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Work Hours Calculator

Calculate work hours, break deductions, overtime, weekly totals, and overnight shifts instantly online.

Updated

What is the Work Hours Calculator?

The Work Hours Calculator helps you quickly calculate the total number of hours worked between a start and end time. Whether you are tracking employee attendance, managing shifts, preparing payroll, calculating overtime, or simply monitoring your own working hours, this tool provides fast and accurate results.

Unlike basic time calculators, this calculator supports break deductions, overnight shifts that cross midnight, weekly hour projections, and overtime estimates. This makes it useful for employees, freelancers, contractors, HR professionals, managers, and business owners.

Simply enter your start time, end time, break duration, and workdays per week to instantly see your daily hours worked, total minutes, weekly hours, regular hours, and overtime hours.

All calculations happen directly in your browser, ensuring your data remains private and secure.

How it works

The calculator determines the total worked time by measuring the difference between your start time and end time.

Step 1: Enter Your Shift Times

Provide the time you started work and the time you finished work.

Examples:

  • 09:00 to 17:00
  • 08:30 to 18:00
  • 22:00 to 06:00 (overnight shift)

Step 2: Enter Break Time

Add any unpaid break duration in minutes. Common examples include:

  • 30-minute lunch break
  • 60-minute lunch break
  • Multiple breaks combined

The calculator subtracts break time from the total shift duration.

Step 3: Calculate Daily Hours

The tool automatically calculates:

  • Total worked minutes
  • Total worked hours
  • Decimal hours for payroll and reporting

Step 4: Estimate Weekly Hours

Enter the number of workdays per week to project your weekly working hours.

For example:

  • 8 hours per day × 5 days = 40 weekly hours
  • 10 hours per day × 6 days = 60 weekly hours

Step 5: Calculate Overtime

The calculator compares your projected weekly hours against a standard 40-hour workweek and estimates overtime hours.

Overnight Shift Support

Many employees work overnight shifts where the end time occurs on the following day.

Example:

  • Start: 10:00 PM
  • End: 6:00 AM

The calculator automatically detects and correctly calculates these shifts without requiring any additional settings.

Common Uses

  • Employee timesheets
  • Payroll preparation
  • Attendance tracking
  • Shift planning
  • Freelance hour tracking
  • Overtime calculations
  • Workforce management
  • Contractor billing

Examples

Standard 8-Hour Workday

Calculate hours worked including a lunch break.

Start: 09:00, End: 18:00, Break: 60 minutes
 
8.00 hours worked

Overnight Shift

Calculate hours for a shift crossing midnight.

Start: 22:00, End: 06:00, Break: 30 minutes
 
7.50 hours worked

Weekly Hours Projection

Estimate weekly hours based on a daily schedule.

8 hours/day, 5 workdays
 
40.00 weekly hours

Frequently asked questions

What is a work hours calculator?

A work hours calculator is a tool that calculates the total amount of time worked between a start and end time. It can also deduct breaks, estimate weekly hours, and calculate overtime.

How do I calculate my work hours?

Enter your start time, end time, and any unpaid break duration. The calculator subtracts break time and shows your total worked hours instantly.

Can this calculator handle overnight shifts?

Yes. If your shift starts on one day and ends after midnight, the calculator automatically accounts for the overnight period and provides accurate results.

Does the calculator subtract lunch breaks?

Yes. You can enter the total break duration in minutes, and the calculator will deduct it from your worked time.

How are overtime hours calculated?

The calculator estimates overtime by comparing your projected weekly hours against a standard 40-hour workweek. Any hours above 40 are considered overtime.

Can I use this calculator for payroll calculations?

Yes. The calculator provides accurate worked hours and decimal hours that can be used for payroll preparation and employee time tracking.

Is this work hours calculator free?

Yes. You can use the calculator online for free without creating an account or installing any software.

Can freelancers use this calculator?

Absolutely. Freelancers, consultants, contractors, and remote workers can use it to track billable hours and project time.

How do I calculate weekly work hours?

Enter your daily shift details and the number of workdays per week. The calculator will estimate your total weekly hours automatically.

Does the calculator store my information?

No. All calculations are performed locally in your browser, and your work schedule data is not stored or transmitted anywhere.

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