According to slate.com, it will take 9.4 million party balloons to lift Carl's house in the Pixar movie Up. On the other hand, Pete Docter of Pixar estimated Carl's house to be 1,800-square feet and needing 23.5 million party balloons to achieve liftoff fro real.

In actuality, Pixar animators estmate the use of over 20,000 animated balloons used for the lift. Over 10,000 balloons were used in other scenes of the Pixar smash hit Up.