Time is the raw material of every paycheck, yet most people estimate their hours instead of calculating them — and small errors compound. A 15-minute rounding difference each day is over 60 hours a year. Time calculators remove the guesswork: enter clock-in and clock-out times, subtract unpaid breaks, and get exact daily, weekly, monthly, and annual totals. They also handle the tricky cases automatically — overnight shifts that cross midnight, split shifts, and the 40-hour federal overtime threshold that splits regular hours from premium overtime hours. For hourly workers, precise time tracking is pay protection: at $20/hour, the difference between 39.5 and 40.5 hours is not one hour of pay, it is 0.5 regular hours plus 0.5 overtime hours at $30. For salaried workers, the same math reveals the true hourly rate and whether long weeks are quietly discounting the pay. Whether you are filling out a timesheet, checking a pay stub, or planning a schedule, calculate from your own records first.
From clock-in/out times to weekly totals — with breaks and overtime split out.
NEWTime CalculatorsDaily clock-in/out times and breaks totaled into weekly hours with overtime split.
End time minus start time minus breaks — simple until overnight shifts and rounding rules make mental math unreliable. The Work Hours Calculator takes clock-in and clock-out times, subtracts unpaid breaks, and splits regular hours from overtime past 40 automatically.
Time cards record the raw material of payroll — and the classic trouble spots are unpaid breaks never actually taken, rounding (employers may round to the nearest quarter hour but must do so neutrally), and off-the-clock work. Calculate from your own records with the Work Hours Calculator first, then compare against the pay stub. For overnight or rotating shifts, enter times as they happened — the calculator handles the midnight crossover.
Example 1: 9:00 AM to 5:00 PM with a 30-minute lunch = 7.5 hours/day, 37.5/week — under the overtime threshold, so no premium. Example 2: 8:00 AM to 6:00 PM with a 1-hour lunch = 9 hours/day, 45/week: 40 regular + 5 overtime hours. At $22/hour: 40 x $22 + 5 x $33 = $1,045 for the week.
For each day, subtract clock-in time from clock-out time and subtract unpaid breaks, then add the days together. Enter your times in the work-hours calculator and it totals everything, splitting regular and overtime hours at 40.
No. Unpaid meal periods (usually 30 minutes or more where you are fully relieved of duty) do not count. Paid breaks and short rest periods generally do count as work time.
Under federal law, non-exempt employees earn overtime after 40 hours in a single workweek. Some states are stricter: California also requires overtime after 8 hours in a day and double-time after 12.
On average, about 173 (2,080 annual hours divided by 12). A 40-hour week works out to 160-184 hours in a given month depending on how the weeks fall — payroll usually annualizes rather than counting exact days.
Divide minutes by 60. Fifteen minutes is 0.25 hours, 30 minutes is 0.5, and 45 minutes is 0.75. So 7 hours 30 minutes becomes 7.5 hours — the format most payroll systems use.