Energy · United States
$5.9 billion
BudgetGuessr project library
What the world’s biggest projects really cost
Compare published costs, timelines, project scale and original sources behind remarkable infrastructure and space missions.
Verified project costs
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1733 projects
Airport · United States
$1.7 billion
Pittsburgh International Airport
2025Space mission · United States
$996.4 million
Psyche
2020Bridge · United Kingdom
£4.9 million
Queen Elizabeth II Metro Bridge
1978Approximately $9.4 million
Stadium · United States
$137 million
Rate Field
1991Railway · Japan
¥442.6 billion
Rinkai Line
2002Approximately $3.53 billion
Airport · United States
$2.4 billion
San Francisco International Airport Redevelopment
2020Energy · United States
$4.5 billion
San Onofre Nuclear Generating Station
1984Railway · People's Republic of China
$1.2 billion
Shanghai maglev train
2004Railway · United States
$10.079 billion
Skyline
2026Space mission · United States
$917 million
Soil Moisture Active Passive
2012Skyscraper · Taiwan
$1.8 billion
Taipei 101
2004Skyscraper · United Kingdom
£500 million
The Scalpel
2018Approximately $667.08 million
Space mission · United States
$378 million
Transiting Exoplanet Survey Satellite
2014Airport · United States
$39.226 million
Tri-State Airport
2014Tunnel · Germany
€220 million
Warnow Tunnel
2003Approximately $248.86 million
Skyscraper · United States
$80 million
Westgate Las Vegas Resort & Casino
1969Dam · United States
$47 million
Wilson Dam
1925Skyscraper · United States
$2.74 billion
Wynn Las Vegas
2005Bridge · Japan
¥500 billion
Akashi Kaiky? Bridge
1998Approximately $3.82 billion
Space mission · United States
$3.9 billion
Cassini–Huygens
2017Railway · Germany
€2.967 billion
Erfurt–Leipzig/Halle high-speed railway
2014Approximately $3.94 billion
Railway · Norway
NOK 36.8 billion
Follo Line
2022Approximately $3.83 billion
Space mission · United States
$828.9 million