The chart below shows the amount of helium needed and average flying time for Qualatex latex balloons:
11 inch round balloon (standard colors) - .5 cu ft - 18-24 hours
11 inch round balloon (metallic or pearl) - .5 cu ft - 16-18 hours
11 inch heart balloon - .3 cu ft - 8 hours
16 inch round balloon - 1.5 cu ft - 30+ hours
17 inch heart shaped balloon - .9 cu ft - 14 hours
3 foot round balloon - 15 cu ft - 3 - 5 days
3 foot heart shapped balloon - 7 cu ft - 3 - 5 days
18" Foil (mylar balloon) - .5 cu ft - 1 - 2 weeks
36" Foil (mylar balloon) - 4.4 cu ft - 2 - 3 weeks
Note: Actual flying times vary depending on temperature and atmospheric conditions. Times listed are conservative averages.
*Using ULTRA HI-FLOAT balloon flight extender for all helium-filled latex balloons can increase the flying times of latex balloons up to 25 times longer than untreated balloons (hi-float should not be used in foil/mylar balloons).
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