Time Card Calculator
Add up the hours you worked each day, minus unpaid breaks, to get your weekly total in hours and minutes and in decimal hours for payroll.
Updated · Free, no sign-up · Estimates only
Enter your hours for the week
Result
This is an estimate. Your employer’s timekeeping system may round punches (often to the nearest 5 or 15 minutes) and some states have daily overtime rules, so your official hours can differ. Pay shown is before tax. This is general information, not legal or payroll advice.
Quick answer
For each day, subtract the start time from the end time, then subtract any unpaid break. A 9:00 AM to 5:30 PM shift with a 30-minute lunch is 8 hours. To turn minutes into decimal hours for payroll, divide by 60: 7 hours 45 minutes is 7 + 45 ÷ 60 = 7.75 hours.
How to use the time card calculator
- For each day you worked, enter the time you started and finished.
- Enter any unpaid break in minutes, such as 30 for a half-hour lunch.
- Optionally, add your hourly rate to see your pay, including overtime.
- Press Calculate to see each day’s hours and your weekly total.
How hours are calculated
Hours worked = end time − start time − unpaid break
Decimal hours = hours + minutes ÷ 60
Overtime hours = weekly total − 40 (if more than 40)
If the end time is earlier than the start time, the shift is treated as running past midnight, so 10:00 PM to 6:00 AM counts as 8 hours.
Worked example
A five-day week with a half-hour lunch
Monday to Friday, 8:30 AM to 5:15 PM with a 30-minute unpaid lunch, is 8 hours 15 minutes a day. That’s 41 hours 15 minutes for the week, or 41.25 decimal hours. At $20 an hour, 40 regular hours pay $800 and 1.25 overtime hours at $30 pay $37.50, for $837.50 before tax.
Minutes to decimal hours
| Minutes | Decimal hours |
|---|---|
| 15 minutes | 0.25 |
| 30 minutes | 0.50 |
| 45 minutes | 0.75 |
| 20 minutes | 0.33 |
| 40 minutes | 0.67 |
Breaks and overtime rules
Federal law doesn’t require meal breaks, but short breaks of about 5 to 20 minutes are generally paid work time, and meal breaks of 30 minutes or more can be unpaid if you’re fully relieved of duty. Several states require meal or rest breaks. Under the federal Fair Labor Standards Act (FLSA), non-exempt employees earn overtime at 1.5 times their regular rate for hours over 40 in a workweek. California and a few other states also have daily overtime. Our overtime calculator handles double time and the federal overtime deduction.
When you’d actually use a time card calculator
- Filling in a weekly timesheet. Turn clock-in and clock-out times into the decimal hours payroll asks for.
- Checking your paycheck. Make sure every hour, and any overtime, was counted.
- Tracking hours for a side job or babysitter. Add up a week of irregular shifts in seconds.
How we calculate
Each day’s hours are the minutes between your start and end times, minus the break you enter. A shift that ends earlier than it starts is counted as running past midnight. We add the days for the weekly total and show it in hours and minutes and in decimal hours, rounded to two decimal places. If you enter a rate, hours over your overtime threshold are paid at 1.5 times the rate. We don’t apply rounding rules or daily overtime.
Frequently asked questions
How do I calculate hours worked?
Subtract your start time from your end time, then subtract any unpaid break. 8:30 AM to 5:15 PM is 8 hours 45 minutes; with a 30-minute lunch it's 8 hours 15 minutes.
How do I convert minutes to decimal hours?
Divide the minutes by 60. 15 minutes is 0.25 hours, 30 minutes is 0.5 and 45 minutes is 0.75, so 7 hours 45 minutes is 7.75 hours.
How are overnight shifts counted?
If a shift ends after midnight, the end time is earlier than the start time. The calculator treats it as finishing the next day, so 10:00 PM to 6:00 AM counts as 8 hours.
Are lunch breaks paid?
Under federal rules, short breaks of about 5 to 20 minutes are usually paid, while meal breaks of 30 minutes or more can be unpaid if you're fully relieved of duty. Some states have their own break rules.
Does my employer round my time?
Many employers round clock-ins and clock-outs to the nearest 5, 6 or 15 minutes. Federal rules allow this only if it evens out over time and doesn't consistently underpay you.
When does overtime start?
For most hourly employees, overtime starts after 40 hours in a workweek under federal law. Some states, such as California, also count daily overtime.