Time Card Calculator
Add up a whole week of shifts — clock in, clock out, and breaks for each day — into one weekly total.
Fill in when you clocked in and out each day, subtract each day's break, and this time card calculator totals every day and rolls them into a weekly figure — in both hours-and-minutes and the decimal hours payroll expects. Leave a day blank and it counts as zero, so it works for five-day weeks, six-day weeks, or irregular schedules.
How this calculation works
- 01For each day, convert the clock-in and clock-out times into minutes from midnight.
- 02If a day's clock-out is earlier than its clock-in, add 24 hours — that day's shift crossed midnight.
- 03Subtract clock-in from clock-out, then take off that day's unpaid break, to get the daily total.
- 04Add every day's total together to get the weekly minutes.
- 05Format the week as HH:MM, and divide the minutes by 60 for decimal hours.
- —Any day left without a clock-in or clock-out is treated as a day off (zero hours).
- —Breaks are per-day and unpaid — set a day's break to 0 if it was paid.
- —Overnight shifts are handled per day, so a 21:00 → 05:00 night shift counts as 8 hours on that row.
- —The weekly total is the plain sum of daily hours — it does not apply overtime multipliers.
Worked examples
Mon-Fri, 09:00-17:00 each day with a 60-minute lunch
35h 00m for the week (35.00 decimal hours)
Three 12-hour shifts, 07:00-19:00, with 30-minute breaks
34h 30m for the week (34.50 decimal hours)
Four nights, 22:00-06:00, no breaks
32h 00m for the week (32.00 decimal hours)
Frequently asked questions
- How do I calculate weekly hours from a time card?
- Work out each day's hours by subtracting clock-in from clock-out and taking off the break, then add the seven daily totals together. This calculator does both steps for you and shows the weekly figure in hours-and-minutes and decimal hours.
- Can I leave some days blank?
- Yes. Any day without a clock-in and clock-out is counted as a day off, so you can use it for a standard five-day week or any irregular schedule without zeroing rows manually.
- Does it subtract breaks from each day?
- Each day has its own break field in minutes, which is treated as unpaid and subtracted from that day's total before everything is summed. Set a day's break to 0 if the break was paid.
- How is this different from tracking time in InstaClock?
- A time card is a manual snapshot you re-enter each week. InstaClock records the hours as you go, keeps the weekly and monthly totals automatically, and shows where the time actually went — so you never have to reconstruct a timesheet from memory.
Stop calculating. Start tracking.
InstaClock keeps your hours, weekly totals, and visual reports running automatically — no start-and-end-time arithmetic required.
Free to start · No card required