Working Hours Between Dates Calculator
Estimate working hours between two dates from weekdays, public holidays and your daily hours, such as 7.6 hours for a 38-hour week.
7.6 hours a day equals a 38-hour full-time week.
Your results
Calculation breakdown
- Working days
- Weekdays from start to end date inclusive − public holidays
- Working hours
- Working days × daily hours
Worked example
A 4-week project from Monday 2 March to Friday 27 March 2026 has 20 weekdays. With 1 public holiday and 7.6 hours a day, that gives 19 working days, or 144.4 working hours (144h 24m).
Assumptions
- Only Monday to Friday is treated as a working day, and both the start and end dates are counted when they fall on a weekday.
- Enter only public holidays that fall on a weekday in the range; holiday dates vary by state and territory.
- Part days such as rostered days off, leave or overtime are not modelled and should be adjusted for manually.
How this calculator works
This calculator multiplies the number of business weekdays between two dates by your standard daily working hours to estimate total working hours available. It's handy for scoping projects, estimating billable capacity or planning rostered shifts across a date range.
Count working hours across a date range
The calculator counts every Monday to Friday from the start date to the end date, including both dates when they are weekdays, subtracts any weekday public holidays you enter and multiplies the remaining working days by your daily hours.
A full-time employee's maximum ordinary hours under the National Employment Standards are 38 a week, which is 7.6 hours over five days. Change the daily hours for part-time work, a different agreement or a project's billable day.
Public holidays and part days
Public holidays differ between states and territories and some fall on weekends, so enter only the holidays that fall on a weekday in your range. The calculator does not look up holiday dates automatically.
Rostered days off, leave, overtime and part days are not modelled. Adjust the result for those, and confirm actual entitlements and hours with your award, enterprise agreement or employment contract.
Official sources and assumptions
Check the official or authoritative references used to review this calculator's rates, formulas and assumptions.
Frequently asked questions
Does it account for public holidays?
Yes. Enter the number of public holidays that fall on a weekday in the range; they are subtracted from the working-day count. Holiday dates vary by state and territory.
What if I work part-time hours?
Set the daily hours field to whatever your standard working day length is, including part-time hours.
Does this include weekends?
No, only Monday-to-Friday business days are counted, consistent with the working-week assumption used across the site.
Content responsibility
Maintained by CalcAussie and last updated 15 October 2026. Checks applied: calculation method, worked examples, Australian terminology, material assumptions, official references where an external rule applies, and user-facing limitations.
Calculator results remain estimates based on the figures entered. Check material decisions against current official information and report a suspected error so it can be reproduced and corrected.