Ramp, peak, taper, and fatigue-adjusted effective-hours timelineLive current inputs
Date & Time
Overtime Hours Timeline Calculator
Model ramp, peak, and taper overtime phases with fatigue-adjusted effective hours, completion date, workload share, and phase-level detail.
Scheduled overtime hours—
Fatigue-adjusted effective hours—
Hours lost to fatigue—
Timeline completion date—
Peak-phase share—
Average scheduled overtime/day—
Total overtime workdays—
Load assessment—
Fatigue-adjusted load timeline
Ramp, peak, taper, and fatigue-adjusted effective-hours timeline
Phase blocks show planned load while a second rail discounts peak hours for fatigue.
Live decision table
Overtime phase ledger
Compare workdays, scheduled hours, effective output, and date span by phase.
| Phase | Workdays | Hours/day | Scheduled hours | Effective hours | Date range |
|---|
Cash-flow schedule
Annual and monthly cash-flow schedule
How to use
Translate the requirement into dated work capacity
- Enter the actual planning start date.
- Use a sustainable overtime cap.
- Match the real workweek.
- Exclude known unavailable days.
Calculation logic
Capacity and calendar availability are separate constraints
Required workdays come from hours divided by daily capacity. Calendar span then accounts for nonworking days.
The schedule never assumes every calendar day is available.
Calculation method
Total phase hours and discount peak productivity explicitly
Scheduled hours are the payroll-time plan; effective hours apply the entered fatigue loss only to the peak phase.
Detailed calculation process and general formulas
H=r_d r_h+p_d p_h+t_d t_hH_eff=r_d r_h+p_d p_h(1-f)+t_d t_hLoss=H-H_effDate_end=advance_workdays(Date_0,D)Symbols, meanings, and units
- r_d,p_d,t_d
- phase workdaysdays
- r_h,p_h,t_h
- phase overtime per dayhours/day
- f
- peak fatigue lossdecimal
- H_eff
- effective productive overtimehours
Decision checks
Confirm policy and fatigue limits
- Local overtime law and approval.
- Rest periods and consecutive-day limits.
- Holiday and leave calendars.
- Payroll rounding and cutoff dates.
Schedule anatomy
What sets the completion date
Hours, daily capacity, workweek, and exclusions each affect timing.
Scheduled hours
—Total overtime time on the plan.
Effective hours
—Output-equivalent hours after peak fatigue.
Fatigue loss
—Difference between scheduled and effective hours.
Decision takeaway: Use the schedule as a capacity plan, then confirm approval and rest requirements.
Practical applications
Decisions this calculator is designed to support
Month-end backlog
A team allocates overtime across normal business days.
What the result clarifies: The calendar exposes whether the deadline is realistic.
Holiday week
One unavailable workday falls inside the plan.
What the result clarifies: The exclusion shifts the completion date instead of increasing daily load.
Worked example
Current-input substitution and reconciliation
Important note
This planning tool does not determine legal overtime, payroll entitlement, union rules, fatigue safety, or employer approval.
Overtime Hours Timeline Calculator FAQ
Are weekends counted?
Only when the entered workdays per week includes them.
How are holidays handled?
The entered count removes the earliest scheduled workdays as a planning approximation.
Can the last day be partial?
Yes. The final day's planned hours are capped at the remaining requirement.