Time Card Calculator - Hours Worked and Pay
Enter your clock-in and clock-out times for each day of the week plus any break time, and this calculator instantly totals your daily hours, flags overtime, and works out your gross pay. Adjust the hourly pay rate and overtime threshold to match your employer's rules. All math is shown step by step below the result.
How to use this time card calculator
Enter your clock-in and clock-out times for each day you worked. You can type times in a variety of formats: 9:00, 09:00, 9:00 AM, 900, or 13:00 all work. Fill in the break minutes for each day (the default is 30 minutes for weekdays), then set your hourly rate, the weekly overtime threshold, and the overtime multiplier in the Pay Settings section. The calculator totals your hours, splits them into regular and overtime, computes your gross pay, and shows a full day-by-day schedule table. Leave Saturday and Sunday blank if you did not work those days.
How total hours and pay are calculated
For each day, the calculator subtracts break minutes from the difference between clock-out and clock-in times. If you chose a rounding rule (5, 15, or 30 minutes), both clock-in and clock-out are rounded to the nearest interval before the difference is taken. The daily hours are summed to give total weekly hours. Any hours up to the overtime threshold are paid at the base hourly rate. Hours above the threshold are multiplied by the base rate and then by the overtime multiplier (1.5x for time-and-a-half, 2x for double time). Gross pay is the sum of regular pay and overtime pay.
Overtime thresholds and rounding explained
In the United States, the Fair Labor Standards Act sets the standard overtime threshold at 40 hours per week for non-exempt employees, with a minimum 1.5x rate for hours above that. Some states like California also apply a daily threshold of 8 hours. The UK has no statutory minimum overtime rate, so you would enter 1x and whatever threshold your contract specifies. Time rounding is a legal payroll practice in many countries: under the FLSA, employers may round to the nearest 5, 10, or 15 minutes as long as the policy does not consistently favor the employer. Choose "No rounding" to use exact times.
Converting between decimal and hours-minutes formats
Payroll software, invoices, and spreadsheets often use decimal hours rather than hours-and-minutes. To convert, divide the minutes by 60 and add to the whole hours: 7 hours 45 minutes = 7 + 45/60 = 7.75 decimal hours. This calculator shows both formats side by side so you can copy whichever one your payroll system needs. For example, a week of five 7.5-hour days (after breaks) totals 37.50 decimal hours, which would be displayed as 37h 30m in the hours-minutes field.
Common overtime rules by jurisdiction
| Rule | Threshold | Rate | Notes |
|---|---|---|---|
| US Federal (FLSA) | 40 hrs/week | 1.5x | Applies to non-exempt employees |
| California daily | 8 hrs/day | 1.5x | Also 2x after 12 hrs/day |
| California weekly | 40 hrs/week | 1.5x | Stacks with daily rule |
| UK (typical contract) | 37.5-40 hrs/week | Varies | No statutory OT rate; check contract |
| Canada (federal) | 8 hrs/day or 40 hrs/week | 1.5x | Provincial rules may differ |
| Australia (award-based) | 38 hrs/week | 1.5x to 2x | Rate depends on specific award |
Always verify the rules that apply to your specific employment contract and location.
Frequently asked questions
How do I enter times in this calculator?
You can type times in several formats: 9:00, 9:00 AM, 09:00, 900, or 1300 (24-hour). The calculator recognises both 12-hour (with or without AM/PM) and 24-hour formats. If you forget to add AM or PM, times below 12 are treated as AM and times 12 or above as PM.
What does "decimal hours" mean?
Decimal hours express time purely as a decimal number rather than hours and minutes. To convert, divide the minutes part by 60. So 7 hours 30 minutes = 7.50 decimal hours, and 7 hours 45 minutes = 7.75. Payroll systems and invoicing software almost always use decimal hours for calculations.
How is overtime calculated?
The calculator accumulates your hours across the week. Once the running total exceeds the overtime threshold (default 40 hours), any additional hours are flagged as overtime and paid at the overtime multiplier you set. For example, with a 40-hour threshold and 1.5x rate, the 41st hour and beyond are paid at 1.5 times your base rate.
What is time rounding and should I use it?
Time rounding adjusts each clock-in and clock-out to the nearest set interval (5, 15, or 30 minutes) before computing hours. Many employers use 15-minute rounding, which is legal in many jurisdictions as long as the policy is applied consistently and does not systematically reduce employee pay. If your employer does not round, choose "No rounding" for exact times.
Does this calculator handle overnight shifts?
Yes. If your clock-out time is earlier than your clock-in time (for example, clock in at 22:00, clock out at 06:00), the calculator automatically adds 24 hours to the clock-out time to get the correct shift length of 8 hours.
How do I calculate pay for a biweekly or monthly period?
This calculator covers one week at a time, which is the standard payroll period for overtime rules. For a two-week pay period, calculate each week separately and add the gross pay figures together. Note that overtime is typically evaluated on a per-week basis, not across the full biweekly or monthly period.
Why does my gross pay not include taxes?
This calculator shows gross pay only, which is the total before income tax, Social Security, Medicare, and any other deductions. Your take-home (net) pay depends on your filing status, allowances, state taxes, and voluntary deductions like health insurance or retirement contributions, all of which vary by individual.