Fun Unit Converters
Pick two units and convert instantly — or browse by unit system below.
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Classic Novelty
Smoots
Bananas
Football Fields
American Football Fields
London Double-Decker Buses
Eiffel Towers
Mount Everests
Olympic Pools
Empire State Buildings
Giraffes
School Buses
Blue Whales
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Pop Culture
Lightsabers
Death Stars
TARDISes (exterior)
Hogwarts Great Halls
Sharks
Millennium Falcons
Minivans
iPhones
Emperor Penguins
About fun unit conversions
Fun units are informal measurements used to make large or abstract distances more relatable. From the smoot (invented at MIT in 1958) to bananas (used in science communication), these quirky units help put scale into perspective.
The smoot is perhaps the most famous novelty unit — Oliver Smoot was laid end-to-end 364.4 times to measure the Harvard Bridge in Cambridge, Massachusetts. Google Earth and Google Maps even supported smoot measurements for a time.
Pop culture has added its own units: lightsabers, the Millennium Falcon, and the Death Star all have official documented dimensions from Lucasfilm and can be used as genuine length references.
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