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Work Hours Calculators

By ·Software Engineer and Full-Stack Developer·Updated

For hours worked in a day, take clock-in from clock-out and remove the unpaid lunch. The work hours calculator does that for one day or many. Clock punches with overtime and pay go into the time card calculator. The weekly timesheet keeps one week saved in your browser, and the biweekly timesheet covers a two-week pay period. To fill a sheet in by hand, print the printable timesheet.

Daily hours

Hours between timesDuration between two clock times, including overnight. Break timeNet paid hours after lunch or unpaid breaks. Night shift hoursShifts that cross midnight, differential for all or set hours. Military timeConvert 24-hour time and subtract punches. Add time calculatorAdd or subtract hours and minutes from a clock time. Hours and minutes calculatorTotal a list of durations, like 7:45 + 8:20. Hours to decimal7:30 is 7.5 hours, for payroll.

Weekly cards

Work hoursSimple weekly total with CSV and print. No overtime split. Time cardUp to 4 punches a day, state overtime rules, rounding, CSV and print. Weekly timesheetSave the week in this browser, copy totals or download CSV. Biweekly timesheetTwo weeks of punches or hours, overtime counted per week. Printable timesheetFree blank weekly or biweekly sheet to print or save as PDF. 12-hour shift2-2-3 calendar, weekly hours, and overtime.

Pay math

Overtime plannerHours already done plus remaining punches. OvertimeWeekly 40, California, daily 8, Colorado, or two rates. Hourly to salaryConvert hourly pay to yearly and back. Time clock rounding5, 6, or 15 minute rounding, including the 7-minute rule. Work days leftWeekdays remaining this month and year. Pay period calendarsBiweekly paydays by year, and 3-paycheck months.

Scheduling and attendance

24/7 staffingHow many employees a 24/7 or extended-hours schedule needs. Rolling absenceAbsences in a rolling 12 months, Bradford Factor and roll-off dates. Shift schedulesPitman, DuPont, 4 on 4 off and custom rotation calendars.

How the math works: how to calculate work hours and time clock rounding.

Work hours questions

How do I calculate hours worked in a day?

Subtract the clock-in time from the clock-out time, then subtract unpaid breaks. 8:30 a.m. to 5:15 p.m. with a 30-minute lunch is 8 hours 15 minutes, or 8.25 decimal hours. The hours between times calculator handles overnight shifts.

What is the difference between a time card and a timesheet?

A time card records clock-in and clock-out punches; a timesheet is the record of hours worked each day, which payroll signs off. On this site the time card calculator splits punches into regular and overtime hours with pay, and the weekly timesheet keeps in and out times saved in your browser for one week.

Which calculator should I use for a biweekly pay period?

Use the biweekly timesheet calculator. It holds 14 days and works out overtime for each week on its own, because federal overtime cannot be averaged across two weeks.

When does overtime start?

Under federal law, after 40 hours in a workweek, at 1.5 times the regular rate (US Department of Labor). California and a few other states also count daily overtime.

What is the 7-minute rounding rule?

Employers who round to the quarter hour may round 1 to 7 minutes down and 8 to 14 minutes up, as long as it evens out over time. See the time clock rounding guide.

Cite this page

APA: ClockTotals. (2026, October 16). Work Hours Calculators. https://clocktotals.com/work-hours/

MLA: “Work Hours Calculators.” ClockTotals, 16 Oct. 2026, clocktotals.com/work-hours/.

Link (HTML): <a href="https://clocktotals.com/work-hours/">Work Hours Calculators</a>