Convert Time from Hour to Minute (h to min)

Hour to Minute Conversion Formula

To convert from Hour (h) to Minute (min), use the following formula:

Example

Let's convert 5 Hour (h) to Minute (min).

Using the formula:

Therefore, 5 Hour (h) is equal to $300$ Minute (min).

What is an Hour (h)?

An hour (h) is a universal unit of time equal to 60 minutes, or 3,600 seconds.

Why Is a Day Divided into 24 Hours?

The practice of breaking the day into smaller parts goes back to ancient civilizations, especially the Egyptians. They divided daylight and nighttime into 12 hours each, creating the 24-hour day.

During the day, they used shadow clocks—an early form of sundial—to tell the hours, and at night, they tracked groups of stars called decans to mark the hours.

This system, known as a duodecimal (base-12) system, was convenient as the number 12 has many factors, making it easy to subdivide.

Why Does an Hour Have 60 Minutes?

The reason we divide an hour into 60 minutes and a minute into 60 seconds comes from the ancient Babylonians. They used a sexagesimal (base-60) numbering system for their mathematical and astronomical calculations.

This system was likely adopted because 60 is a highly composite number, having twelve factors (1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 60). This made it exceptionally easy to calculate fractions.

The Greek astronomers Hipparchus and Ptolemy later adopted this system for their astronomical work, solidifying its use in measuring time and angles (like the 360 degrees in a circle).

How Do We Define an Hour Today?

While an hour is commonly defined as 3,600 seconds, its ultimate precision is tied to the modern definition of a second.

According to the International System of Units (SI), a second is the duration of 9,192,631,770 cycles of the radiation emitted during the transition between two energy levels of the caesium-133 atom.

Therefore, a modern hour equals exactly 3,600 seconds — 3,600 times this atomic standard — making it an exceptionally stable, universally consistent unit of time verified by atomic clocks around the world.

What is a Minute (min)?

A minute (min) is a unit of time equal to 60 seconds.

It is one of the most common ways we measure time, with 60 minutes making up one hour. While we use it every day, the minute has a fascinating history and is used for more than just telling time.

Where Did the 60-Second Minute Come From?

The reason a minute has 60 seconds and an hour has 60 minutes dates back to the ancient Babylonians. Around 2000 B.C., they used a sexagesimal (base-60) numbering system, which they inherited from the Sumerians.

This system was efficient because the number 60 can be divided by many other numbers (1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30), which made calculating fractions simple.

The word "minute" itself comes from the Latin phrase pars minuta prima, meaning the "first small part" of an hour.

What is an Arcminute? The Minute in Geography

Beyond timekeeping, the minute is also a critical unit for measuring angles in geography and navigation. An "arcminute" (also called a minute of arc) is an angular measurement equal to 1/60th of a degree.

You will see arcminutes used in latitude and longitude coordinates to pinpoint exact locations on a map. For example, a location might be written as 34° 05' N, where '05' stands for five arcminutes.

As a fun fact, one nautical mile was historically defined as exactly one minute of arc of the Earth's latitude.

What is the International System of Units (SI)?

Hour to Minute Conversion Table

Here are some quick reference conversions from Hour (h) to Minute (min):