Hours Calculator
Calculate the hours worked in a day using our hours calculator below. The calculator can even account for breaks and lunch.
Result:
Time Worked (hh:mm):  8:00

In Hours:  8 hrs

In Minutes:  480 min

On this page:
How to Calculate Hours Worked
If you need to submit a time card or track time for a job or project, then you probably need to track the hours you worked. Follow a few simple steps to find the total time you worked.
Step One: Convert Start and End to 24Hour Time
The first step in calculating hours is to convert the start and end times to 24hour time, sometimes called military time. To do this, morning hours will stay the same, and you will add 12 if the time is in the afternoon (1:00 pm to 11:59 pm).
For example, let’s calculate the elapsed time in hours for a start time at 9:00 am and an end time at 5:30 pm with a 30minute lunch break.
Start by adding 12 hours to the end time to convert it to 24hour time.
5:30 + 12 hours = 17:30
Step Two: Convert Minutes to Decimal Hours
The next step is to convert each time to decimal hours. You can use our time to decimal calculator for this, or just divide the minutes by 60.
For example, let’s convert the end time (17:30) to a decimal time by dividing the minutes by 60.
30 minutes ÷ 60 = 0.5
Since 30 minutes is equal to 0.5 hours, you can change the end time to 17.5 as a decimal. The start time has no minutes to divide, so it’s already in decimal form – 9:00 becomes 9.0.
Step Three: Subtract the Times
Now, simply subtract the decimal start time from the end time.
For example, subtract the start time (9.0) from the end time (17.5) to get the hours worked.
17.5 – 9.0 = 8.5 hrs
Step Four: Account for Breaks
The final step in calculating hours is to account for any unpaid breaks in the day. Add up all of the break time in minutes, then divide the total minutes by 60 to convert them to hours as a decimal.
Then, subtract the break time from the total time worked.
For example, let’s account for a 30minute break in the workday.
30 minutes ÷ 60 = 0.5
Finally, subtract the break time from the time worked.
8.5 – 0.5 = 8 hrs
So, that’s how you find that the total time worked in a day from 9:00 to 5:30 with a 30minute break is 8 hours.
Hours in a Typical Workday
The chart below shows the hours in a typical workday for various start and end times. This chart does not account for unpaid breaks during these times.
Start / End  Hours 

7:00 am – 2:00 pm  7 hrs 
7:00 am – 3:00 pm  8 hrs 
7:00 am – 4:00 pm  9 hrs 
7:00 am – 5:00 pm  10 hrs 
8:00 am – 3:00 pm  7 hrs 
8:00 am – 4:00 pm  8 hrs 
8:00 am – 5:00 pm  9 hrs 
8:00 am – 6:00 pm  10 hrs 
9:00 am – 4:00 pm  7 hrs 
9:00 am – 5:00 pm  8 hrs 
9:00 am – 6:00 pm  9 hrs 
9:00 am – 7:00 pm  10 hrs 
Don’t forget you can use our adding time calculator to add total hours up for a timesheet.
Frequently Asked Questions
How many hours is considered fulltime?
Under the Fair Labor Standards Act (FLSA), there is no legal definition for what is considered fulltime or parttime employment.^{[1]} Each employer makes the determination on what they consider to be parttime or fulltime employment. With that said, most employers consider 30 hours or greater per week to be fulltime.
How many work hours are in a typical work week?
For a fulltime job, there are 40 hours in a typical work week. However, each employer varies, and some employers offer fulltime jobs that are 32 hours per week, for example.
How many work hours are in a year?
If a fulltime employee works five days per week for the entire year, that totals 2,080 hours. Most employers consider 2,080 to be the standard number of work hours per year.
Overall, it’s important to understand how to calculate your total hours worked in order to track projects and ensure that you are paid accurately. It’s also important to understand what items need to be tracked on a time sheet, for example, paid or unpaid breaks.
References
 U.S. Department of Labor, FullTime Employment, https://www.dol.gov/general/topic/workhours/fulltime