Scale Explorer

Nature

How tall is Mauna Kea?

Mauna Kea · Island of Hawai'i, USA

Height from ocean floor to summit
≈ 10,211 m 33,501 ft approx.
Height above sea level
4,207 m 13,800 ft
Depth of base below sea level
≈ 6,000 m 20,000 ft approx.
Show
Human, Mount Fuji, Mount Everest, Mauna Kea drawn to the same scaleHuman: height 1.61–1.75 m (too small to see at this scale). Mount Fuji: height above sea level 3,776 m. Mount Everest: height above sea level 8,848.86 m. Mauna Kea: height from ocean floor to summit ≈ 10,211 m.Human: 1.61–1.75 m (too small to see at this scale)Mount Fuji: 3,776 mMount Everest: 8,848.86 mMauna Kea: ≈ 10,211 mMauna Kea≈ 10,211 mMount Everest8,848.86 mMount Fuji3,776 mHuman1.61–1.75 m · too small to see

Human is too small to see at this scale and is marked with ▲.

Everything is drawn to the same scale, standing on the same ground line. Silhouettes are simplified outlines scaled to the measured dimension. A faded outline shows the top of a size range.

Compare Mauna Kea with something else →

Zoom out from an average adult to Mauna Kea

Mauna Kea is too big to show next to an average adult in one picture, so here it is in 5 steps. Each step is drawn to its own scale and zooms out from the step before.

  1. Step 1 of 5 Human → Megalodon

    A megalodon is about 8.6–15 times as long as an average adult is tall.

    Human, Megalodon drawn to the same scaleHuman: height 1.61–1.75 m. Megalodon: maximum length (estimates) 15–24.3 m.Human: 1.61–1.75 mMegalodon: 15–24.3 mMegalodon15–24.3 mHuman1.61–1.75 m
    Step 1: Human and Megalodon at the same scale.

  2. Step 2 of 5 Megalodon → Great Pyramid of Giza

    The Great Pyramid of Giza is about 5.6–9.1 times as tall as a megalodon is long.

    Megalodon, Great Pyramid of Giza drawn to the same scaleMegalodon: maximum length (estimates) 15–24.3 m. Great Pyramid of Giza: current height ≈ 137 m.Megalodon: 15–24.3 mGreat Pyramid of Giza: ≈ 137 mGreat Pyramid of Giza≈ 137 mMegalodon15–24.3 m
    Step 2: Megalodon and Great Pyramid of Giza at the same scale.

  3. Step 3 of 5 Great Pyramid of Giza → Golden Gate Bridge

    The Golden Gate Bridge is about 20 times as long as the Great Pyramid of Giza is tall.

    Great Pyramid of Giza, Golden Gate Bridge drawn to the same scaleGreat Pyramid of Giza: current height ≈ 137 m. Golden Gate Bridge: total length 2,737 m.Great Pyramid of Giza: ≈ 137 mGolden Gate Bridge: 2,737 mGolden Gate Bridge2,737 mGreat Pyramid of Giza≈ 137 m
    Step 3: Great Pyramid of Giza and Golden Gate Bridge at the same scale.

  4. Step 4 of 5 Golden Gate Bridge → Mount Everest

    Mount Everest is about 3.2 times as tall as the Golden Gate Bridge is long.

    Golden Gate Bridge, Mount Everest drawn to the same scaleGolden Gate Bridge: total length 2,737 m. Mount Everest: height above sea level 8,848.86 m.Golden Gate Bridge: 2,737 mMount Everest: 8,848.86 mMount Everest8,848.86 mGolden Gate Bridge2,737 m
    Step 4: Golden Gate Bridge and Mount Everest at the same scale.

  5. Step 5 of 5 Mount Everest → Mauna Kea

    Mauna Kea is about 1.2 times as tall as Mount Everest.

    Mount Everest, Mauna Kea drawn to the same scaleMount Everest: height above sea level 8,848.86 m. Mauna Kea: height from ocean floor to summit ≈ 10,211 m.Mount Everest: 8,848.86 mMauna Kea: ≈ 10,211 mMauna Kea≈ 10,211 mMount Everest8,848.86 m
    Step 5: Mount Everest and Mauna Kea at the same scale.

Dimensions

MeasurementMetricImperialNotesSource
Height above sea level 4,207 m 13,800 ft Summit elevation above sea level; USGS gives 4,207.3 m (13,803 ft) [1]
Height from ocean floor to summit ≈ 10,211 m ≈ 33,501 ft Total height from the deep ocean floor, which USGS describes as 'nearly 33,500 feet (10,211 meters)'. Approximate [2]
Depth of base below sea level ≈ 6,000 m ≈ 20,000 ft How far the volcano extends below sea level to meet the ocean floor (about 19,700 ft). Approximate [2]

About Mauna Kea

Mauna Kea is a volcano on the Island of Hawai'i and the highest peak in the state, reaching 4,207 m (13,803 ft) above sea level. Most of the mountain lies under the Pacific: the USGS says it extends about 6,000 m below sea level to the ocean floor, giving a total height of about 10,211 m from base to summit. Measured that way it is taller than Mount Everest, and its summit hosts a large group of astronomical observatories.

  • USGS says Mauna Kea's total height from the ocean floor is considerably greater than the height of Mount Everest above sea level. [2]
  • Mauna Kea is slightly taller than neighbouring Mauna Loa above sea level, but Mauna Loa's base is much deeper and it is far larger in volume. [3] [2]
  • The University of Hawai'i Institute for Astronomy says the summit sits above 40 percent of Earth's atmosphere, and it describes Mauna Kea as rising 9,750 m (32,000 ft) from the ocean floor. [4]

How many fit?

  • ≈ 6,100 × Human · height lined up end to end match the Mauna Kea · height from ocean floor to summit
  • ≈ 19 × One World Trade Center · height (architectural) lined up end to end match the Mauna Kea · height from ocean floor to summit

Counts divide one sourced figure by another. "End to end" uses each object's main measurement; weight and volume rows appear only when both figures are sourced.

How it compares

  • 6,100× Mauna Kea is about 6,100 times as tall as an average adult. See side by side
  • 19× Mauna Kea is about 19 times as tall as One World Trade Center. See side by side
  • 12× Mauna Kea is about 12 times as tall as the Burj Khalifa. See side by side
  • 3.7× Mauna Kea is about 3.7 times as tall as the Golden Gate Bridge is long. See side by side
  • 2.7× Mauna Kea is about 2.7 times as tall as Mount Fuji. See side by side
  • 1.2× Mauna Kea is about 1.2 times as tall as Mount Everest. See side by side

Factors compare the height from ocean floor to summit of Mauna Kea with each object’s own main measurement (height for a human). Where a size varies, the factor is given as a range.

Notes on these figures

  • Summit figures differ slightly between sources: the USGS Mauna Kea page gives 4,207 m (13,803 ft), while the USGS FAQ and the University of Hawai'i Institute for Astronomy use an older 4,205 m (13,796 ft).
  • Base-to-summit height depends on where the base is taken to be. USGS gives about 10,211 m; the University of Hawai'i Institute for Astronomy gives 9,750 m (32,000 ft).
  • The headline height is above sea level so it compares directly with other mountains; the base-to-summit figure is listed separately.
  • The mountain outline is illustrative; only its height is to scale.

Sources

  1. U.S. Geological Survey, Hawaiian Volcano Observatory, Mauna Kea. Accessed 25 September 2026.
  2. U.S. Geological Survey, How big are the Hawaiian volcanoes?. Accessed 25 September 2026.
  3. U.S. Geological Survey, Hawaiian Volcano Observatory, Volcano Watch - Hawaiian volcanoes and their Olympic moments: tall, bigger, longer, and deeper. Accessed 25 September 2026.
  4. University of Hawai'i Institute for Astronomy, Maunakea Observatories. Accessed 25 September 2026.

Related objects