🪙The Gateway Arch is about 110,000 quarter-thicknesses tall.

The National Park Service gives the Gateway Arch a maximum height of 630 ft. The U.S. Mint specifies a quarter at 1.75 mm thick — the same quarter reference used for six feet. Convert the height to millimetres and divide.

The National Park Service lists 630 ft for both the Arch's maximum height and its outer width at ground level, from the outside of the north leg to the outside of the south leg. So the same ≈110,000 quarter-thicknesses would also span its base — as a dimensional comparison, not an actual line of coins.

Maximum height

630 ft (192 m)

Outer width at ground level

630 ft (192 m)

Gateway Arch height

630 ftSource value

Maximum height

In inches

630 × 12 = 7,560 inCalculated

In millimetres

7,560 × 25.4 = 192,024 mmCalculated

Quarter thickness

1.75 mmSource value

U.S. Mint specification

Quarter-thicknesses

192,024 ÷ 1.75 = 109,728Calculated

Published

≈110,000 quarter-thicknessesResult

Rounded — the comparison doesn't justify more digits

Derived comparison · standardized references. The National Park Service gives the 630 ft height and the U.S. Mint specifies the 1.75 mm quarter. The division is Scaleidoscope's, rounded to about 110,000 because the comparison doesn't justify more digits.

Stacked flat, using the specified 1.75 mm coin thickness.

• US National Park Service

  Gateway Arch National Park — arch facts and construction history(opens external site)

• National Park Service

  Gateway Arch Fact Sheet(opens external site) — General Facts

  Maximum height = 630 ft

• National Park Service

  Gateway Arch Fact Sheet(opens external site) — General Facts

  Maximum height 630 ft and outer width (outside north leg to outside south leg) 630 ft

• United States Mint

  Coin Specifications(opens external site) — Quarter

  Quarter thickness = 1.75 mm

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