How do I calculate overnight shift hours?

If your shift crosses midnight (e.g., 10 PM to 6 AM), the calculator detects that the end time is earlier than the start time and adds 24 hours (1,440 minutes) to the gross time. This gives the correct duration for overnight shifts.

What are decimal hours?

Decimal hours express time as a decimal fraction of an hour. For example, 7 hours and 30 minutes = 7.5 decimal hours, and 7 hours 45 minutes = 7.75. Most payroll systems use decimal hours for wage calculation: hours × rate = pay.

Should I include paid breaks?

It depends on your purpose. For payroll calculation, only subtract unpaid breaks (typically meal breaks). Paid rest breaks (usually 10–15 minutes) are counted as work time. Check your company policy or labor law.

How do I handle multiple breaks?

Add up all break minutes before entering the total. For example, a 30-minute lunch and two 15-minute rest breaks = 60 minutes total. Only enter unpaid breaks if calculating for payroll purposes.

What is the minimum break time required by law?

It varies by jurisdiction. In the US, federal law does not require meal breaks, but most states mandate 30 minutes for shifts over 5–6 hours. The EU Working Time Directive requires a rest break after 6 hours. Always check local labor laws.

How do I calculate weekly hours?

Calculate each day's net hours and add them together. You can use the Time Duration Calculator to sum multiple daily durations. Most full-time positions in the US are 40 hours per week before overtime kicks in.

Work Hours Calculator

Calculate total work hours between clock-in and clock-out times minus breaks. Enter start time, end time, and break duration to get net hours.

Clock In

Hour (0-23)

Minute (0-59)

Clock Out

Hour (0-23)

Minute (0-59)

Break Time

min

Hourly Rate

Net Work Time

8:00

8 decimal hours

Daily Pay

$200.00

@ $25.00/hr

Weekly Pay (5 days)

$1,000.00

Monday–Friday

Bi-weekly Pay

$2,000.00

10 working days

Monthly Pay (est)

$4,166.00

≈ 20.83 days

Annual Pay (est)

$52,000.00

260 working days/year

Time Breakdown

Regular

Gross Clock Time

8.8 hrs

525 minutes

Break Time

45 min

Unpaid

Net Work Time

8h 0m

Regular shift

Planning notes, formulas, and examples

About the Work Hours Calculator

The Work Hours Calculator determines net work hours by subtracting break time from the total time between clock-in and clock-out. For employees and managers, accurately calculating daily work hours is essential for payroll, compliance with labor laws, and personal time management.

Simply subtracting clock-in from clock-out gives gross hours, but net work hours must account for meal breaks, rest breaks, and any other non-work periods. This calculator takes your start time (in 24-hour format), end time, and total break minutes to give you the exact net hours worked.

The result is displayed in both HH:MM format and decimal hours. Decimal hours (e.g., 7.75 instead of 7:45) are commonly used in payroll systems for calculating wages. This calculator supports both same-day shifts and overnight shifts that cross midnight.

When This Page Helps

Manually calculating work hours with breaks gets messy fast, especially for overnight shifts. This calculator gives you net hours in both time and decimal formats for accurate payroll, timesheet, and compliance reporting.

How to Use the Inputs

Enter your clock-in time as hours and minutes (24-hour format).
Enter your clock-out time as hours and minutes.
Enter total break time in minutes (lunch, rest breaks, etc.).
View net work hours in HH:MM and decimal format.
Use the decimal hours for payroll calculations.

Formula used

Gross Minutes = (end_hour × 60 + end_min) − (start_hour × 60 + start_min)
If Gross Minutes < 0, add 1440 (overnight shift).
Net Minutes = Gross Minutes − Break Minutes
Net Hours = Net Minutes / 60

Example Calculation

Result: 8:00 (8.00 decimal hours)

Clock in at 08:30, clock out at 17:15. Gross time = 8 hours 45 minutes (525 minutes). Subtract 45 minutes of breaks. Net work time = 480 minutes = 8 hours exactly = 8.00 decimal hours.

Tips & Best Practices

Use 24-hour format: 1:00 PM = 13:00, 5:30 PM = 17:30.
Include all breaks: lunch, coffee, and mandated rest periods.
For overtime calculation, first determine regular hours, then apply overtime rate.
Many jurisdictions require 30-minute meal breaks for shifts over 5–6 hours.
Decimal hours simplify wage calculation: hours × hourly rate = daily pay.
For overnight shifts, the calculator automatically adds 24 hours when end time < start time.

Payroll and Compliance

Accurate work hours tracking is the foundation of payroll processing. Undercounting hours shortchanges employees; overcounting inflates costs. Labor regulations like the US Fair Labor Standards Act (FLSA) and EU Working Time Directive set strict rules about maximum hours, mandatory breaks, and overtime thresholds.

Decimal Hours in Practice

Most payroll software uses decimal hours for calculation simplicity. When you see 40.25 hours on a timesheet, that means 40 hours and 15 minutes. Many companies round time entries to the nearest 6 minutes (0.1 hours) or 15 minutes (0.25 hours) for administrative ease.

Overtime Considerations

After calculating regular hours, overtime rules determine additional compensation. In the US, non-exempt employees earn 1.5× their hourly rate for hours beyond 40 per week (federal rule). Some states also require daily overtime beyond 8 or 10 hours. Accurate hour tracking is the first step in correct overtime calculation.

Sources & Methodology

Last updated: February 8, 2026

Frequently Asked Questions

If your shift crosses midnight (e.g., 10 PM to 6 AM), the calculator detects that the end time is earlier than the start time and adds 24 hours (1,440 minutes) to the gross time. This gives the correct duration for overnight shifts.