CodeKitHubWhat Is This Tool?
A work hours calculator turns clock-in and clock-out times into a duration — the number of hours and minutes actually worked. It subtracts any unpaid break you enter, such as a lunch, and correctly handles shifts that cross midnight (clocking in at 22:00 and out at 06:00 the next day).
It also adds up multiple shifts in a single day (for split shifts) and multiple days in a week, so you can build a weekly timesheet without a spreadsheet. If you enter your hourly wage, it multiplies the total time by the rate to show what you're owed.
Why Use It?
- Handles multiple shifts per day and overnight shifts that cross midnight.
- Deducts an unpaid lunch or break in minutes, so the total reflects actual hours worked.
- Add multiple days to total a full week's hours and pay at once.
- Optional hourly-wage field converts total time into total pay instantly.
- Runs entirely in your browser — nothing you enter is sent anywhere.
How to Use
- Enter the clock-in and clock-out time for a shift.
- Enter any unpaid break in minutes (for example 30 for a lunch break) — it's subtracted from the shift.
- Add another shift row if you worked a split shift that day, or add a day row to build a weekly total.
- Enter your hourly wage in the optional field to see total pay alongside total hours.
Example
Input
Clock in 09:00, clock out 17:30, 30-minute lunch breakOutput
Hours worked: 8h 0m17:30 − 09:00 = 8h 30m of clocked time. Subtracting the 30-minute lunch break leaves 8h 0m actually worked.
Common shift lengths and lunch deductions
| Clock in | Clock out | Break | Hours worked |
|---|---|---|---|
| 09:00 | 17:00 | 30 min | 7h 30m |
| 08:00 | 16:30 | 30 min | 8h 0m |
| 09:00 | 18:00 | 60 min | 8h 0m |
| 22:00 | 06:00 (+1 day) | 0 min | 8h 0m |
| 07:00 | 19:00 | 45 min | 11h 15m |
Related tools
Once you have a total, the percentage calculator is useful for figuring out an overtime premium or a raise, and the unit converter handles other everyday conversions. For scheduling and counting days between dates, the date calculator is a natural companion.
Frequently Asked Questions
How do I calculate actual hours worked after deducting a lunch break?
First find the raw clocked time by subtracting clock-in from clock-out. Then subtract the unpaid break in minutes. For example, clocking in at 08:30 and out at 17:00 gives 8h 30m raw; subtracting a 30-minute lunch leaves exactly 8h 0m actually worked. Only unpaid breaks should be subtracted — short paid breaks usually stay counted as worked time.
How do I calculate overtime duration?
Subtract your regular scheduled hours (commonly 8 hours a day or 40 hours a week) from the total hours worked; anything above that is overtime. If you worked 9h 45m in a day with an 8-hour standard shift, overtime is 1h 45m. For a week, add up all worked hours first, then subtract 40 to find the weekly overtime — many employers calculate it weekly rather than daily.
How does the calculator handle a shift that crosses midnight?
Enter the clock-out time as normal even if it's earlier numerically than the clock-in time — for example clock in at 22:00 and clock out at 06:00. The calculator detects that the end time is on the next day and adds 24 hours before subtracting, correctly returning 8 hours instead of a negative number.
Can I calculate a full week's hours and pay at once?
Yes. Add a row for each day worked, with its own clock-in, clock-out and break, then enter your hourly wage once. The tool sums every day's hours into a weekly total and multiplies it by your wage to show total pay for the week.
Is my data stored anywhere?
No. The calculation runs entirely in your browser with JavaScript; nothing you enter — times, wages or breaks — is sent to a server, stored or logged.