Working Hours Between Dates Calculator
Estimate total working hours between two dates based on your standard business hours per weekday, useful for project and billing estimates.
Your results
Calculation breakdown
- Working days
- Weekdays between dates − public holidays
- Working hours
- Working days × daily hours
Worked example
A 4-week project (20 weekdays, 1 public holiday) at 7.6 hours a day gives 19 working days, or 144.4 working hours.
Assumptions
- Only Monday-to-Friday is treated as a working day.
- Part days such as rostered days off 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.
Frequently asked questions
Does it account for public holidays?
You can enter an estimated number of public holidays in the range to subtract from the working day count.
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.
Editorial review and responsibility
Reviewed by the CalcAussie editorial team on 21 September 2026. Review scope: Method, Australian terminology, material assumptions, source links 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.