Work Hours Calculator
Track your total work hours across multiple days with break time deducted. Useful for freelancers invoicing by the hour, consultants tracking billable time, or anyone who needs an accurate weekly total.
How to use
- Enter your start time, end time, and how long you took for breaks for each day.
- Add as many days as you need with the Add Day button.
- Hit Calculate to see your total hours worked.
- Break time is automatically deducted from each day's total.
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Calculating work hours sounds trivial until you have multiple sessions across a day, need to subtract a lunch break, or work an overnight shift that crosses midnight. A 9:15 AM start with a 45-minute lunch ending at 6:30 PM gives 8 hours 30 minutes of billable time - slightly annoying to work out by hand, straightforward with the calculator.
The tool lets you add multiple sessions (useful if you split the day across different clients or take a longer afternoon break) and deducts break time to give you net work hours. The total is shown in hours:minutes and as a decimal (e.g. 8.5 hours) since billing often uses decimal hours.
Frequently Asked Questions
How do I handle overnight shifts (e.g. 10 PM to 6 AM)?
Enter 10:00 PM as start and 6:00 AM as end. The calculator detects when the end time is before the start and treats it as ending the next day, giving 8 hours.
Why is the decimal hours format useful?
Many payroll systems and invoicing tools require hours as decimals. 8 hours 30 minutes = 8.5 hours. 7 hours 45 minutes = 7.75 hours. The calculator shows both so you can copy whichever format your system needs.
Can I calculate overtime with this?
The total hours shown can be compared to your standard hours (e.g. 8 per day). Any excess is your overtime. The calculator does not automatically flag overtime - you compare the result against your threshold.