U.S. timesheets often use AM/PM entries. Everhour supports cleaner team time workflows after those entries become reliable totals.
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This calculation answers a simple timesheet question: which 24-hour time matches a 12-hour AM/PM entry? A start time of 9:15 AM becomes 09:15. An end time of 5:45 PM becomes 17:45. The format changes, but the actual moment in the day stays the same. Consistent formatting helps you subtract start time from end time without guessing whether 5:45 means morning or afternoon.
The standard U.S. English short date and time pattern uses month/day/year with a 12-hour AM/PM time format, so U.S. timesheet inputs commonly need AM/PM parsing. The two special cases are noon and midnight. 12:00 PM is 12:00, and 12:00 AM is 00:00. Every other PM hour adds 12 to the hour number.
For AM times from 1:00 AM through 11:59 AM, keep the hour number and add a leading zero when needed. For PM times from 1:00 PM through 11:59 PM, add 12 to the hour. The minute value never changes. A 7:35 AM entry becomes 07:35, while a 7:35 PM entry becomes 19:35.
For a worked timesheet example, convert 9:15 AM to 09:15 and 5:45 PM to 17:45. In decimal hours, 09:15 is 9.25 and 17:45 is 17.75. The gross span is 8.50 hours. Subtract a 45-minute unpaid meal period, or 0.75 hours, and the paid total is 7.75 hours. At $21 per hour, straight-time gross pay is $162.75.
The most common AM/PM conversion mistake is treating 12 as a normal hour. Noon does not become 24:00 for a same-day timesheet entry. Midnight does not stay 12:00 in 24-hour time. A shift from 11:30 PM to 2:30 AM crosses midnight, so the end time belongs to the next calendar day even though 02:30 is smaller than 23:30.
A second mistake is converting the display format and skipping policy review. Federal law does not require lunch or coffee breaks for adult employees. When an employer provides short breaks, usually about 5 to 20 minutes, federal law treats them as paid hours worked that count toward weekly overtime. A bona fide meal period is generally unpaid only when the employee is completely relieved from duty.
A one-off conversion is enough when you only need to change a few AM/PM entries into 24-hour time or check a single shift total. It also works for a quick correction before a spreadsheet import. Keep the date beside each punch if the shift crosses midnight, because the time alone does not show which day the punch belongs to.
A managed workflow matters once multiple people submit time, managers approve entries, or payroll needs a dependable record. Covered, nonexempt employees in the United States must receive overtime pay for hours worked over 40 in a fixed workweek, and hours cannot be averaged across multiple workweeks for overtime. Everhour Team Management supports approvals, lock rules, admin corrections, personal tracking limits, weekly capacity, roles, project assignments, team groups, and team-wide time policy defaults.
This content is for general information only, may not be fully up to date, and is provided without any warranty or liability.
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Add 12 to the hour for PM times from 1:00 PM through 11:59 PM, and keep the minutes unchanged. 1:20 PM becomes 13:20, 6:05 PM becomes 18:05, and 11:45 PM becomes 23:45. Leave 12:00 PM through 12:59 PM as 12:00 through 12:59 because those times are already in the noon hour.
Keep the same hour for 1:00 AM through 11:59 AM, then add a leading zero for single-digit hours. 8:10 AM becomes 08:10, and 11:50 AM stays 11:50. Convert 12:00 AM through 12:59 AM to 00:00 through 00:59 because those times fall in the first hour of the day.
12 PM is noon, so it already sits at hour 12 in a 24-hour day. Adding 12 would create 24:00, which marks the end of a day in some contexts and does not represent a normal same-day clock punch. For timesheet entries, 12:30 PM converts to 12:30, and 12:30 AM converts to 00:30.
Record the calendar date with each punch, then calculate the span across the date change. A 10:00 PM start converts to 22:00, and a 3:00 AM end converts to 03:00 on the next day. The paid span is 5 hours before any unpaid break deduction, because the end punch belongs to the following calendar date.
AM/PM conversion does not change overtime rules. It only prevents time-entry mistakes before hours are totaled. Under the federal baseline, covered, nonexempt employees in the United States must receive overtime pay for hours worked over 40 in a fixed workweek at not less than one and one-half times the regular rate of pay.
Everhour Team Management lets admins lock time after a period or after approval, set daily, weekly, or monthly tracking limits, and correct time entries for team members. That workflow keeps AM/PM fixes, late edits, and approval changes controlled before payroll or billing review.
Everhour Timesheets collect weekly project hours and working hours by person, then let managers approve, reject, or partially approve submitted time. Submitted time is locked unless withdrawn or rejected, and approved time stays locked for regular members.
Use conversion for one-off checks, then move recurring time review into Everhour Team Management with approvals, lock rules, limits, corrections, and cleaner payroll handoff.
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