Hours Calculator
Calculate total hours and minutes between two times, or sum multiple time entries for timesheets.
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How to use this calculator
- 1
Enter your start time (hours and minutes).
- 2
Enter your end time.
- 3
Enter break time in minutes to be deducted.
- 4
The result shows total hours worked in both H:MM and decimal format.
Frequently asked questions
What is decimal hours format?
Decimal hours express time as a single number. 8 hours 30 minutes = 8.50 hrs. Payroll and billing systems often use decimal hours. Multiply decimal hours by your hourly rate to get pay.
What if I work past midnight?
If your end time is before your start time, the calculator automatically adds 24 hours to handle overnight shifts.
How do I calculate weekly hours?
Calculate each day's hours separately, then add them. Most people work 40 hours per 5-day week = 8 hours/day average.
How do I convert 7.75 hours to hours and minutes?
0.75 hours × 60 = 45 minutes. So 7.75 hours = 7 hours 45 minutes.
Hours and time calculation for work
How to use the hours
Use this hours to otal hours and minutes between two times, or sum multiple time entries for timesheets. Enter your values above and get your result in seconds. The tool is free, works on all devices, and keeps your data private — nothing is stored or shared.
How the hours works
The hours calculator uses standard formulas used in scheduling, project planning, and deadline management. Enter your inputs, and the tool calculates the result instantly in your browser. No server-side processing means your data stays on your device. Results update in real time as you change inputs.
Decimal vs H:MM time formats
Payroll systems typically use decimal hours (8.5 hours) while humans think in H:MM (8:30). To convert: multiply the decimal minutes by 60. 8.75 hrs = 8h 45min. 7.33 hrs = 7h 20min. To convert back: divide minutes by 60.
Overtime calculation
Standard full-time work is 8 hours/day or 40 hours/week. Hours beyond that are overtime (typically paid at 1.5×). Weekly overtime: total weekly hours − 40. Daily overtime (in some jurisdictions): daily hours − 8. Always check local labour law.
Timesheet best practices
Log start and end times immediately — memory is unreliable. Include break time. Use decimal format for billing. Round to the nearest 6 minutes (0.1 hr) for professional services billing. Keep records for at least 3 years.
Hours: how it works
Date and time calculations underpin project planning, legal deadlines, contract management, and everyday scheduling. This tool handles the arithmetic automatically, accounting for leap years, time zones, and calendar edge cases.
Who uses this tool?
Project managers, solicitors, HR teams, and individuals use it to count days, plan around weekends, and verify contract dates — any situation where getting the timing right matters.
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Results are estimates for informational purposes only and do not constitute professional financial, medical, legal, or technical advice. Read full disclaimer →