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Annual Shift Hours Calculator

Estimate annual shifts, working hours and average weekly hours for a repeating shift rotation.

Worked example

A four-on/four-off pattern does not simply mean half the year at work once leave and 12-hour shifts are considered.

Frequently asked questions

Can I use this for 2 days, 2 nights, 4 off?

Yes, if all four working shifts are the same duration. Enter four work shifts and four rest days.

Does this account for leap years or roster quirks?

No. It is an annualised estimate based on a 365-day repeating cycle.

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