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Built for 24-hour time entry

Time Card Calculator (Military Time)

This time card calculator is built around 24-hour military time, the format most common on official timesheets, military schedules and time-clock printouts (08:00, 16:30, 23:15). It also accepts standard 12-hour time with am/pm in the same fields if that is easier for a particular entry, so you never have to convert a time before typing it in. Fill in your time in, time out and lunch or break in minutes for each day, and the weekly total updates automatically.

Day Time in Time out Lunch/break (min) Hours
Monday -
Tuesday -
Wednesday -
Thursday -
Friday -
Saturday -
Sunday -
Weekly total 0.00 hrs

Enter times in 24-hour military time (08:00, 16:30, 23:15) or standard 12-hour time (8:00am, 4:30pm): both formats work in the same field. Lunch/break is in minutes.

Total this week: - (- decimal hours)

How the military time card calculator works

Each row works the same way as a standard time card: time out minus time in, minus your lunch or break in minutes, gives that day's hours. The difference on this page is that the fields are built and labeled around 24-hour entry from the start, so a time card that already reads 06:00 to 14:30 can be typed in exactly as written, without converting to 6:00am and 2:30pm first.

If a shift crosses midnight, such as an overnight shift from 22:00 to 06:00, enter the times exactly as they appear on the schedule. The calculator detects that the time out (06:00) is earlier in the day than the time in (22:00) and automatically treats the shift as crossing into the next day, so the total still comes out to 8 hours rather than a negative or nonsensical number.

Military time to standard time reference

If you need to translate a specific military time to standard 12-hour time (or the reverse) for a conversation or a printed schedule, the table below covers the hour marks that come up most often on a work schedule.

Military timeStandard time
00:0012:00am (midnight)
06:006:00am
08:008:00am
12:0012:00pm (noon)
13:001:00pm
16:304:30pm
18:006:00pm
22:0010:00pm
23:5911:59pm

The short version of the conversion rule: military hours 00 through 11 match standard am hours directly (with 00 as 12am), and military hours 13 through 23 are standard pm hours minus 12 (so 22:00 minus 12 is 10:00pm). You do not need to do this conversion by hand to use the calculator above, since it reads either format directly, but it is useful for reading a schedule or a time clock printout at a glance.

A worked example

A weekly military-time schedule with a rotating early shift and one overnight shift:

DayTime inTime outBreakHours
Monday06:0014:0030 min7.50
Tuesday06:0014:0030 min7.50
Wednesday22:0006:0030 min7.50
Thursday06:0014:0030 min7.50
Friday06:0014:0030 min7.50

That comes to 37.5 hours for the week: five 7.5-hour shifts, including the overnight Wednesday-into-Thursday shift entered exactly as 22:00 to 06:00. The weekly total shows both 37.50 decimal hours and 37h 30m.

When military time entry matters

Some workplaces, particularly government, military, healthcare, security and logistics employers, run their official timekeeping in 24-hour format specifically to avoid am/pm ambiguity on printed schedules and shift handoffs. If your time card, schedule or time-clock system already shows times this way, entering them directly here (rather than mentally converting each one to 12-hour format first) is both faster and less error-prone, since every conversion step is a chance to swap an am for a pm by mistake.

If your schedule is not in military time and you do not need this framing, the work hours calculator on the homepage covers the same weekly time-in/time-out table plus an hourly pay rate and overtime estimate, which this page intentionally leaves out to stay focused on time-card entry itself. And once you have a weekly total from this time card, the payroll hours calculator can apply payroll rounding and a pay rate to it.

Related tools

Work Hours CalculatorEnter clock-in/out times for the week, get total and decimal hours instantly.Add Up Work HoursAlready know your daily hours? Add them up for the week without clock times.Payroll Hours CalculatorConvert worked time to decimal hours and gross pay, with quarter-hour rounding.

Frequently asked questions

How do I calculate hours from a military time card?
Enter your time in and time out in 24-hour format (for example 08:00 and 16:30) for each day, plus any lunch or break in minutes. The calculator subtracts the break from the time between clock-in and clock-out and totals the week automatically.
What is 22:00 in standard time?
22:00 in military time is 10:00pm in standard 12-hour time. To convert any military hour from 13 to 23, subtract 12 (22 minus 12 is 10) and add pm; hours 00 to 11 are the same numbers with am (and 00:00 is 12:00am, midnight).
Can I mix military time and standard time in the same time card?
Yes. Every field accepts either 24-hour military time (16:30) or 12-hour time with am/pm (4:30pm): you can enter each day in whichever format matches how it is written on your original schedule.
How does an overnight shift work in military time?
Enter the time in and time out exactly as scheduled, even though the time out is technically the next calendar day: for example 22:00 as time in and 06:00 as time out. The calculator detects that the time out is earlier than the time in and automatically adds 24 hours to get the correct total.
Does this calculator work for a biweekly military timesheet?
This table covers one work week (7 days) at a time. For a biweekly time card, run the calculator once for each week and add the two weekly totals together, since most overtime rules are calculated on a weekly basis rather than across a full pay period.
What's the difference between this and the homepage work hours calculator?
Both use the same time-in/time-out/break table. This page is framed around 24-hour military time entry and leaves out the pay-rate and overtime-pay estimate to stay focused on the time card itself; the homepage calculator adds an hourly rate field and a weekly overtime pay breakdown.

Want pay and overtime included?

The homepage calculator adds an hourly rate and a weekly overtime estimate.

Go to the work hours calculator

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Work Hours Calculator (https://workhourscalculator.xyz)