Whether you are paid by the hour, tracking your own overtime, or filling out a weekly timesheet, the number that matters most is simple: how many hours did you actually work, and what are they worth? This hours calculator takes your clock-in time, your clock-out time, and any unpaid break, then turns them into hours per day, total weekly hours, and — when you add an hourly rate — your gross weekly pay. It is built for real time cards, not for converting an annual salary.
Because minutes are sixtieths of an hour, the calculator converts every clock time into decimal hours before subtracting anything. That is the same conversion a payroll department uses: 8:42 becomes 8.70 hours, and a 45-minute lunch becomes 0.75 of an hour. Enter your times once and the weekly total updates instantly, so you can experiment with starting earlier, skipping a break day, or bumping your rate.
How to Use
- Set Days Worked per Week — how many days you clock in. Most full-time staff enter 5, but part-time, freelance, and shift workers often enter 3 or 4.
- Enter your Clock-In Hour and Clock-In Minute on a 24-hour clock. If you start at 9:15 AM, type hour 9 and minute 15.
- Enter your Clock-Out Hour and Clock-Out Minute the same way. A 5:30 PM finish is hour 17 and minute 30.
- Add your Unpaid Break in minutes. If your lunch is not paid, deduct it here; if you are paid through your break, set it to 0.
- (Optional) Type your Hourly Pay Rate to see gross pay. Leave it at 0 to calculate hours only, or to compare schedules before negotiating a rate.
The result card shows your net hours per day, the total weekly hours after breaks, and your gross weekly pay (before taxes and deductions). If your clock-out time is earlier than your clock-in time, the calculator flags the input instead of returning a negative number, because a time card with start after finish is almost always a typo rather than a real shift.
The Time-Card Formula
Every worked-hour calculation comes down to converting hh:mm into decimal hours:
dailyHours = (endHour + endMinute ÷ 60) − (startHour + startMinute ÷ 60) − (unpaidBreak ÷ 60)
weeklyHours = dailyHours × daysPerWeek
grossWeeklyPay = weeklyHours × hourlyRate
Where:
- The start and end times are read on a 24-hour clock and converted to decimal by dividing minutes by 60.
- The unpaid break is the minutes of lunch or rest that your employer does not pay you for.
- The hourly rate is your gross wage per hour, before tax, Social Security, health premiums, and 401(k) contributions are taken out.
Worked example: a 9:00 AM to 5:00 PM shift with a 30-minute unpaid lunch. Start is 9.0, end is 17.0, break is 0.5. Daily hours = 17.0 − 9.0 − 0.5 = 7.5 hours. Across a five-day week that is 37.5 hours, and at a $20 hourly rate the gross pay is 37.5 × $20 = $750 per week. Notice that the unpaid lunch drops what would have been a clean 40-hour week to 37.5 — which is exactly why tracking the break matters.
Why Minutes Matter
A common mistake is to treat 8:30 as 8.30 hours instead of 8.50. In decimal hours, 30 minutes is 0.5, not 0.3. Over a week that error compounds: entering 8:30 as 8.30 undercounts each day by 0.20 hours, and five days loses a full hour — which on a $25 rate is a $25-per-week, or roughly $1,300-per-year, mistake on your own pay. Converting minutes with ÷60 removes that trap automatically.
This is also why overtime thresholds are checked against weekly decimal hours, not clock-face hours. Once you pass 40 net hours in a week (after unpaid breaks), many jurisdictions require overtime pay at 1.5× the rate. Run your schedule through this calculator first: a 7.5-hour day plus a short Friday can push you over 40 and unlock a rate you may not have realized you earned.
Examples
Example 1 — Standard office day. Someone clocks in at 9:00 AM (9:00), out at 5:00 PM (17:00), takes a 30-minute unpaid lunch, and works 5 days. Net daily hours are 7.5, weekly hours are 37.5, and at a $20 rate the gross weekly pay is $750.
Example 2 — Split shift with a long break. A barista starts at 8:30 AM (8.5), returns from a one-hour unpaid break, and finishes at 5:15 PM (17.25). Daily hours = 17.25 − 8.5 − 1.0 = 7.75 hours. Over four days that is 31.0 weekly hours, and at a $19 rate the gross pay is $589.00 per week.
Example 3 — Pushing into overtime. A nurse works a 7:00 AM (7.0) to 4:30 PM (16.5) shift with a 30-minute unpaid break, five days a week. Net daily hours are 9.0, so weekly hours are 45.0 — already past the 40-hour threshold. At a $30 straight rate the first 40 hours are $1,200, and the 5 overtime hours at 1.5× ($45) add $225, for a gross weekly figure near $1,425. Use this calculator to spot that overtime boundary before you submit your timesheet.
Example 4 — No break, hours only. A contractor wants to know weekly hours without pay. Clock-in 8:00, clock-out 16:30, unpaid break 0, six days a week. Daily hours = 8.5, weekly hours = 51.0. Leaving the rate at 0 keeps the result card to hours alone.
FAQ
How do I calculate hours worked between two times?
Convert both times to decimal hours by dividing minutes by 60, then subtract the start time from the end time. For a 9:00 AM to 5:00 PM shift that is 17.0 − 9.0 = 8.0 hours. Then subtract any unpaid break — a 30-minute lunch becomes 0.5 hours — to get your net worked hours.
Do I subtract my lunch break from my hours?
Only if the break is unpaid. If your employer pays you for lunch, leave the break field at 0. If lunch is unpaid, enter it in minutes so the calculator deducts it from the day. In the US, federal law does not require meal breaks in the first place, but when they are unpaid they must be a bona fide duty-free period.
How many hours is a 9-to-5 work day?
A 9:00 AM to 5:00 PM shift is 8 clock hours, but after a typical 30-minute unpaid lunch your net worked time is 7.5 hours. Across five days that is 37.5 net hours, which is why many "full-time" schedules still land slightly below 40 paid hours.
How do I convert minutes to decimal hours?
Divide the minutes by 60. So 15 minutes = 0.25, 30 minutes = 0.5, 45 minutes = 0.75, and 42 minutes = 0.70. This calculator does the conversion automatically, but knowing it helps you double-check a payroll statement.
What is my gross weekly pay from hours worked?
Multiply your total weekly hours by your hourly rate. For 37.5 hours at $20 per hour, gross pay is 37.5 × $20 = $750. This is gross pay before taxes, Social Security, health insurance, and retirement contributions; your actual take-home pay will be lower.
When do overtime hours start?
In the United States, non-exempt employees generally earn overtime at 1.5× the regular rate for any hours worked over 40 in a single workweek. Run your net weekly hours (after unpaid breaks) through this calculator; once it crosses 40, the extra hours are usually eligible for the higher rate under the Fair Labor Standards Act, though some states set lower thresholds.
Does this calculator convert my hourly pay to a yearly salary?
No. This tool sums time-card hours into daily and weekly totals and multiplies by an hourly rate for gross weekly pay. If you need to turn an annual salary into a monthly or biweekly figure, use a dedicated salary converter instead — this page is specifically for clock-in and clock-out hours.
Disclaimer
This hours calculator is provided for informational purposes only and does not constitute legal, payroll, tax, or employment advice. Gross pay figures are estimates based solely on the clock times, break length, and hourly rate you enter, and they do not account for taxes, overtime rules, deductions, shift differentials, or local labor laws. Overtime and break requirements vary by jurisdiction and employment status. Always confirm your actual hours and pay with your employer or a qualified payroll professional.