date-time-tools
Working Hours Calculator
Enter start and end work times, subtract break minutes, and calculate gross time, net working time, decimal hours, and hours-minute breakdowns.
Tool workspace
The interactive tool requires JavaScript.
Instructions
Enter the total break minutes to subtract, such as a 60-minute lunch break.
For a shift that ends after midnight, enable the overnight option before calculating and reviewing the result.
Use this browser-local working hours calculator for timesheet checks, shift drafts, study logs, and project time notes. It does not upload input and does not provide labor-law, overtime, payroll, or company attendance advice.
Direct answer
A working hours calculator subtracts start time from end time, deducts break minutes, and returns gross minutes, net working minutes, decimal hours, and an hours-minutes breakdown. Overnight shifts must be enabled explicitly, and the result is a calculation aid, not labor-law or payroll guidance.
How to use this tool
- Enter the start work time and end work time.
- Enter the total break minutes to subtract, such as a 60-minute lunch break.
- For a shift that ends after midnight, enable the overnight option before calculating and reviewing the result.
How working hours are calculated
The tool calculates gross minutes from start to end, subtracts break minutes, then displays minutes, decimal hours, and an hours-minute breakdown for review or spreadsheet entry.
Handling overnight shifts
By default, the end time must be after the start time. For shifts such as 22:00 to 06:00, enable the overnight option so the end time is treated as the next day.
What the result does not include
The result does not apply labor law, overtime rates, payroll rules, attendance rounding, holidays, timezone conversion, daylight saving time, or company scheduling policy.
Frequently asked questions
Does the working hours calculator upload my input?
No. Start time, end time, and break minutes are calculated locally in the browser without accounts, databases, backend services, or external APIs.
How should I subtract breaks?
Enter the total break minutes to deduct, such as 60 for lunch or 90 for multiple breaks combined.
Can it calculate night shifts?
Yes. If the end time is earlier than the start time, enable the overnight shift option so the result treats the end time as the next day.
Can I use the result for payroll or overtime?
Treat it as a calculation aid only. Payroll, overtime, rounding, and attendance rules depend on local law and company policy.
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