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i-TimeManagement
Time cardTime calculatorHours calculatorTime card calculatorSee all: Time and hoursDate calculatorDays between datesBusiness days calculatorSee all: DatesCountdown timerStopwatchPomodoro timerSee all: Timers and focus2-2-3 work scheduleDuPont schedule4/10 work scheduleSee all: Shift schedulesOvertime rulesFederal holidaysHours in a yearSee all: Guides

16 tools · 8 shift schedules · Nothing to sign up for

Time math, done right.

Add up hours, fill in a time card with overtime, convert military time, count business days and time your work. Every tool runs in your browser.

Time calculatorTime card
  • No sign-up
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Tools

Grouped by what you are trying to do.

Time and hours

Time calculatorAdd and subtract hours, minutes and secondsHours calculatorHours between two times, with breaks and overnight shiftsTime card calculatorWeekly hours, lunch breaks and overtimePrintable timesheetA weekly or biweekly time sheet with your dates, ready to printTime to decimal calculatorHours and minutes to decimal hours, and backMilitary time converter24-hour time to 12-hour time and back, with a chartSeconds to minutesConvert seconds, minutes, hours, days and weeks

Dates

Date calculatorAdd or subtract days, weeks, months, years or business daysDays between datesDays, weeks, weekdays and business days between two datesBusiness days calculatorWorking days between dates, minus weekends and federal holidaysPay period calendarEvery payday of the year, biweekly, weekly or twice a monthWhat week is it?ISO week number for any dateDay of the yearDay number, days left and the Julian (ordinal) dateUnix timestamp converterEpoch seconds to a date, and back

Timers and focus

Countdown timerA simple timer with an alarmStopwatchOnline stopwatch with lapsPomodoro timerFocus sessions with short and long breaksEisenhower matrixSort tasks by urgent and important

Shift schedules

See your days on and off and your hours each week.

All schedules
Rotating 12-hour2-2-3 work schedule Also called the Panama or 2-3-2 schedule: 12-hour shifts on a 14-day cycle with every other weekend off. Rotating 12-hourDuPont schedule A 4-week rotation of 12-hour day and night shifts with a full 7 days off at the end of each cycle. Compressed workweek4/10 work schedule Four 10-hour days a week and three days off: 40 hours in four days. Compressed workweek9/80 work schedule 80 hours in 9 days: eight 9-hour days, one 8-hour day and every other Friday off. Rotating 12-hour4 on 4 off schedule Four 12-hour shifts, then four days off, on an 8-day cycle that drifts through the week. Fire service 24-hour48/96 schedule A fire service schedule: two 24-hour shifts in a row, then four days off. Fire service 24-hour24/48 schedule One 24-hour shift, then two days off, on a 3-day cycle. Fire service 24-hourKelly schedule A fire service rotation of three 24-hour shifts on alternating days, then four days off.

Guides

All guides
How Many Hours Are in a Year? (And Work Hours in 2026 and 2027)There are 8,760 hours in a year and 8,784 in a leap year. A full-time year is 2,000 work hours in 2026 and 1,…How Many Hours Is 9 to 5? (And Other Common Shifts)9 to 5 is 8 hours, or 7.5 hours of work with a 30-minute unpaid lunch. Hours for 8 to 5, 7 to 3:30, 7 to 7 an…Overtime RulesFederal overtime is 1.5 times the regular rate after 40 hours in a workweek. Alaska, California, Colorado and…Time BlockingTime blocking means giving each task its own slot on the calendar. How to set it up, a sample day, and how to…US Federal Holidays 2026 and 2027 (Observed Dates)US federal holidays for 2026 and 2027 with the dates federal offices observe them, including when a holiday f…