Calculate total working hours between two times.
| Total Hours | |
| Total Minutes |
The Hours Calculator helps you calculate total working hours between two times. It is useful for tracking work shifts, calculating payroll hours, estimating project time, and managing schedules accurately.
An hour is most commonly defined as a period of 60 minutes, where each minute consists of 60 seconds. There are 24 hours in a day, making hours one of the most widely used units of time measurement.
The 12-hour clock uses numbers from 1 to 12 and divides the day into two periods: AM and PM. AM (ante meridiem) refers to times before noon, while PM (post meridiem) refers to times after noon.
By convention, 12 AM represents midnight and 12 PM represents noon. Using terms like “12 midnight” and “12 noon” helps avoid confusion.
The 24-hour clock uses numbers from 0 to 23 and runs from midnight to midnight. For example, 00:00 indicates midnight and 13:00 corresponds to 1:00 PM.
This format is widely used internationally and is often referred to as military time because it avoids ambiguity.
| Description | Hours |
|---|---|
| Hours in a day | 24 |
| Hours in a week | 168 |
| Hours in a month (28 days) | 672 |
| Hours in a month (30 days) | 720 |
| Hours in a month (31 days) | 744 |
| Hours in a year (365 days) | 8,760 |
| Hours in a leap year | 8,784 |
| Hours in a decade (avg.) | 87,660 |
| Hours in a century | 876,600 |
A 12-hour clock divides the day into AM and PM, while a 24-hour clock runs continuously from 00 to 23.
Yes, it is ideal for calculating work hours, shifts, and payroll-related time.
Because it avoids ambiguity between morning and evening times.
Yes, it follows standard time measurement rules used worldwide.
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