Fact Checked

What is the World's Highest Mountain?

Vanessa Harvey
Vanessa Harvey

A mountain is a land mass that rises above its surroundings, usually to a peak, and which is higher and generally steeper than a hill. The height of a mountain usually is measured from sea level to its summit. Using this method, Mount Everest, located on the border of Tibet and Nepal and measured at 29,028 feet (8,848 m), is considered to be the world's highest mountain. A measurement taken in 1999 of 29,035 feet (8,850 m) is considered by some to be more accurate, but it is not officially recognized.

There are two other accepted methods for determining the height of a mountain. One involves measuring the mountain from its base. When this method is employed, the results are generally said to indicate how tall a mountain is instead of how high it is. For example, Mount Mauna Kea, also known as "White Mountain," is a volcano of Hawaii whose base is on the floor of the Pacific Ocean. Mauna Kea, measured from its base to its peak, is 33,464 feet (10,200 m), making it the world's tallest mountain, even though it rises only about 13,800 feet (4,200 m) above seal level.

Mount Everest.
Mount Everest.

The tallest mountain might not be the highest, and the highest mountain might not be the tallest. Generally, mountain climbers seek to climb the higher mountains before the taller ones. This is because the highest mountain is measured from sea level, so it reaches higher into the heavens than the tallest mountain. This tends to give the highest mountains a more majestic appearance than the tallest ones.

Man looking up at Mt. Everest.
Man looking up at Mt. Everest.

A third method for determining the highest mountain involves measuring its elevation from the center of Earth. Using this method, Mount Chimborazo in the Central American country of Ecuador, is the world's highest mountain at 3,966 miles (6,384 kilometers) from Earth's center. Mount Chimborazo is located very close to Earth's equator, where the planet is widest, given that it is an oblate spheroid rather than a perfect sphere. Although Mount Everest rises higher above the sea than does Mount Chimborazo, Mount Everest's summit is closer to the center of Earth by approximately 1.35 miles (2.2 kilometers).

A map of the world.
A map of the world.

To give an accurate answer to the question of what the world's highest mountain is, one would need to know which method of measurement is to be employed. If the mountain is measured from sea level, Mount Everest is Earth's highest mountain. When measuring from the base to the summit, Mount Mauna Kea is the world's tallest mountain. Finally, if the question specifically asks for the highest mountain above the center of the Earth, Mount Chimborazo is the correct answer.

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Discussion Comments


I don't understand what the appeal is for so many people who attempt to climb mountains even though they put themselves at great risk. I have lived in the mountains all of my life, and I have never had an urge to climb to the top of a mountain in freezing weather, or any type of weather for that matter.

I loved the views and the changes in weather where I live, but I prefer to look at the mountains rather than conquer them.


I spent a lot of time in the Appalachian Mountains growing up. My family would go there for at least a week for vacation each year. I grew up closer to the beach, so these seemed like really large mountains to me, and I guess they are pretty large relative to some other smaller chains. However, when I finally got the chance to visit Colorado my opinion of the Appalachians changed.

When I saw the Rocky Mountains in Colorado, I felt like I was seeing mountains for the first time. They looked enormous. I can remember driving a rented car up the roads leading through the mountains. I thought the engine might blow up because the car was working so hard to get up the steep inclines.


I was watching a reporter interview a college football player on TV the other day. The player was from Hawaii, and he was telling different things about his home state. One of the things he mentioned was that Hawaii had the tallest mountain in the world from base to peak.

I thought the player had misspoken because I always thought Mount Everest was the world's tallest mountain. Now that I see the distinction between the highest mountain and the tallest mountain, I understand what the player was saying.

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    • Mount Everest.
      By: Göran (Kartläsarn)
      Mount Everest.
    • Man looking up at Mt. Everest.
      By: QiangBa DanZhen
      Man looking up at Mt. Everest.
    • A map of the world.
      By: Kheng Guan Toh
      A map of the world.