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Hours Calculator

Fill in when you started and finished each day and how long your unpaid breaks were to get the week’s total hours, the overtime past 40 hours and your gross pay. For a single span of time or adding durations, the time calculator is the better fit.

Days worked
Pay

Optional. Leave blank to total hours only.

US federal rule: hours over 40 in a workweek at 1.5 × the regular rate.

Result

Total hours worked

42:30

42.5 hours in decimal, over 5 days

Decimal hours
42.5
Regular hours
40:00 (40)
Overtime hours
2:30 (2.5)
Regular pay40 h × $22.00
$880.00
Overtime pay2.5 h × $33.00
$82.50
Gross pay for the week
$962.50
Show the working
  1. Add each day’s hours (end − start − break)8:30 + 8:30 + 8:30 + 8:30 + 8:30 = 42:30 = 42.5 h
  2. Regular hours = the lower of total and the overtime thresholdmin(42.5, 40) = 40 h
  3. Overtime hours = total − regular42.5 − 40 = 2.5 h
  4. Gross pay = regular hours × rate + overtime hours × overtime rate40 × $22.00 + 2.5 × $33.00 = $962.50

Gross pay is before tax and deductions. Employers may round punch times under their own policy, so a payslip can differ by a few minutes.

Hours by day

Start, end, break and paid hours for each day. Scroll sideways to see all columns.
DayStartEndUnpaid breakHours
Monday8:00 AM5:00 PM30 min8:30 (8.5)
Tuesday8:00 AM5:00 PM30 min8:30 (8.5)
Wednesday8:00 AM5:00 PM30 min8:30 (8.5)
Thursday8:00 AM5:00 PM30 min8:30 (8.5)
Friday8:00 AM5:00 PM30 min8:30 (8.5)
SaturdayOff———
SundayOff———

How to add up your work hours

For each day you worked, subtract the start time from the end time and take off any unpaid break. Adding the days gives the week’s total. Doing this by hand trips people up in two places: minutes don’t add like decimals (8:30 + 8:45 is 17:15, not 16.75), and shifts that run past midnight give a negative difference.

The calculator handles both. Tick the days you worked, enter the times as they appear on your time card, and it treats an end time earlier than the start as the next morning. The total is shown as hours and minutes (42:30) and as decimal hours (42.5), the form most payroll systems use.

Add your hourly rate to see gross pay. With overtime switched on, hours beyond the weekly threshold are paid at the overtime rate, 40 hours and 1.5× by default. To add or subtract arbitrary lengths of time instead, use the time calculator.

The formulas

Hours = end − start − break

If the end is earlier than the start, 24 hours are added to the end first. Weekly totals and pay:

Regular = min(total, T) · Overtime = total − regular

Pay = regular × rate + overtime × rate × m

T
overtime threshold for the week (40 hours under US federal law)
m
overtime multiplier (1.5 under US federal law)
rate
your regular hourly rate

To turn minutes into decimal hours, divide by 60: 30 minutes is 0.5 hours, 15 minutes is 0.25, 45 minutes is 0.75.

Worked example

You work Monday to Friday from 8:00 AM to 5:00 PM with a 30-minute unpaid lunch and earn $22 an hour (the calculator’s starting values).

  1. Each day: 9 hours − 30 minutes = 8:30, or 8.5 hours.
  2. Week: 5 × 8.5 = 42.5 hours (42:30).
  3. Regular hours: 40. Overtime: 42.5 − 40 = 2.5 hours.
  4. Regular pay: 40 × $22.00 = $880.00. Overtime pay: 2.5 × $33.00 = $82.50.
  5. Gross pay: $962.50.

A night shift from 10:00 PM to 6:30 AM with a 30-minute break counts as 8 hours: the end is taken as 6:30 the next morning, 8½ hours after the start, minus the break.

Overtime rules and breaks

  • Federal overtime is weekly. Under the Fair Labor Standards Act, covered, non-exempt employees must get at least 1.5 times their regular rate for hours over 40 in a workweek. The FLSA does not require overtime for long days on their own, or for weekends and holidays as such.
  • A workweek is fixed. The Department of Labor defines it as a regularly recurring period of 168 hours, seven consecutive 24-hour periods. If your employer’s workweek starts on another day, enter its seven days in order; the day names are only labels.
  • Some states go further. Certain states add daily overtime or other rules on top of the federal one. This calculator applies only a weekly threshold, which you can change; check your state labor department for daily rules.
  • Short breaks are paid time. Federal rules treat rest breaks of about 5 to 20 minutes as hours worked; bona fide meal periods, typically 30 minutes or more, are not. Only enter breaks you aren’t paid for.
  • Exempt employees (many salaried roles) aren’t entitled to overtime pay. Turn overtime off to total hours at a single rate.

From weekly pay to annual

To see what an hourly wage adds up to over a year, use the salary calculator; for take-home pay after federal tax, the income tax calculator.

Frequently asked questions

How do I convert hours and minutes to decimal hours?

Divide the minutes by 60 and add them to the hours. 7 hours 45 minutes is 7 + 45 ÷ 60 = 7.75 hours. The calculator shows every total in both forms.

How do I calculate hours for a shift that goes past midnight?

Add 24 hours to the end time, then subtract the start. A shift from 10:00 PM to 6:30 AM is 30:30 − 22:00 = 8 hours 30 minutes before breaks. The calculator does this automatically when the end time is earlier than the start.

When do I get overtime pay?

Under the federal Fair Labor Standards Act, non-exempt employees earn at least time and a half for hours over 40 in a workweek. Some states have additional rules, such as daily overtime, and your contract may be more generous.

Are lunch breaks counted as hours worked?

Under federal rules, a meal period of typically 30 minutes or more is not work time. Short rest breaks of about 5 to 20 minutes are counted as work time and should not be entered as unpaid breaks.

Is gross pay the same as my paycheck?

No. Gross pay is what you earn before income tax, Social Security, Medicare and other deductions such as insurance or retirement contributions are taken out. Your take-home pay will be lower.

Sources

Last reviewed September 19, 2026