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Balloon Data
How many Balloons Per Helium Cylinder?

For special events, it is a good idea to have an estimate of how many balloons you want so that you can then determine the size helium cylinder that you will need.

 

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Do not overfill balloons!  Balloons are sold according to their optimum size and overfilling the balloon will not enable the balloon to remain inflated in excess of its rated time.  Causing a balloon rated for 9" to become inflated to 11" could cause you to use twice as much helium gas!  
Consult your chart and your local rental professional to match your balloon size with your helium requirements.  The following chart gives an estimate of the number of balloons that can beobtained from different sized helium cylinders.  Allow for escaped gas when determining the size cylinder(s) needed for your activity. These are NOT retail store quality balloons, these are high-grade, commercial quality latex rubber, specifically made for Helium. The material used for these balloons is Tuf-Tex® Latex.
How many balloons can you expect to obtain per cylinder size?
Balloon Size Helium Required per Balloon 40 cu.ft.

120 cu.ft.
20 lb cylinder

$39.50 rental

242 cu.ft.
50 lb cylinder

$68.50 rental

 Fly Time Average
8"
.20 cu.ft.
200
618
1236
4 to 8 hours
9"
.27 cu.ft.
180
370
895
8 to 14 hours
11"
.50 cu.ft.
100
240
484
16 to 24 hours
16"
1.25 CF
40
98
196
28 to 32 hours
17"
1.5 CF
160
32 to 55 hours
20"
2.42 CF
95
2 to 3 days
36"
10 CF
24
3 to 5 days
66"
87 CF
2.75
5 to 7 days
Inflating Tips
When inflating balloons for outdoor use, remember that the air or gas inside the balloon will expandthe warmer it becomes. When temperatures exceed 75 degrees, try not inflating the balloon at 100%. Try 85-90% inflation. This will leave more room for expansion and result in less breakage.
When using a product such as "Hi-Float!" for extending the helium life of a latex balloon, try inflatingthe balloon first with air. After letting the air out, spread the Hi-Float! over the inside surface of the semi-expanded balloon. The coverage will be more consistant using the larger surface.