Hours calculator

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Hours calculator- how does it work?

Hours calculator!

Hours calculator is an easy-to-use online tool that is helpful to calculate time duration in hours and minutes between two sets of times. The hours calculator is also known as Time Duration Calculator. You can calculate easily by entering the starting and ending time and then pressing calculate button to get the exact result.

You can manually enter the time from where to start and end the calculation. The algorithm behind the calculator gives you the result in hours and minutes. It is very simple, easy, and fast usage.

hours calculator

How does the calculator work?

This hours calculator tool uses predefined algorithms to calculate the time. A simple arithmetic calculation is involved in calculating the time duration. The below example gives you a better understanding of the process:


Find out the hours and minutes between the following times; Start time = 10:05 am, End time = 12:30 pm.

First, subtract the starting time hours from the ending time hours.

12 - 10 = 2

Subtract the starting time from the ending time

30 - 5 = 25

You can get the result in hours and minutes. Now combine them to get the final result.

Time duration = 2 hours 25 minutes

You know that 1 Hour = 60 minutes,

Total minutes = 60 + 60 + 25 = 145

The above process runs behind the hours and minutes calculator. The process takes less than a second and is easy to calculate.

Work Hours calculator

The work hours calculator adds up your work timesheet and calculates work hours for payroll. The online time clock has a standard 12-hour work clock with am and pm or a 24-hour clock for military time. It calculates total work hours with lunch and breaks.

How to calculate work hours?

  • Enter numbers such as 1215 for 12:15 or 137 for 1:37, with a colon, which is optional.
  • On a 12-hour clock, you can enter a single from 1 through 12 to indicate 1:00 through 12:00 on the hour.
  • The Tab key moves through the input boxes or clicks on each.
  • On a 12-hour clock, use 12:00 pm for noon and 12:00 am for midnight.
  • Adjust in settings to customize your timesheet.

Calculator Input settings of Time Card settings

Week begins on

Choose the day of the week your weekly pay period starts.

Clock format

Choose whether you enter standard 12-hour work time with am and pm or 24-hour military time.

Deduct Breaks

Use this function to deduct the total lunch or break time each day. Enter break times in the total number of minutes.

OT Overtime

The Time Card summary shows regular work hours and overtime hours. Overtime occurs after 40 hours per week. Change 40 to another value as necessary.

Rounds Inputs to Nearest

Based on U.S. Federal Regulations, employers round clock time offer three ways to round Start Times and End Times each day:

  • Fifteen minutes is known as the 7-minute rule. Decimal hours are rounded to the nearest quarter hour with two decimal places (.00, .25, .50, and .75)
  • Six minutes are also referred to as 1/10 or one-tenth of an hour. Decimal hours are rounded to the nearest tenth of an hour with two decimal places.

Enter = Tab

In settings Enter = Tab, you can advance to the next input field using the Enter key. It is convenient for users to enter numbers with a keyboard keypad using one hand.

Enter through all input boxes to reach the calculate button, and you can use a trackpad or mouse to click the calculate button.

Save Last Inputs

Check if you want the browser to remember your latest time card work hours entries. Check No to clear your time card inputs when you leave the calculator.

Why use the Hours calculator?

Hours calculator used in many real-lives, from personal usage to business applications.

Manage Personal Time Card

Using our tool, you can easily manage and update your time card. You can check how many hours you have worked on any task or project.

Payroll Management

You can use this tool to manage their payroll effectively. It will save you time and effort.


If you are planning something and know the time left, you can use it to know how much exact time remains.

Features for hours calculator!

The online hour's calculator is loaded with many features, which are discussed below:

Fast calculation: Get instant hours and minutes in less than a second. These processes take more time when you go for a manual calculation.

Accurate Results: The tool uses predefined algorithms for calculating the time. Every input goes through the same process. The result can always be correct.

Simple User Interface: The tool's user interface is simple, and you can easily use it without any trouble.

Free to Use: The tool is free to use. No hidden charges or anything.

No Signup or Login: This is a simple web application that requires being loaded on your web browser. You don't need to log in or register to use it.

Handy and Lightweight: It is a cross-platform which can be used anywhere on any device. You need a Smartphone or computer with internet access to access it.

How can you calculate the hour?

An hour can be defined as a period equal to 60 minutes, whereas a minute is equal to 60 seconds. There are also 2 hours in a day or a 12-hour clock.

12-hour clock

A 12-hour clock depends on the numbers 1-12. Most analog watches and clocks may not indicate the time in the morning or evening. On digital clocks,

  • AM stands for ante meridiem, which refers to midday
  • PM stands for post meridiem, which refers to afternoon
  • 12 am denotes midnight, while 12 pm denotes noon
  • 12 midnight and 12 noon remove ambiguity.

24-hour clock

A 24-hour clock uses 0-23, where 00:00 indicates midnight. The hours from 0-11 denote the AM hours on a 12-hour clock, and hours 12-23 denote PM hours.

Hours in different periods

Hours in a day 24

Hours in a week 168

Hours in a month

  • 672 for a 28-day month
  • 696 for a 29-day month
  • 720 for a 30-day month
  • 744 for a 31-day month
  • 730.5 On average

Hours in a year

  • 8760 for a 365-day year
  • 8,784 for a 366-day year
  • 8766 on average

Hours in a decade

  • 87,648 for a 2-leap-year decade
  • 87,672 for a 3-leap-year decade
  • 87,660 on average


An hour calculator is an easy method to calculate. You have to give the inputs by entering starting and ending times and finally hit the calculator button to get a result. This calculator saves time and gives you the exact result within seconds. Use an hour calculator and save time.

Efficiently manage your work hours and streamline payroll with the Work Hours Calculator. Calculate total work hours, deduct breaks, and customize your timesheet settings to suit your needs.


Q: How many times can I use the Hours calculator?

A: You can use the hours' calculator unlimited times, and there is no limit for usage.

Q: What is the time format supported?

A: The tool supports the 12-hour time format; ensure that the time you entered is in the 12-hour format.

Q: Can I use this tool on mobile?

A: Yes, you can use this tool on mobile, which works fine and is also a handy device.

Q: How to refresh the tool for the next calculation?

A: Use the Reset button to refresh the calculator and make it used for new calculations.

Q: Is it noon AM or PM?

A: 12:00 pm is noon, and 12:00 am is midnight.