About

The 3/3 shift pattern creates a distinct lifestyle with long blocks of work followed by equal blocks of rest. A critical challenge for workers on this rotation is estimating monthly working hours for payroll verification, as the number of workdays fluctuates significantly from month to month (e.g., one month might have 14 shifts, the next 16).

This tool solves that problem. Beyond visualizing your 2026 rotation, it includes a "Total Hours Calculator." By inputting your standard shift length (e.g., 10, 12, or 24 hours), the tool aggregates the projected hours per month, helping you anticipate paycheck variances.

Formulas

Total monthly hours (H) are the sum of workdays multiplied by shift length (L).

H_month = ∑ (Days_work) × L

Work status logic:

Status = (Diff % 6) < 3

Reference Data

Pattern	Work Block	Rest Block	Cycle Total
Standard 3/3	3 Days	3 Days	6 Days
Shift Length	User Defined	0	N/A
Monthly Var.	13-17 Shifts	13-17 Days	High Volatility

Frequently Asked Questions

In a 3/3 cycle, the pattern repeats every 6 days. Since months are 30 or 31 days, the pattern desynchronizes with the calendar month, causing some months to be 'heavy' with workdays and others 'light'.

Yes. The calendar logic remains the same (days worked). You simply adjust the 'Shift Duration' input field to see the total hours for either 12h or 24h shifts.