Work Hours Calculator

Hours Calculator

A weekly timesheet: enter start time, end time, and unpaid break for each day to get hours worked per day, weekly total, decimal hours for payroll, and gross pay.

100% FreeBreak DeductionGross Pay & Overtime

Weekly Timesheet

Leave a day blank if you didn't work; night shifts that cross midnight are handled automatically

Day	Start	End	Break (min)	Hours
Monday				7 h 30 min
Tuesday				7 h 30 min
Wednesday				7 h 30 min
Thursday				7 h 30 min
Friday				7 h 30 min
Saturday				—
Sunday				—

Hourly rate (optional, $)

Weekly Total

37 h 30 min

37.50 decimal hours

How to Calculate Hours Worked (With a Worked Example)

The standard time-card method has three steps: (1) convert clock-in and clock-out to elapsed time, (2) subtract unpaid breaks, (3) sum the days with base-60 carrying. Example week: Monday–Thursday 8:30 AM–5:00 PM with a 30-minute lunch (8 h each), Friday 8:30 AM–1:30 PM with no lunch (5 h). Total: 4 × 8 + 5 = 37 hours = 37.00 decimal hours; at $20/hour that's $740 gross.

Common Work Schedules and Their Weekly Hours

Schedule	Hours per day	Hours per week	Decimal
9–5, no lunch deduction	8 h	40 h	40.00 h
9–5 with 30-min lunch	7 h 30 min	37 h 30 min	37.50 h
9–5:30 with 1-h lunch	7 h 30 min	37 h 30 min	37.50 h
8–4:30 with 30-min lunch	8 h	40 h	40.00 h
4 × 10-h shifts (4/10)	10 h	40 h	40.00 h
3 × 12-h shifts (nursing)	12 h	36 h	36.00 h

A “full-time” US job is typically 40 hours; the common European standard is 35–38 hours.

Decimal Hours, Rounding, and Payroll Rules

Payroll systems multiply decimal hours by the wage, so 7 h 45 min is entered as 7.75, not 7.45. US employers may round punches to the nearest quarter hour (the “7-minute rule”: 7:53–8:07 rounds to 8:00) as long as rounding doesn't systematically favor the employer. If your paycheck seems short, compare your own time-card total from this calculator against the payroll statement — punch-rounding and missed break deductions are the two most common discrepancies.

Frequently Asked Questions

How do I calculate hours worked in a day?

Subtract the clock-in time from the clock-out time, then subtract unpaid breaks. Working 8:45 AM to 5:15 PM with a 45-minute lunch: elapsed time is 8 h 30 min, minus 0 h 45 min = 7 h 45 min payable — 7.75 decimal hours.

How do I total a week of timesheet hours?

Add each day's hours and minutes separately, then carry every 60 minutes into an hour. Five days of 7 h 45 min = 35 h 225 min = 38 h 45 min. Entering each day above does the carrying automatically.

What is 7.75 hours in hours and minutes?

Multiply the decimal part by 60: 0.75 × 60 = 45, so 7.75 hours = 7 h 45 min. Payroll uses decimal hours because wages multiply cleanly: 7.75 h × $18/h = $139.50.

When does overtime start?

Under the US federal FLSA, non-exempt employees earn at least 1.5× their regular rate for hours beyond 40 in a workweek. Some states add daily rules — California pays overtime after 8 hours in a single day. This calculator flags weekly hours over 40; check state law for daily thresholds.

How are night shifts that cross midnight counted?

If the end time is earlier than the start time, the shift wraps to the next day: 11:00 PM to 7:00 AM is 8 hours. The calculator adds 24 hours automatically, matching standard time-card conventions.

Are lunch breaks paid or unpaid?

In the US, bona fide meal periods (typically 30+ minutes, fully relieved of duty) are usually unpaid, while short rest breaks of 5–20 minutes are paid working time under the FLSA. Only enter unpaid breaks in the break column.

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