
It's about onetwohundredth as heavy as The Space Shuttle.
In other words, 404 kilograms is 0.0057 times the weight of The Space Shuttle, and the weight of The Space Shuttle is 180 times that amount.
(for Endeavour, a.k.a. OV105, a.k.a. Orbiter Vehicle105) (empty weight, excluding main engines)
It's about 200 times as heavy as a Chihuahua.
In other words, 404 kilograms is 180 times the weight of a Chihuahua, and the weight of a Chihuahua is 0.00556 times that amount.
(a.k.a. Chihuahue(o) (FCI standard)
It's about onetwohundredfiftieth as heavy as a Blue Whale.
In other words, 404 kilograms is 0.003866 times the weight of a Blue Whale, and the weight of a Blue Whale is 258.7 times that amount.
(Balaenoptera musculus)
It's about 300 times as heavy as a Human Brain.
In other words, 404 kilograms is 299 times the weight of a Human Brain, and the weight of a Human Brain is 0.00334 times that amount.
(adult)
It's about onefourhundredth as heavy as a House.
In other words, 404 kilograms is 0.00259 times the weight of a House, and the weight of a House is 386 times that amount.
(149 sq. m, singlelevel, unfurnished)
It's about 400 times as heavy as a liter of Water.
In other words, 404 kilograms is 403.9887 times the weight of a liter of Water, and the weight of a liter of Water is 0.002475317 times that amount.
(fresh; 4° C / 39.2° F; maximum density)
It's about 650 times as heavy as a Basketball.
In other words, 404 kilograms is 647.75821035 times the weight of a Basketball, and the weight of a Basketball is 0.0015437859127 times that amount.
(NBA official ball standards, Size 7) 
