Work Hours Calculator

Enter the start and end times and your breaks to get the hours worked. Add the scheduled hours to see the difference.

Start time

End time

Breaks (minutes; if you have several, they are added up)

min

Scheduled hours (optional; if you enter them, the difference from the hours worked is shown)

hours

min

Decimal places for decimal hours

Hours worked (time from start to end − breaks) —

Time from start to end—

Total break—

Hours worked (decimal)—

This only calculates the difference in time. It does not check legal break requirements, overtime pay or night-shift hours.

The value copied is the number of hours worked in decimal form.

How it is calculated

Time from start to end = end time − start time. If the end time is earlier than the start time, the end is counted as a time on the next day (a shift that passes midnight).
Hours worked = time from start to end − total break.
Difference from the scheduled hours = hours worked − scheduled hours. A positive value means longer than scheduled, a negative value shorter.

The time fields are read as a 24-hour clock. Your browser may display them with AM/PM, but they are read the same way.

Examples

9:00 to 18:30 with a 60-minute break: 9 h 30 min from start to end, 8 h 30 min worked (8.5 hours). If 8 hours were scheduled, that is 30 minutes longer.
22:00 to 7:00 the next morning with a 60-minute break: 9 hours from start to end, 8 hours worked (a shift that passes midnight).

Converting to decimal hours

Timesheets and payroll often write "8 hours 30 minutes" as 8.5 hours. Divide the minutes by 60 (30 minutes = 0.5 hours, 20 minutes = 0.3333… hours). When the result does not divide evenly, it is rounded to the number of decimal places you choose.

Things to know

This is a tool for time differences only. It does not check whether breaks meet a legal minimum, whether overtime or night-shift premiums apply, or how much you should be paid. Labor rules differ by country and employer. Check your contract or ask a professional.
If the start and end times are the same, an error is shown (a 24-hour shift is not assumed).
If the total break is as long as or longer than the time from start to end, an error is shown.
To add up several durations or find the difference between two clock times, use the Time Calculator.

Frequently asked questions

Can it calculate a shift that passes midnight?

Yes. If the end time is earlier than the start time, it is counted as a time on the next day, and a note is shown in the result.

What if I took more than one break?

Enter the minutes in Break 1, Break 2 and Break 3. The total is subtracted.

What happens when I enter the scheduled hours?

The difference between the hours worked and the scheduled hours is shown. Overtime pay is not calculated.