Free calculator
Working hours calculator: the online tool with lunch break
Enter the start, end and break for each day: this hours worked calculator (a time card calculator) instantly gives you the hours worked and the weekly total, in hours and minutes and in decimals. Free, no sign-up.
Calculate hours worked
How to calculate hours worked
The rule is simple: hours worked = end time minus start time, minus the break. For example, from 9:00 am to 6:00 pm with a one-hour break is 9 hours on site minus 1 for the break, so 8 hours worked. To get the monthly total, just add up the hours of all the days worked.
How it works
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Enter your times
For each day, enter the start and end time. Empty days are not counted.
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Add the break
Enter the break in minutes, for example 60 for a one-hour lunch break.
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Read the total
See the hours for each day and the weekly total, in hours and minutes and in decimals.
Start, end, break: the calculator does the rest.
What you can do
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Lunch break included
The break minutes are deducted automatically from each day’s hours.
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Night shifts
If the end time is earlier than the start time, the shift is counted as ending the next day.
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Hours and decimals
The total appears in hours and minutes and in decimal format, handy for payroll and invoices.
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Data stays on your device
The calculation runs in your browser: the times you enter are neither sent nor stored.
When the calculator is no longer enough
The calculator is fine for checking a single week. When you need to track hours for your whole team, month after month, Klokka records them as people work, links them to clients and projects, and prepares the timesheet for you.
Frequently asked questions
How do you calculate hours worked with a lunch break?
Subtract the start time from the end time, then subtract the break. From 8:30 am to 5:30 pm with a 60-minute break is 9 hours minus 1, so 8 hours worked.
How do I convert minutes to decimals?
Divide the minutes by 60: 30 minutes is 0.5 hours, 45 minutes is 0.75. So 7 hours and 30 minutes is written as 7.5 hours.
How do I calculate hours worked in a month?
Add up the hours of all the days worked in the month. With a fixed schedule, multiply the daily hours by the days worked: 8 hours times 21 days is 168 hours.
How do I calculate hours worked in Excel?
With the start in A2, the end in B2 and the break minutes in C2, use the formula =(B2-A2)*24-C2/60 and format the cell as a number. The result is in decimal hours.
The other Klokka features
Try Klokka in your company
Request a demo: we’ll show you how Klokka simplifies time tracking and hour accounting.
Alex