Time Card Calculator

How Time Card Calculator Works

Daily Hours = (End - Start - Break) / 60 min | Weekly Hours = sum(Daily Hours)

S & E

Start & End Time — S is when work began and E is when it ended, both in 12-hour (9:00 AM) or 24-hour (09:00) format. For overnight shifts, the end time can be earlier than the start time.

B

Break Duration — The total unpaid break time taken during the day, in hours:minutes format (e.g., 0:30 for 30 minutes, 1:00 for 1 hour).

OT

Overtime Threshold — The number of hours per week after which overtime pay applies. Standard is 40 hours per week. Set to 0 for straight time (no overtime, all hours at regular rate).

How to Use

1. Select the Monday date of the work week (optional, used for the weekly display header).
2. Toggle the hourly rate switch to enable gross pay calculation with overtime.
3. Enter time entries one per line in the text area.
4. Format each line as: Day, Start, End, Break (e.g., Mon, 9:00, 17:00, 0:30).
5. Set the overtime threshold (defaults to 40 hours per week). The standard work week in many countries.
6. Review the daily breakdown, weekly total, regular hours, overtime hours, and total gross pay.

Quick Reference

Understanding the Result

Worked Examples

Frequently Asked Questions

How does the calculator handle shifts that cross midnight?

If the end time is earlier than the start time (e.g., start at 22:00, end at 06:00), the calculator automatically assumes the shift crosses midnight and adds 24 hours to the end time before computing the duration. This correctly handles overnight shifts for security guards, healthcare workers, manufacturing plant staff, and hospitality workers who work through the night.

Can I use 12-hour time with AM/PM?

Yes. The calculator accepts both 12-hour format (e.g., 9:00 AM, 1:30 PM, 11:59 PM) and 24-hour format (e.g., 09:00, 13:30, 23:59). Just be consistent within each entry — mixing formats in a single line may cause parsing errors. The calculator also accepts entries without AM/PM in 12-hour mode by assuming reasonable defaults.

How is overtime calculated?

Overtime is calculated as total weekly hours minus the overtime threshold. For example, if you work 45 hours with a 40-hour threshold, the first 40 hours are regular time and the remaining 5 hours are overtime. Overtime is typically paid at 1.5x (time and a half) or 2x (double time) your regular hourly rate, though this is configurable. Some jurisdictions also have daily overtime rules (e.g., hours beyond 8 in a single day), which this calculator tracks alongside weekly overtime.

What happens if I forget to enter a break time?

Break duration is optional. If you leave it blank, the calculator assumes zero break time. You should enter your unpaid break duration in hours:minutes format (e.g., 0:30 for a 30-minute lunch break, 1:00 for a 1-hour break). The break time is subtracted from the total time between start and end to compute hours worked.

Can I save or export my time card data?

The calculator displays daily and weekly totals on screen. You can export the results for your records by using your browser's print function (to save as PDF) or by copying the displayed values into your own spreadsheet or payroll software.

Pro Tips

• →Enter all 7 days even if some are 0 hours — the calculator's daily breakdown makes it easy to spot missing entries. Use format like "Sat, 0:00, 0:00, 0:00" or simply skip that day since empty lines are filtered.
• →For break durations, the input format is hours:minutes (not minutes alone). Enter "0:30" for 30 minutes, "1:00" for a 1-hour lunch. The calculator also accepts just minutes if you prefer — for quick input, you can type "30" and it will be treated as 30 minutes.
• →The overtime threshold selector includes "None (straight time)" which treats all hours as regular regardless of total. Use this when your employer pays straight time for all hours, or when you want to see the raw total hours without overtime splitting.
• →Toggle between 1.5x and 2x overtime rates to compare pay scenarios. If you are unsure which rate applies to your situation, calculate both and discuss with your employer. Double time (2x) is common for holidays and hours beyond 12 in a single day in some jurisdictions.
• →Copy-paste the daily breakdown JSON into a spreadsheet for record-keeping. The numeric hours values can be summed, averaged, or charted over multiple weeks to track work patterns.

Limitations to Know

• •This calculator does not enforce daily overtime rules (e.g., California requires overtime after 8 hours in a single day). It only computes weekly overtime based on the total-hours-over-threshold method.
• •Public holidays are not accounted for — holiday premium pay rates (often 2x or 2.5x) must be calculated separately. The calculator treats all days as standard workdays.
• •Break deductions assume unpaid breaks; paid breaks should be entered as 0:00. If your breaks are compensated, do not deduct them.
• •The calculator provides estimates only and should not replace official payroll processing systems. Labor laws vary by jurisdiction — consult your local labor board or HR department for the rules that apply to your specific situation.
• •For multi-rate scenarios (different rates for different days or tasks), run the calculator separately for each rate and combine the results manually.

Sources

• Timesheet