Architectural top vs honest height
Willis Tower is marketed at 442.1m. The highest floor a person can stand on - the highest occupied floor - is at 412.4m. The gap between those two numbers is 29.7m of structure that no occupant reaches.
That gap is the vanity height. As a percentage of architectural top, it is the Vanity Ratio: 6.7%.
In the Honest 100,Willis Tower ranks #21 by occupied height.
Observation decks
Skydeck Chicago
Floor 103 · Indoor
412m
Ticket booking links coming soon. Check back after affiliate program approval.
Vanity context
A Vanity Ratio of 6.7% places Willis Tower within the moderate range. The non-occupiable structure above the highest occupied floor is significant but not unusual for a building of this height.
Comparable buildings
Similar Vanity Ratio
In context
Sources and methodology
Height data sourced from Wikipedia (CC-BY-SA). Vanity Ratio calculated as (Architectural Top - Highest Occupied Floor) / Architectural Top. See the full methodology.
Per-field source notes
- architectural_top_m
- Wikipedia - 442.1m to top of twin antennae
- roof_height_m
- Wikipedia - 412.4m to roof
- highest_occupied_floor_m
- Wikipedia - Skydeck at 103F / 412m
- observation_decks
- Official theskydeck.com - 103F at 412m
- hat_factor_pct
- Calculated: (442.1-412.4)/442.1 = 6.7%