Clock-in and clock-out math, unpaid breaks, decimal hours and weekly time-card totals. Use the calculators for your own numbers and the guides for formulas, examples and common questions.
Use the tool that matches the exact problem you need to solve.
Calculate weekly work hours and gross pay from daily clock-in, clock-out and unpaid break times.
Calculate paid work hours from start time, end time and an unpaid break.
Find elapsed hours and minutes between two clock times, including overnight intervals.
Find elapsed time between a start time and end time, including overnight periods.
Convert decimal hours to hours and minutes.
Convert hours and minutes into decimal hours for timesheets and payroll calculations.
38 focused guides and worked examples for this calculator cluster.
8:00 AM to 4:30 PM is 8.5 elapsed hours. Subtract a 30-minute unpaid lunch and paid time is exactly 8 hours. Compare other lunch lengths.
Read guide →Work Hours & Time CardsLearn how a one-hour unpaid lunch changes common 8-to-5 and 9-to-6 schedules.
Read guide →Work Hours & Time CardsA 30-minute unpaid lunch equals 0.50 decimal hour. See how to subtract it correctly from a time card.
Read guide →Work Hours & Time CardsSee how lunch length affects the clock-in and clock-out times needed to reach 40 paid hours over five days.
Read guide →Work Hours & Time CardsA 45-minute unpaid lunch equals 0.75 decimal hour. See the conversion and time-card examples.
Read guide →Work Hours & Time CardsSee schedule examples that produce 7.5 paid hours and learn why 7 hours 30 minutes equals 7.50 decimal hours.
Read guide →Work Hours & Time CardsSee common clock-in, clock-out and lunch combinations that produce exactly 8 paid hours.
Read guide →Work Hours & Time Cards9:00 AM to 5:00 PM is 8 elapsed hours. Subtract a 30-minute unpaid lunch and paid time is 7.5 hours, or 7 hours 30 minutes.
Read guide →Work Hours & Time CardsConvert common minute values to decimal hours for payroll and time-card calculations.
Read guide →Work Hours & Time CardsLearn how to find elapsed hours between start and end times, including breaks and overnight shifts. See formulas and worked examples.
Read guide →Work Hours & Time CardsCalculate hours when a shift starts before midnight and ends the next day, including unpaid breaks.
Read guide →Work Hours & Time CardsLearn how to calculate work hours from clock-in and clock-out times, subtract unpaid breaks, convert minutes to decimal hours, and total a workweek.
Read guide →Work Hours & Time CardsLearn how to subtract unpaid lunch minutes from a shift and convert the result to decimal hours.
Read guide →Work Hours & Time CardsLearn how to convert payroll-style decimal hours such as 7.75 into 7 hours 45 minutes. See formulas, worked examples and related free calculators.
Read guide →Work Hours & Time CardsAdd all unpaid break minutes together, then subtract the total from elapsed work time.
Read guide →Work Hours & Time CardsUnderstand when lunch time is included in paid hours and how to calculate a schedule either way.
Read guide →Work Hours & Time CardsLearn how to subtract a 30-, 45- or 60-minute unpaid lunch from clock-in and clock-out times and convert the result to decimal hours.
Read guide →Work Hours & Time CardsQuick-reference chart for common work schedules, lunch lengths and paid decimal hours.
Read guide →Clock-in and clock-out math, unpaid breaks, decimal hours and weekly time-card totals. The pages in this cluster are intentionally connected: calculator pages handle the arithmetic, while the guides answer informational searches, show worked examples and explain how to interpret the result.
Use the examples as reference points, then open a calculator and substitute your own values. For decisions involving contracts, taxes, health, payroll rules, construction requirements or other high-stakes details, verify the real-world assumptions with an appropriate authoritative source.
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