Hoover Dam
Hoover Dam is a concrete barrier on the Colorado River that controls water flow and generates hydroelectric power.
How big is it?
221.4 m tall
Also 726.4 ft
Height · rounded landmark reference
A little perspective
Hoover Dam vs Gateway Arch: height comparison
Hoover Dam is about 1.15 times as tall as the Gateway Arch.
Hoover Dam is a concrete barrier on the Colorado River that controls water flow and generates hydroelectric power.
The Gateway Arch is a stainless steel monument in St Louis, Missouri, commemorating the westward expansion of the United States.
Both rulers start at the same zero and share one linear scale. Artwork keeps its original proportions. Horizontal rulers compare the selected spans; vertical brackets also identify height on the artwork.
Measurements, assumptions & sources +
Hoover Dam
Height: 221.4 m; rounded landmark reference.
A rounded 221.4 m structural-height anchor; water level changes.
Defined examples — our methodology
The marked height is calibrated. Unmeasured illustration details are representative.
Gateway Arch
Overall height: 192 m; specified; range 191 m–193 m.
The Gateway Arch rises approximately 192 m (630 ft) from ground to apex. Its width is also about 630 ft, but this entity defaults to height.
US National Park Service — Gateway Arch facts
The marked overall height is calibrated. Unmeasured illustration details are representative.
Use the visual comparison to explore its scale, then check the measurements and sources.
Change your perspective
Put it next to…
Choose a suggestion to redraw the comparison, or open its page to learn what it is.
Why this measurement?
Why we use 221.4 m
We compare the height of Hoover Dam. This is a rounded comparison value; check the notes for its source and scope.
A rounded 221.4 m structural-height anchor; water level changes.
The marked vertical span follows the measured feature, not the edges of the image. How calibrated comparisons work →
Recorded properties
Dimensions and measurements
| Property | Selected value | Recorded range | Basis |
|---|---|---|---|
| 221.4 m | Not recorded | rounded landmark reference |
Around this scale
Explore nearby values.
Compare examples with lower, similar and higher values. Each card names the measurement being compared.
Nearest lower valueBuildings and structuresGateway Arch192 mOverall heightThe Gateway Arch is a stainless steel monument in St Louis, Missouri, commemorating the westward expansion of the United States.
Around the same scaleBuildings and structuresEiffel Tower330 mHeightThe Eiffel Tower is a wrought-iron lattice structure in Paris, France, and a famous global landmark.
Nearest higher valueBuildings and structuresGolden Gate Bridge tower227 mHeightThe Golden Gate Bridge tower is one of the two main vertical supports for the suspension bridge in San Francisco.Sources and method
Want to check the number?
The source records and measurement method remain available for inspection.
More ways to see it
Curated comparisons
There’s always another scale
Follow your curiosity.
Built worldBurj Khalifa828 mBurj Khalifa is a skyscraper in Dubai, United Arab Emirates, completed in 2010.Built worldEiffel Tower330 mThe Eiffel Tower is a wrought-iron lattice structure in Paris, France, and a famous global landmark.
PeopleHuman1.75 mA human is a primate of the species Homo sapiens, distinguished by habitual upright walking, language and complex tool use.Built worldGateway Arch192 mThe Gateway Arch is a stainless steel monument in St Louis, Missouri, commemorating the westward expansion of the United States.
TransportHigh-speed train200 mA high-speed train is a passenger train designed to travel much faster than conventional rail services, often between major cities.
SportFootball pitch105 mA football pitch is the marked rectangular playing surface used for association football.
Places10 hectare park100,000 m²A park is a green space set aside for public recreation and relaxation.Built worldGolden Gate Bridge tower227 mThe Golden Gate Bridge tower is one of the two main vertical supports for the suspension bridge in San Francisco.