Work Hours Calculator
Enter your start time, end time and break duration to calculate total work hours, overtime and gross pay.
Reviewed by the ToolNestr Editorial Team — July 2026
Work hours distribution
Employee
Track your daily work hours and calculate gross pay including overtime. Verify your timesheet matches your expected earnings.
Freelancer
Bill clients accurately by calculating hours worked per project. Set your hourly rate and see earnings for each session.
HR Manager
Quickly verify employee timesheets and estimate labor costs. Useful for payroll preprocessing and overtime audit.
Small Business Owner
Calculate employee hours and payroll costs for your team. Plan staffing budgets and understand labor expenses.
Standard work hours by country
| Country | Standard Day | Standard Week | Overtime Rate |
|---|---|---|---|
| United States | 8 h | 40 h | 1.5x (FLSA) |
| United Kingdom | 8 h | 48 h max | 1.5x (varies) |
| France | 7 h | 35 h | 1.25x - 1.5x |
| Germany | 8 h | 48 h max | 1.5x (varies) |
| Japan | 8 h | 40 h | 1.25x - 1.5x |
| Australia | 7.6 h | 38 h | 1.5x - 2x |
| India | 9 h | 48 h | 2x |
How work hours are calculated
Work hours are calculated by subtracting the start time from the end time to get the total elapsed time, then subtracting any unpaid break duration. The result is the net paid hours for the shift. If the shift crosses midnight, the calculator adds 24 hours to the end time before subtracting.
Worked example
How to use the work hours calculator
Enter shift details
Select the date and enter your start and end times in any format.
Set break and pay
Enter break duration in minutes, your hourly rate, and overtime threshold.
Review results
See total hours, overtime, break deduction, and calculated pay amounts instantly.
Work hours tips
Always account for breaks
Unpaid meal breaks reduce your total paid hours. Forgetting to deduct breaks can lead to overestimating your pay by 30+ minutes per shift.
Check overtime thresholds
Overtime rules vary by jurisdiction. Some places use 8 hours per day, others use 40 hours per week. Verify your local labor laws for accurate calculations.
Time rounding
Many employers round time to the nearest 15-minute increment. This calculator shows exact minutes, but your actual pay may use rounding rules.
Standard work hours
Standard work hours vary globally. The traditional 9-to-5, 8-hour workday originated from the labor movement in the late 19th century. Today, most developed countries have a standard work week of 35-40 hours, with overtime pay required for hours worked beyond the standard threshold.
Overtime rules
Overtime rules differ by country. In the US, the Fair Labor Standards Act (FLSA) requires overtime at 1.5x the regular rate for hours over 40 per week. In the EU, the Working Time Directive caps weekly work at 48 hours. Many countries have daily overtime thresholds in addition to weekly limits.
Break requirements by jurisdiction
Break requirements vary widely. In the US, federal law does not mandate meal breaks, but many states require a 30-minute meal break for shifts over 6 hours. The EU mandates a 20-minute break for shifts over 6 hours. Most countries distinguish between rest breaks (paid, short) and meal breaks (unpaid, longer).
When to use the work hours calculator
The work hours calculator is useful in many professional and personal scenarios. Employees use it to verify their timesheets match their expected hours and pay. A common example: an employee working 9:00 AM to 6:00 PM with a 1-hour unpaid lunch break should record 8 hours of paid time. Entering these values into the calculator confirms the total and computes gross pay based on the hourly rate.
Freelancers and contractors can use this tool to bill clients accurately per session. For instance, a freelance graphic designer working 10:00 AM to 3:30 PM with no break logs 5.5 billable hours. At a rate of $50 per hour, that session generates $275. Tracking these sessions helps freelancers produce accurate invoices without manual arithmetic errors.
Small business owners and HR managers use work hour calculations for payroll preprocessing. A restaurant manager scheduling staff from 11:00 AM to 10:00 PM with staggered breaks needs to verify that each employee's net hours comply with labor regulations. The calculator provides instant verification, making it easier to spot discrepancies before payroll processing.
The tool also helps with shift planning and labor cost estimation. A retail store manager planning holiday coverage can enter hypothetical shift times and hourly rates to estimate total labor costs for the day. This allows for data-driven staffing decisions that stay within budget while ensuring adequate coverage.
Limitations and considerations
While the work hours calculator provides accurate results for single shifts, there are several limitations to keep in mind. First, the calculator handles one shift at a time. For weekly or monthly totals, you need to add up individual shift results manually or use a spreadsheet. This can be time-consuming for employees with irregular schedules who work different hours each day.
Second, the overtime calculation uses a simple daily threshold model. Many real-world overtime rules are more complex. Some jurisdictions use a weekly overtime threshold of 40 hours per week rather than a daily one. Others use a blended rate or require double time for hours beyond a certain limit. The calculator does not account for weekly overtime accumulation, different overtime rates for weekends or holidays, or state-specific overtime laws like California's daily overtime rules.
Third, time rounding is not reflected in the results. Many employers round clock-in and clock-out times to the nearest 15-minute interval using the quarter-hour rule. The calculator shows exact minutes, so your actual paid hours may differ slightly from what is shown here. Check with your employer's timekeeping policy to understand how rounding is applied.
Fourth, the calculator does not handle split shifts involving a morning shift and an evening shift on the same day, multiple pay rates for different tasks, or deductions beyond breaks such as taxes, insurance, or retirement contributions. For comprehensive payroll processing, dedicated payroll software is recommended.
Frequently asked questions
How do I calculate work hours?
Subtract your start time from your end time, then subtract any unpaid break duration. The result is your total work hours for that shift.
What is overtime?
Overtime is any time worked beyond the standard work threshold (typically 8 hours per day or 40 hours per week). It is often paid at a higher rate, commonly 1.5x the regular hourly rate.
How is overtime calculated?
Overtime pay = overtime hours × overtime rate × regular hourly rate. For example, 2 overtime hours at 1.5x rate with $20/hr = 2 × 1.5 × $20 = $60.
What is the standard work day?
The standard work day varies by country. In the US it is typically 8 hours, in many European countries it is 7-8 hours, and in some Asian countries it can be 8-9 hours.
Are breaks paid or unpaid?
This depends on jurisdiction and employer policy. In the US, short breaks (under 20 minutes) are typically paid, while meal breaks (30+ minutes) are often unpaid. Always check local labor laws.
What if I work past midnight?
If your shift crosses midnight (e.g., 11 PM to 7 AM), the calculator handles it automatically. Enter the times as they appear on a 24-hour clock.
What time format should I use?
Use 12-hour or 24-hour format. The calculator accepts both. For 12-hour format, make sure to specify AM or PM correctly.
Can I calculate weekly totals?
This calculator handles a single shift at a time. For weekly totals, add up the daily results or use a spreadsheet for multiple shifts.
Is my data saved anywhere?
No. All calculations happen entirely in your browser. Nothing is sent to any server or stored.
What is the minimum wage?
Minimum wage varies by country and region. This calculator does not enforce minimum wage — enter the rate agreed upon with your employer.