SRS

Date & Time

Shift Rotation Schedule Calculator

Build a rotation schedule with calendar horizon, scheduled and leave-adjusted work days, paid hours, and overtime-reference hours.

Work days per rotationOff days per rotationPaid hours per work shiftRotations to scheduleOvertime threshold per rotationTraining hours per rotationPlanned leave days deducted

Calendar days per rotation-

Scheduled work hours per rotation-

Hours above entered threshold-

Calendar schedule horizon-

Scheduled work days before leave-

Work days after entered leave-

Scheduled hours before leave-

Hours after entered leave deduction-

Rotation overtime across horizon-

Decision view

Work-off rotation Gantt plan

Work-off rotation Gantt planRepeated work and rest blocks preserve cycle boundaries while hours accumulate across the horizon.

Exact scenario comparisonRotations to schedule changes while all other entered assumptions remain constant.

Rotations to schedule	Calendar days per rotation	Scheduled work hours per rotation	Hours above entered threshold	Calendar schedule horizon	Scheduled work days before leave	Work days after entered leave	Scheduled hours before leave	Hours after entered leave deduction	Rotation overtime across horizon

Period-by-period detail

Rotation-by-rotation work schedule

Calendar days, work days, scheduled hours, and overtime references accumulate by complete rotation.

How to use Shift Rotation Schedule Calculator

Define work days, off days, and hours per shift.
Add training hours and the threshold for one rotation.
Enter complete rotations and leave days.
Review the Gantt blocks and cumulative-hour milestones.

Calculator guide

Understanding Shift Rotation Schedule Calculator

A repeating shift rotation combines work days, off days, paid shift hours, training, overtime references, and leave. This calculator preserves the cycle unit before extending it across the planning horizon.

Cycle first Every total starts with one rotation.

Calendar includes rest Off days extend the horizon.

Training stays explicit It is not hidden in shift length.

Leave applies last Entered leave removes shift hours.

Calculation method

How the calculation works

Define one complete work-off rotation, repeat it for the entered count, and retain scheduled, overtime-reference, calendar, training, and leave-adjusted quantities separately. Add work and off days for one cycle, calculate cycle hours and threshold excess, multiply by complete rotations, then deduct entered leave days.

Detailed calculation process

Expand one work-off cycle into a complete rotation plan

The defaults repeat a four-on/four-off cycle 13 times, using 12-hour shifts, 2 training hours per cycle, a 40-hour threshold, and 3 leave days.

General formula: C = W+O; H_c = Wh+T; H_ot = max(H_c-H_lim,0); D = nC; H = nH_c; H_adj = max(H-Lh,0) One cycle is the reusable planning block. Calendar days, scheduled hours, and threshold excess are calculated once, then multiplied by the number of complete rotations; leave removes shift hours afterward.

What each symbol means

W, O, C Work days, off days, and total calendar days per rotation (days).

h, T Paid hours per work shift and training hours per rotation (hours).

H_lim, H_ot Entered cycle threshold and hours above it (hours/rotation).

n, D Number of rotations and resulting calendar horizon (days).

L Planned leave days deducted (days).

H, H_adj Scheduled and leave-adjusted hours across the horizon (hours).

Worked substitution with the default inputs

1. Define one calendar cycle: C = 4 work days + 4 off days = 8 days/rotation Work and rest blocks together determine elapsed calendar time.

2. Calculate cycle hours: H_c = 4*12 + 2 = 50 hours/rotation Training is added once per rotation to shift hours.

3. Calculate the overtime reference: H_ot = max(50 - 40,0) = 10 hours/rotation This is only an entered-threshold comparison, not a payroll ruling.

4. Expand the full schedule: D = 13*8 = 104 days; H = 13*50 = 650 hours; work days = 13*4 = 52 The Gantt view repeats exactly 13 complete cycles.

5. Apply leave and check totals: Net work days = 52-3 = 49; H_adj = 650-3*12 = 614 hours; total overtime reference = 13*10 = 130 hours Leave deducts shift hours but not the separately entered training hours.

The default plan spans 104 calendar days and schedules 650 hours before leave, 614 hours after three leave days, and 130 threshold-reference hours.

Rotation calendar

See work, rest, and leave as a repeating Gantt plan

Cycle blocks preserve calendar sequence while cumulative labels expose hour totals.

Work block Four default duty days.

Rest block Four default off days.

Cycle boundary Training and threshold reset here in the model.

Leave deduction Hours are removed after the schedule expands.

Worked situations

Practical examples

One default rotation spans eight calendar days.
Each rotation contains 50 scheduled hours.
Thirteen rotations yield 104 calendar days and 650 scheduled hours.

Better inputs

Useful tips

Match the cycle boundary to the employer's actual roster.
Treat partial rotations separately from this complete-cycle model.
Confirm how training, leave, and overtime are classified by payroll rules.

Before relying on the result

Limitations and common mistakes

Dates, weekdays, holidays, night premiums, breaks, and partial cycles are not assigned.
The threshold is a planning comparison and may not match statutory or contractual overtime periods.
Fatigue and staffing safety require roster-specific professional review.

Reference

Key terms

Rotation: One complete repeating work-off cycle.
Threshold reference: Hours above the user-entered comparison limit.
Leave-adjusted hours: Scheduled hours after deducting leave days times shift hours.

Important note

Calculated directly from the entered values using the displayed formula and rounding settings.

Frequently asked questions

Does a 40-hour threshold mean legal overtime?

No. It is only the entered per-rotation comparison.

Why does leave not reduce calendar horizon?

Leave replaces scheduled work inside the same elapsed roster period.

Are training hours removed with leave?

No. The model subtracts leave days times shift hours only.

Can I model half a rotation?

Not directly; the rotation count represents complete cycles.