What this Australian working days calculator counts

The calculator begins with two calendar dates and applies the boundary option. Including both boundaries counts the start and end when they fall inside the effective range. Excluding one boundary moves that end of the period inward by one calendar day. It then checks every included date against the selected roster pattern. Monday-to-Friday, Sunday-to-Thursday, Monday-to-Saturday and every-day patterns are available.

Next, the calculator parses the public holiday dates that you enter. A valid holiday is deducted once only when it falls within the effective period and on a day that would otherwise be rostered. A holiday on a non-rostered day does not reduce working days, because that day was never counted as work. Invalid dates, duplicates and dates outside the period are included in the ignored-entry count. Finally, the entered number of other rostered days is subtracted and the result is multiplied by planned hours per day.

Choose the date boundaries deliberately

“From 1 July to 30 September” is often intended to include both dates, while elapsed-time calculations sometimes exclude the starting event. Contract wording, payroll periods and project schedules can use different conventions. The docket states the dates after the selected boundary treatment, making the count reproducible. If both boundaries are excluded from a two-day period, the effective range is empty and the page asks for a wider or different range.

The page uses calendar dates rather than clock times. It constructs and compares them in a stable day-by-day sequence, so daylight saving clock changes do not add or remove a date. It does not count part-days. For a midday start, half-day holiday, compressed shift or partial absence, calculate the day count first and adjust planned hours separately.

Select a roster that matches the work

A Monday-to-Friday pattern is common but is not a legal definition of a working day for every purpose. Retail, hospitality, health, resources, transport and continuous operations can roster weekends. The Sunday-to-Thursday option supports another five-day pattern, and Monday-to-Saturday supports a six-day operation. Every-day mode is useful for calendar-based operational coverage. Rotating rosters such as four-on/four-off cannot be represented exactly by these fixed weekly patterns; create a list externally or count roster blocks and use other exclusions carefully.

Other rostered days to exclude is a simple whole-number adjustment for known leave, workplace shutdowns or days that will not be worked. Do not enter weekend days, holidays already pasted, or the same absence twice. The field does not verify entitlement to personal leave, annual leave, rostered days off or unpaid leave. It only modifies the planning count.

Public holidays in Australia

Fair Work publishes national and state or territory public holiday information, while the actual declaration and regional coverage comes from the relevant jurisdiction. New Year’s Day, Australia Day, Good Friday, Easter Monday, Anzac Day, Christmas Day and Boxing Day are widely recognised, but substitute arrangements and additional holidays differ. Labour Day, King’s Birthday, show days and local holidays can occur on different dates and in different regions.

Use ISO format YYYY-MM-DD, such as 2026-12-25. Commas and spaces are accepted. Check the year carefully. A duplicated date is ignored after the first valid occurrence so it cannot reduce the result twice. If an observed holiday falls on a weekday while the nominal date is on a weekend, enter the observed date that legally applies to the relevant employee and location; do not assume the calculator will generate it.

Fair Work also explains that employees do not have to work on a public holiday unless the employer’s request is reasonable, and an employee may refuse an unreasonable request. Whether work occurs and what payment applies depends on the circumstances and industrial instrument. This page counts dates only. It does not decide whether a request to work is reasonable, calculate penalty rates or determine an employee’s public holiday entitlement.

Worked counting example

Suppose a project runs from Wednesday 1 July 2026 through Wednesday 30 September 2026, with both dates included and a Monday-to-Friday roster. There are 92 calendar days in the inclusive span. Thirteen full weeks contribute 65 weekdays and the remaining Wednesday contributes one, giving 66 rostered weekdays before exclusions. If the two pasted dates are not rostered applicable holidays for this range or location, they are ignored. Subtracting three other rostered days produces 63 working days. At 7.6 planned hours per day, that equals 478.8 hours.

Change a holiday entry to a valid weekday inside the range and the working-day result falls by one. Entering the same holiday twice still deducts it once. Changing to every-day mode counts all calendar days before exclusions. These checks make it easier to see whether a surprising total comes from boundaries, roster, holiday coverage or manual adjustments.

Planning uses and limits

The output should not replace a contractual definition. “Business day” in a finance document may exclude specific cities’ public holidays and days between Christmas and New Year. Court, banking and government deadlines can have statutory rules. Employment calculations can depend on ordinary hours, service, paid and unpaid absences, or part-time patterns. Use the calculator as a transparent date count and have the governing rule checked separately.

Quality checks for a defensible result

Record the start and end dates, boundary choice, roster, hours per day and source of every holiday. Compare the calendar-day count with a separate calendar. Confirm that each deducted holiday is both applicable and rostered. Review ignored entries rather than assuming they are harmless. Confirm other exclusions are whole rostered days and are not duplicated. Save the inputs with the date the schedule was prepared.

When the period spans more than one year, obtain the official holiday list for each year. Announced one-off holidays and local substitutions can change. Recalculate when a roster, project date or holiday declaration changes. For workforce planning, calculate each materially different roster group separately instead of averaging employees with different days.

Frequently asked questions