Work Hours Calculator

Track your work hours, breaks, and overtime with ease

Time Entry

Quick Break:

Today's Summary

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0:00
Total Work Hours
0:00
Gross Hours
0:00
Break Time
0:00
Regular
0:00
Overtime

Keyboard Shortcuts

Enter Calculate Ctrl+S Add Entry Ctrl+C Copy Results Esc Clear Form

Timesheet Entries

Date Clock In Clock Out Break Net Hours Overtime Actions

No entries yet. Add your first time entry above.

How It Works

This calculator computes your net working hours by taking your clock-in and clock-out times and subtracting any break periods.

Net Hours = (Clock Out - Clock In) - Break Duration

Overtime is automatically calculated when your daily hours exceed your standard workday setting, or when weekly hours exceed your weekly limit.

Tips for Best Results

  • Log your hours at the end of each workday for accuracy
  • Include all break times, even short coffee breaks add up
  • Use the quick-entry buttons for common start times
  • Export your timesheet weekly for your records
  • Set realistic overtime thresholds based on your contract

Common Mistakes to Avoid

  • Forgetting to log unpaid lunch breaks
  • Not accounting for time zone differences when remote
  • Rounding times instead of using exact values
  • Mixing 12-hour and 24-hour formats
  • Not saving entries before closing the browser

Your Data is Private

All calculations happen locally in your browser. Your time entries are stored only on your device using localStorage. We never send your work data to any server.

To keep your data safe, regularly export your timesheet and store backups in a secure location.

This calculator is for informational and personal tracking purposes only. It does not constitute legal, financial, or employment advice. Always verify overtime calculations with your employer and consult local labor laws.

Frequently Asked Questions

Find answers to common questions about tracking work hours

For shifts that cross midnight (like 10 PM to 6 AM), the calculator automatically detects when the clock-out time is earlier than the clock-in time and adds 24 hours to give you the correct duration. Simply enter your times as you would normally, and the calculation handles the date change automatically.
This calculator tracks overtime using customizable daily and weekly thresholds. The default settings (8 hours/day, 40 hours/week) are common standards, but actual overtime rules vary by jurisdiction. In the US, federal law (FLSA) requires overtime pay only for hours exceeding 40 per week, while some states like California also mandate daily overtime. Check your local labor laws and employment contract for specific requirements.
Currently, the calculator supports one break period per entry. If you take multiple breaks, you can either combine them into a single break duration (e.g., 30 min lunch + 15 min coffee = 45 min total break), or create separate entries for each work segment. Use the quick break buttons for common durations.
Yes! All your entries are automatically saved to your browser's local storage. They will persist even after closing the browser or restarting your computer. However, clearing your browser data will remove saved entries, so we recommend exporting your timesheet regularly using the "Export CSV" button for backup.
Gross hours is the total time between clock-in and clock-out, including any breaks. Net hours (also called "actual work hours") is your gross hours minus break time — this represents the time you were actively working. Net hours are typically used for payroll calculations. Note: "Billable hours" is a separate concept used by professionals to track time charged to clients, which may differ from net hours.
Yes! This calculator is fully responsive and works great on smartphones and tablets. The interface automatically adjusts to smaller screens. You can even add this page to your home screen for quick access. Your entries are stored locally on each device, so remember to export and import if you switch between devices.
Each entry in your timesheet has action buttons on the right side. Click the edit (pencil) icon to load that entry's values back into the form for modification, then add it again. Click the delete (trash) icon to remove an entry. You can also use "Clear All" to remove all entries at once.
The calculator exports to CSV (Comma-Separated Values) format, which is widely compatible with spreadsheet applications like Excel, Google Sheets, and Numbers. This format preserves all your data including dates, times, breaks, and calculated hours. You can open the exported file in any spreadsheet software for further analysis or record-keeping.
This calculator uses local times as entered. For remote teams across time zones, each person should enter times in their local time zone. The duration calculation will still be accurate since it's based on the difference between clock-in and clock-out. For comparing schedules across zones, consider using our Time Zone Calculator tool.
Manual time calculations are prone to errors, especially with break deductions and overtime. This calculator ensures accuracy, automatically handles complex scenarios like midnight crossovers, maintains a history of all entries, and provides instant summaries. It saves time and reduces the mental load of tracking work hours accurately.

Important Disclaimer

This calculator is for informational and personal tracking purposes only. It does not constitute legal, financial, or employment advice.

Overtime rules, break requirements, and work hour regulations vary significantly by jurisdiction, industry, and employer. In the United States, federal law (FLSA) requires overtime pay for hours exceeding 40 per week, but some states have additional daily overtime requirements.

Always verify calculations with your employer's policies, employment contract, and applicable local labor laws. For questions about your specific rights or obligations, consult with a qualified employment attorney or your local Department of Labor.

The calculations provided by this tool are based on the times you enter and standard arithmetic. We make no guarantees about the accuracy of results or their suitability for any particular purpose.

Resources & References

This calculator and its educational content are based on information from authoritative sources. We've compiled these references to help you learn more about work hour tracking, overtime regulations, and best practices.

Labor Law & Regulations

Time Tracking Best Practices

Technical Documentation

Additional Resources