. Bureau of Labor Statistics OEWS bulletins, paired with the typical shift pattern and overtime rule for each role.
Registered Nurse Calculator
$38.74/hr · Three 12-Hour Shifts (Healthcare)
Job calcLicensed Practical Nurse Calculator
$27.93/hr · Three 12-Hour Shifts (Healthcare)
Job calcCertified Nursing Assistant Calculator
$17.41/hr · Three 8-Hour Rotating Shifts
Job calcHospital Pharmacist Calculator
$63.50/hr · Two 12-Hour Rotating Shifts
Job calcRadiologic Technologist Calculator
$32.18/hr · Permanent Evening 8-Hour Shift
Job calcRespiratory Therapist Calculator
$35.40/hr · Three 12-Hour Shifts (Healthcare)
Job calcSurgical Technologist Calculator
$27.85/hr · On-Call Rotation
Job calcParamedic Calculator
$23.65/hr · 24-on / 48-off (EMS)
Overtime & break laws by state
Daily overtime, double-time, meal-break, rest-break, and split-shift rules for shift workers in every U.S. state.
Schedule patterns explained
Panama, Pitman, Kelly, DuPont, 4-on/4-off, hitch schedules — each pattern carries its own overtime, fatigue, and coverage profile.
Three 8-Hour Rotating Shifts
Classic Day, Evening, Night cycle covering 24 hours per day. Workers rotate weekly between shifts so each crew shares the burden of nights.
ScheduleThree 12-Hour Shifts (Healthcare)
Common in hospitals: three 12-hour shifts per week giving 36 hours straight time and four days off, with overtime triggered above 40 unless a 207(k) exemption applies.
ScheduleCompressed 4-10 Workweek
Four 10-hour days with three days off. The day off rotates so weekend coverage is maintained without daily overtime under federal law.
SchedulePanama Schedule (2-2-3)
Two on, two off, three on, two off, two on, three off across two crews. Used in continuous-process plants and power generation.
Schedule4-on / 4-off 12-Hour Rotation
Equal four-day blocks of work and rest with crews flipping between day and night halfway through each cycle.
SchedulePitman Schedule (2-3-2)
Variant of the Panama with extended weekends every other week. Popular in correctional and police agencies.
Industries that run around the clock
Drill into the occupations and staffing models that keep hospitals, plants, fleets, and security teams moving.
Hospital Healthcare
Acute care hospitals run 24/7 and rely on rotating nursing, technician, and support staff to maintain coverage across day, evening, and night shifts.
HealthcareLong-Term Care & Skilled Nursing
Skilled nursing facilities staff three traditional eight-hour shifts plus weekend coverage with strict break and overtime rules under the FLSA.
HealthcareEmergency Medical Services
Paramedics and EMTs commonly work 24-on/48-off or 12-hour rotations with sleep periods that may or may not count as hours worked.
ManufacturingDiscrete Manufacturing
Plants producing parts and assemblies typically operate two or three shifts per day with shift differential pay for evenings and overnights.
ManufacturingContinuous Process Manufacturing
Refineries, paper mills, and chemical plants use continuous 12-hour rotations such as the Panama or 2-2-3 schedules to keep equipment running around the clock.
ManufacturingFood & Beverage Processing
High-volume food plants run multiple production shifts plus a sanitation shift overnight with mandatory paid breaks under most state laws.
LogisticsWarehousing & Distribution
Fulfillment centers and distribution hubs use staggered four- and ten-hour shifts to match peak shipping windows.
TransportationLong-Haul Trucking
Over-the-road drivers track on-duty and off-duty hours under FMCSA rules separate from FLSA overtime calculations.
TransportationPublic Transit Operations
Bus and rail operators bid on split shifts, reverse splits, and straight runs that often span the early morning and evening commute peaks.
Guides for shift workers and payroll teams
Step-by-step explainers for the trickiest corners of the FLSA: sleep time, on-call status, split-shift premiums, 207(k) public-safety work periods, and more.
How to Calculate Night Shift Hours That Cross Midnight
Step-by-step guide
GuideTwelve-Hour Shift Overtime Explained
Step-by-step guide
GuideUnderstanding the 2-2-3 (Panama) Schedule
Step-by-step guide
GuidePitman vs Panama Schedule: Which Is Right For Your Operation?
Step-by-step guide
GuideThe Kelly Schedule for Fire Service Crews
Step-by-step guide
GuideFLSA Section 7(k) and Public Safety Overtime
Step-by-step guide