Sydney Harbour Bridge
Sydney Harbour Bridge is a steel arch bridge in Sydney, Australia, connecting the city centre with the North Shore.
Also known as: Sydney Harbour steel arch
How big is it?
503 m · main arch span
Also 1,650 ft
Main arch span · specified
Typical recorded range: 502 m to 504 m.
A little perspective
Sydney Harbour Bridge vs Bennu asteroid: length comparison
The main arch span of Sydney Harbour Bridge is about 1.02 times the equatorial diameter of the asteroid Bennu.
Sydney Harbour Bridge is a steel arch bridge in Sydney, Australia, connecting the city centre with the North Shore.
Bennu is a near-Earth asteroid with a rubble-pile structure and a roughly top-shaped body.
Both rulers start at the same zero and share one linear scale. Artwork keeps its original proportions.
Measurements, assumptions & sources +
Sydney Harbour Bridge
Main arch span: 503 m; specified; range 502 m–504 m.
The selected measurement is the approximately 503 m main steel arch span, not total approach length.
Transport for NSW — Sydney Harbour Bridge
The marked main arch span is calibrated. Unmeasured illustration details are representative.
Bennu asteroid
Representative equatorial diameter: 492 m; approximate; range 480 m–510 m.
Near-Earth asteroid Bennu is about 500 m across and has a rubble-pile, top-shaped body. The 492 m and 7.3 × 10¹⁰ kg values are rounded comparison anchors.
The marked representative equatorial diameter is calibrated. Unmeasured illustration details are representative.
Use the visual comparison to explore its scale, then check the measurements and sources.
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Why this measurement?
Why we use 503 m
We compare the main arch span of Sydney Harbour Bridge. This value follows a stated specification; check its scope in the notes. The recorded range is 502 m to 504 m.
The selected measurement is the approximately 503 m main steel arch span, not total approach length.
The marked horizontal 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 |
|---|---|---|---|
| 503 m | 502 m to 504 m | specified |
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 structuresBrooklyn Bridge486.3 mMain span between tower centresThe Brooklyn Bridge is a suspension bridge spanning the East River between Manhattan and Brooklyn in New York City.
Around the same scalePlaces and natural featuresPowell River500 mApproximate main-channel lengthThe Powell River is a short river in British Columbia flowing from Powell Lake to the Salish Sea.
Nearest higher valueBuildings and structuresCN Tower553.3 mHeightThe CN Tower is a telecommunications and observation tower in Toronto, Canada.Sources and method
Want to check the number?
The source records and measurement method remain available for inspection.
- Transport for NSW — Sydney Harbour BridgeMain steel arch span approximately 503 m.
There’s always another scale
Follow your curiosity.
Built worldTower Bridge61 mTower Bridge is a combined bascule and suspension bridge crossing the River Thames in central London.
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.
SpaceBennu asteroid492 mBennu is a near-Earth asteroid with a rubble-pile structure and a roughly top-shaped body.Built worldBrooklyn Bridge486.3 mThe Brooklyn Bridge is a suspension bridge spanning the East River between Manhattan and Brooklyn in New York City.Sport400 m running lap400 mA 400 m running lap is the standard distance for one circuit of an athletics track, measured along the inside lane.
TransportContainer ship400 mA container ship is a large vessel built to transport standardised cargo containers across seas and oceans.Built worldCN Tower553.3 mThe CN Tower is a telecommunications and observation tower in Toronto, Canada.
Built worldEmpire State Building443.2 mThe Empire State Building is a skyscraper in New York City, completed in 1931 and noted for its Art Deco architecture.