Work Hours Calculator UK
Add up your weekly working hours from each day’s start, end and break times — a simple timesheet.
How it works
Fill in the start time, end time and break for each day of the week. The calculator totals the hours per day and for the whole week, shows your daily average, and flags any hours beyond 40.
Frequently asked questions
How do I calculate hours worked?
Find the time between clock-in and clock-out, then subtract any unpaid breaks. 9:00 to 17:30 minus a 30-minute lunch is 8 hours.
Are breaks subtracted from work hours?
Unpaid breaks are deducted; paid breaks remain part of the total. Enter only unpaid break time to remove it.
How do I total a week of hours?
Add each day’s worked hours. Five 8-hour days total 40 hours for the week.
How do I convert to decimal for payroll?
Divide the minutes by 60 and add to the hours — 8 hours 15 minutes is 8.25 — then multiply by the hourly rate.
Does it handle overnight shifts?
Yes. If clock-out is earlier than clock-in, it treats the end as the next day and counts across midnight.
How does overtime work in the UK?
In the UK there is no statutory overtime premium; extra hours are paid according to your contract, subject to National Minimum Wage and the 48-hour average working-week limit.
Calculating worked hours
A work hours calculator turns your clock-in and clock-out times into total hours worked, subtracting any unpaid breaks. It is the quick way to fill in a timesheet accurately, including shifts that run across midnight.
Worked example
Clocking in at 9:00 AM and out at 5:30 PM is 8 hours 30 minutes. Subtract a 30-minute unpaid lunch and you have 8 worked hours. Over a five-day week of the same schedule, that totals 40 hours.
Breaks and decimal hours
Only unpaid breaks are deducted; paid breaks stay in the total. For payroll, the result is often converted to decimal hours — 8 hours becomes 8.0, and 8 hours 15 minutes becomes 8.25 — so it can be multiplied directly by an hourly rate.
Tracking work hours helps with accurate pay, overtime (in the UK, paid per your contract rather than a statutory premium), and spotting how time is actually spent across a week or pay period.
Results are estimates for general guidance in United Kingdom and may not reflect the latest local rates, fees or rules. Check official sources before making decisions.