What Is an Hour?

An hour is a period equal to 60 minutes. A minute consists of 60 seconds, and a second is defined as the duration of 9,192,631,770 cycles of radiation from the transition between two levels of the cesium-133 atom.

A single day has 24 hours, and people commonly use either a 12-hour clock or a 24-hour clock to measure time.

12-Hour Clock

The 12-hour clock includes numbers from 1 to 12 and is widely used across the world in both analog and digital forms. Analog clocks typically do not indicate whether the time is in the morning or evening. However, digital 12-hour clocks use:

• AM (Ante Meridiem): Before midday (morning hours)
• PM (Post Meridiem): After midday (afternoon and evening hours)

For example:

• 12 AM denotes midnight
• 12 PM denotes noon

Using these terms helps eliminate confusion when reading the time.

24-Hour Clock

The 24-hour clock, often called military time, uses numbers from 0 to 23.

• 0:00 represents midnight
• A full day runs from 00:00 to 23:59

The 24-hour clock is an international standard and is used widely in military, aviation, and healthcare industries to avoid ambiguity in time representation.

How to Use Our Hours Calculator

Using the Monday Tools Hours Calculator is simple and efficient. Follow these steps to calculate hours accurately:

1. Visit the online hours calculator.
2. Choose your preferred time format (12-hour or 24-hour clock).
3. Enter the Start Time.
4. Enter the End Time.
5. Click the Calculate button to determine the number of hours between the two times.

The tool instantly processes your input and provides accurate results.

Calculate Hours Between Two Times

Do you need to know how many hours remain before an important event? Or the difference between 5:30 PM and 8:50 AM? Instead of manually calculating work hours, use our free Monday Tools Hours Calculator for instant results.

Calculate Work Hours in Minutes and Seconds

Wondering how many hours you worked? You can calculate work hours manually like this:

Example:

• 7:30 + 1:45 = ?
• 7:30 (30 minutes = 0.5 hours) = 7.5 hours
• 1:45 (45 minutes = 0.75 hours) = 1.75 hours
• Total: 7.5 + 1.75 = 9.25 hours

However, manual calculations can be time-consuming. Instead, use the Monday Tools Hourly Calculator to save time and eliminate errors.

Hours in Different Periods

Sometimes, you may need to calculate total hours over a specific period, such as a week, month, or year. Here’s a quick guide:

How Many Hours in a Year?

A standard year has 365 days:

• 365 × 24 = 8,760 hours

A leap year has 366 days:

• 366 × 24 = 8,784 hours

How Many Hours in a Month?

On average, a month has 730.5 hours, but it varies:

• January, March, May, July, August, October, December: 744 hours
• April, June, September, November: 730 hours
• February: 672 hours (non-leap year), 696 hours (leap year)

How Many Hours in a Week?

A week has 7 days:

• 7 × 24 = 168 hours

How Many Hours in a Day?

Each day has 24 hours.

Salary vs. Hourly Pay

What’s the Difference?

• Hourly Employees: Paid per hour worked (e.g., $20 per hour)
• Salaried Employees: Receive a fixed paycheck and benefits but do not earn extra for overtime

Using the Monday Tools Hourly Calculator, you can determine your earnings quickly by entering your work hours and pay rate.

High-Paying Hourly Jobs in the U.S.

Jobs That Pay Around $25/Hour

• Mental Health Counselors: $23.75
• Athletic Trainers: $24.12
• Education Teachers: $24.37
• Mechanics & Installers: $24.03
• Clinical Laboratory Technologists: $25.93

Jobs That Pay $100+/Hour

• Life Coach
• Underwater Welder
• Freelance Photographer
• Speechwriter
• Commercial Pilot
• Anesthesiologist
• Orthodontist

How to Calculate Your Hourly Salary

If you work full-time (40 hours/week) and get two weeks of vacation per year, you work approximately 2,000 hours annually.

To estimate your hourly salary:

1. Remove three zeros from your annual salary.
2. Divide by 2.

Example:

• If you earn $80,000 per year:
• Remove three zeros ($80)
• Divide by 2 ($40/hour)

To speed up this process, use the Monday Tools Salary Calculator.

FAQs

How Many Work Hours Are in a Typical Workday?

A standard workday is 8 hours, making it 40 hours per week and 2,080 hours per year.

How Many Hours Are Between 7:30 and 3:30?

From 7:30 AM to 3:30 PM = 8 hours or 480 minutes.

How Many Seconds in an Hour?

There are 3,600 seconds in an hour (60 minutes × 60 seconds).

How to Calculate Work Hours?

Use the Monday Tools Work Hours Calculator to quickly and accurately determine your work hours by entering your start and end times.