Hours Calculator

Convert everything to minutes, add them, then convert back. Example: 3 hours 45 minutes + 2 hours 50 minutes = (3×60+45) + (2×60+50) = 225 + 170 = 395 minutes = 6 hours 35 minutes (395 ÷ 60 = 6 remainder 35). This calculator does this automatically. If the result exceeds 24 hours, it shows the total in hours and minutes without wrapping to the next day — useful for calculating total work hours over multiple days.

Use the Duration tab. Enter your start time and end time, then optionally subtract your break duration. The calculator gives you the net working hours. Example: 9:00 AM to 5:30 PM with a 30-minute lunch break = 8.5 hours gross − 0.5 hours break = 8 hours net. If your shift crosses midnight (e.g., 10 PM to 6 AM), the calculator automatically assumes the end time is the following day and calculates correctly.

Divide the minutes by 60 and add to the whole hours. Examples: 2h 30m = 2 + 30/60 = 2.5 hours. 1h 45m = 1 + 45/60 = 1.75 hours. 7h 20m = 7 + 20/60 = 7.333 hours. Decimal hours are used in payroll systems — multiply by your hourly rate to get pay. 8.5 hours × $25/hour = $212.50. This calculator always shows both HH:MM and decimal formats in the results.

1 day = 24 hours = 1,440 minutes = 86,400 seconds. 1 week = 7 days = 168 hours = 10,080 minutes. 1 month (average) = 30.44 days = 730.5 hours = 43,830 minutes. 1 year = 365 days = 8,760 hours (8,784 in a leap year) = 525,600 minutes. For work-related calculations: a standard 40-hour work week = 2,080 hours per year. A full-time employee works approximately 1,960 productive hours per year after excluding holidays and vacation.

In the US, overtime is generally any hours worked over 40 in a single workweek (Fair Labor Standards Act). Use the Timesheet tab to add all your work sessions for the week. Any total over 40h 00m represents overtime, typically paid at 1.5× the regular hourly rate. Some states (like California) also require daily overtime for hours over 8 per day, and double-time for hours over 12. Always verify your employer's specific overtime policy and local labor laws.

A timesheet records the hours worked in each shift, typically with start time, end time, and break time for each day. Use the Timesheet tab to enter multiple sessions. Best practice: record times accurately at the start and end of each shift rather than estimating later. Round to the nearest quarter-hour if your employer uses that convention (e.g., 9:07 rounds to 9:00 or 9:15 depending on company policy). Total weekly hours are compared against your scheduled hours to calculate regular pay, overtime, and any shortfall.

Military time (also called 24-hour time) runs from 0000 to 2359 without AM/PM. To convert from 12-hour to 24-hour: AM times stay the same (9:30 AM = 09:30), except midnight which becomes 00:00. PM times: add 12 to the hour (1:30 PM = 13:30, 5:45 PM = 17:45, 12:00 PM noon stays 12:00). To convert back from 24-hour to 12-hour: subtract 12 from any hour over 12 (18:30 = 6:30 PM). This calculator accepts both 12-hour (with AM/PM) and 24-hour formats in the hour input field (0–23).

Enter your hourly rate in the Timesheet tab. The calculator multiplies total decimal hours by your hourly rate. Example: 38.5 hours × $22.50/hour = $866.25 gross pay. For mixed regular and overtime: total regular pay = 40 × $22.50 = $900. Overtime pay (if 38.5 < 40, no overtime in this example). If you worked 43 hours: regular pay = 40 × $22.50 = $900 + overtime = 3 × $33.75 (1.5×) = $101.25. Total gross = $1,001.25. This calculator shows gross pay only; deductions depend on your tax situation.

A standard US full-time employee works 52 weeks × 40 hours = 2,080 hours per year before any deductions. Subtract federal holidays (11 in the US) = 11 × 8 = 88 hours, leaving 1,992 hours. Subtract typical 2 weeks vacation = 80 hours, leaving approximately 1,912 productive hours. In the UK, a standard work year is also around 2,080 hours (40h × 52 weeks), but typical workers receive 28 days paid leave (5.6 weeks), reducing productive hours to about 1,856. Part-time hours scale proportionally.

The number of weekends in a month depends on which day of the week the month starts and how many days it has. A 31-day month starting on Saturday has 5 full weekends. A 28-day February can have as few as 4 weekends and only 20 weekdays. This matters for businesses that pay bi-weekly or for calculating monthly work hours. In a year with 261 weekdays, some months contribute 23 weekdays and others only 20, affecting monthly payroll calculations. This is why some payroll periods have 3 pay cycles in a month for bi-weekly employees.