A time card calculator for hours worked. Give ShiftSum Time Card your clock-in and clock-out times and it adds them up exactly: multiple in and out punches per day, split shifts, overnight shifts that cross midnight, and unpaid lunch breaks, in 12-hour (am/pm) or 24-hour military time. Times written without am/pm, like 9 to 5, are read sensibly and the reading is shown at the top of the result so you can confirm it.
Every day is shown in hours and minutes and in decimal hours, so you can copy the right number into payroll. Hours are split into regular, overtime, and double time per workweek: the US federal rule (over 40 hours a week at 1.5x), California daily rules (over 8 hours a day, double time over 12, and the 7th consecutive day), or your own thresholds. A biweekly time card is split into its two workweeks, so overtime is never averaged away. Add an hourly rate to get gross pay to the cent.
Optional punch rounding covers the nearest 5, 6, or 15 minutes and the 7-minute rule. It flags overlapping punches, missing clock-outs, and shifts longer than 16 hours.
The time card appears as an editable table in the chat: fix a time or a break and the totals recalculate. Download a CSV for spreadsheets or a clean printable PDF timesheet with employee and supervisor signature lines.
Good for hourly employees checking a paycheck, small business owners and managers totaling staff time cards, freelancers logging billable hours, and anyone asking how to calculate hours worked in decimals.
Limitations: overtime rules vary by jurisdiction and contract, so results are informational and not payroll, tax, or legal advice. It calculates gross pay only (no taxes or deductions), does not track time live or store time cards, and handles up to 62 days per calculation.