Calculate your work hours, break deductions, weekly totals, decimal hours, overtime, and estimated gross pay with this free Work Hours Calculator. It is useful for employees, freelancers, contractors, shift workers, students, managers, and anyone who needs to track working time accurately.
Use the calculator below to enter your start time, end time, break duration, overnight shift details, hourly rate, and weekly schedule.
Work Hours Calculator Tool
Weekly Work Hours Calculator
| Day | Start time | End time | Break minutes | Overnight | Daily total hours | Daily decimal hours | Daily gross pay |
|---|---|---|---|---|---|---|---|
| Monday | 0 hours 0 minutes | 0.00 | 0.00 | ||||
| Tuesday | 0 hours 0 minutes | 0.00 | 0.00 | ||||
| Wednesday | 0 hours 0 minutes | 0.00 | 0.00 | ||||
| Thursday | 0 hours 0 minutes | 0.00 | 0.00 | ||||
| Friday | 0 hours 0 minutes | 0.00 | 0.00 | ||||
| Saturday | 0 hours 0 minutes | 0.00 | 0.00 | ||||
| Sunday | 0 hours 0 minutes | 0.00 | 0.00 |
Overtime Helper
Common Work Hours Examples
| Start | End | Break | Decimal hours |
|---|---|---|---|
| 09:00 | 17:00 | 30 min | 7.50 hours |
| 09:00 | 17:30 | 30 min | 8.00 hours |
| 08:00 | 16:00 | 60 min | 7.00 hours |
| 22:00 | 06:00 | 30 min | 7.50 hours |
| 10:00 | 18:00 | 0 min | 8.00 hours |
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“Results are estimates for general planning only. For payroll, tax, employment, overtime, or legal decisions, always check official records, workplace policy, or speak to a qualified professional.”
A Work Hours Calculator helps you calculate how many hours you worked between a start time and an end time. It can also deduct unpaid breaks, convert worked time into decimal hours, estimate gross pay, and total your weekly work schedule.
This is useful when you need to prepare a timesheet, check your work log, estimate wages, calculate freelance billing time, or understand your weekly working hours.
How to Calculate Work Hours
To calculate work hours, subtract the start time from the end time, then deduct any unpaid break time.
Example:
Start time: 09:00
End time: 17:30
Break: 30 minutes
Total shift length: 8 hours 30 minutes
After break: 8 hours
Decimal hours: 8.00
So, if you worked from 09:00 to 17:30 with a 30-minute break, your total worked time is 8 hours.
Work Hours Formula
The basic formula is:
Work Hours = End Time − Start Time − Break Time
If you need decimal hours for payroll or billing, divide the worked minutes by 60.
Decimal Hours = Worked Minutes ÷ 60
For example:
480 minutes ÷ 60 = 8.00 decimal hours
Common Work Hours Examples
| Shift Time | Break | Total Worked Time | Decimal Hours |
|---|---|---|---|
| 09:00 to 17:00 | 30 minutes | 7 hours 30 minutes | 7.50 |
| 09:00 to 17:30 | 30 minutes | 8 hours | 8.00 |
| 08:00 to 16:00 | 60 minutes | 7 hours | 7.00 |
| 22:00 to 06:00 | 30 minutes | 7 hours 30 minutes | 7.50 |
| 10:00 to 18:00 | 0 minutes | 8 hours | 8.00 |
These examples are helpful for checking common daily shifts, part-time work, overnight work, and standard office hours.
Why Work Hours Are Often Shown as Decimal Hours
Many payroll systems, invoices, and timesheets use decimal hours instead of hours and minutes.
For example:
7 hours 30 minutes = 7.50 decimal hours
8 hours 15 minutes = 8.25 decimal hours
8 hours 45 minutes = 8.75 decimal hours
This matters because entering 7 hours 30 minutes as 7.30 can create an incorrect payroll or billing result. The correct decimal format is 7.50.
Work Hours and Break Time
Break time should be deducted if it is unpaid. For example, if your shift is 8 hours long and you take a 30-minute unpaid break, your paid work time is 7 hours 30 minutes.
Example:
Start time: 09:00
End time: 17:00
Break: 30 minutes
Total time at work: 8 hours
Paid working time: 7 hours 30 minutes
Decimal hours: 7.50
If your break is paid, you may not need to deduct it. Always check your workplace policy or employment agreement.
Weekly Work Hours Calculator
The weekly work hours section helps you calculate your total hours from Monday to Sunday. You can enter a different start time, end time, break duration, and overnight shift option for each day.
This is useful for:
- Weekly timesheets
- Part-time job hours
- Full-time work schedules
- Shift work
- Freelance billing
- Contractor work logs
- Overtime estimates
- Payroll preparation
The calculator totals your weekly hours and gives a decimal hour result, which can be useful for payroll and wage estimates.
Work Hours and Pay Estimate
This calculator can also estimate gross pay by multiplying your decimal hours by your hourly rate.
Formula:
Decimal Hours × Hourly Rate = Gross Pay
Example:
8.00 hours × £15 per hour = £120 gross pay
For weekly pay:
40.00 hours × £15 per hour = £600 gross pay
This is only a basic gross pay estimate. It does not include tax, pension, national insurance, deductions, holiday pay, bonuses, overtime rules, or employer-specific adjustments.
Overnight Shift Calculation
An overnight shift starts on one day and ends the next day. For example:
Start: 22:00
End: 06:00
Break: 30 minutes
Total shift length: 8 hours
After break: 7 hours 30 minutes
Decimal hours: 7.50
Use the overnight option when your end time is earlier than your start time because the shift crosses midnight.
Overtime Hours
Overtime usually means hours worked above a standard weekly amount, such as 40 hours. Some workplaces use different overtime rules, so this calculator gives a general estimate only.
Example:
Weekly hours: 45
Standard hours: 40
Overtime hours: 5
If your normal hourly rate is £15 and overtime multiplier is 1.5, the overtime rate would be £22.50 per hour.
Who Can Use This Work Hours Calculator?
This calculator is useful for many situations, including:
- Employees checking hours before payday
- Freelancers calculating billable time
- Contractors preparing invoices
- Managers reviewing shift totals
- Students working part-time
- Night shift workers
- Remote workers tracking daily time
- Anyone preparing a weekly timesheet
It is designed for quick estimates and everyday planning.
Work Hours vs Time Duration
A work hours calculator is mainly used for shifts, breaks, weekly totals, and pay estimates.
A time duration calculator is more general and can calculate the time between two dates or times for different purposes.
For work, payroll, and timesheets, this Work Hours Calculator is usually the better option.
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You may also find these tools useful:
Time to Decimal Calculator
Time Duration Calculator
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Frequently Asked Questions
How do I calculate my work hours?
Subtract your start time from your end time, then deduct any unpaid break time. For example, 09:00 to 17:30 with a 30-minute break equals 8 hours worked.
How many hours is 09:00 to 17:00 with a 30-minute break?
09:00 to 17:00 is 8 hours. After deducting a 30-minute break, the total worked time is 7 hours 30 minutes, or 7.50 decimal hours.
How many hours is 09:00 to 17:30 with a 30-minute break?
09:00 to 17:30 is 8 hours 30 minutes. After deducting a 30-minute break, the total worked time is 8 hours, or 8.00 decimal hours.
What is 7 hours 30 minutes in decimal hours?
7 hours 30 minutes is 7.50 decimal hours. This is because 30 minutes is half of one hour.
What is 8 hours 45 minutes in decimal hours?
8 hours 45 minutes is 8.75 decimal hours because 45 minutes equals 0.75 of an hour.
Can this calculator deduct breaks?
Yes. Enter your break duration in minutes, and the calculator deducts it from your total shift time.
Can this calculator calculate overnight shifts?
Yes. Use the overnight shift option if your shift starts on one day and ends the next day, such as 22:00 to 06:00.
Can I calculate weekly work hours?
Yes. The weekly section lets you enter Monday to Sunday work times and calculates total weekly hours, decimal hours, and estimated gross pay.
How do I calculate pay from work hours?
Convert your work time into decimal hours, then multiply by your hourly rate. For example, 8.00 hours × £15 = £120 gross pay.
Is this calculator suitable for official payroll?
This calculator gives general estimates. For official payroll, tax, overtime, employment, or legal decisions, always check your official records, workplace policy, or speak to a qualified professional.
Disclaimer
This Work Hours Calculator is for general planning and estimation only. Results may vary depending on workplace rules, payroll systems, overtime policies, paid or unpaid breaks, deductions, tax rules, employment contracts, and local regulations. Always check your official timesheet, payslip, employment agreement, workplace policy, or payroll provider before making financial or employment decisions.