The best replacement for floats is doubles.

The best alternatives to floats are rated as following:
★★★★★  doubles
★★  absolute positioning
★★  sinks
★★  sinks density
★★  bakes
★  sinks in water
★  bobbers
★  rafts
  feces sinks
  ints
  stool that sinks
  flies
  stool sinks

Your alternative for floats is not listed? Suggest!
Speaking about floats, one probably shouldn't forget about overflow hidden.

Other search terms related to floats and their ratings are:
★★★★★ overflow hidden
You have in mind a companion for floats and it is not yet here? Propose!



Google Trends

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floats
doubles
absolute positioning