How Much Helium Do I Need?

 

Cubic Feet Per Balloon

BALLOONS Latex Mylar
Size: 9" 10" 11" 12" 14" 16" 20" 36" 18" 26"
Volume (ft3): .27 .30 .50 .52 1.00 1.25 2.42 4.14 .44 1.5

Formula: Volume in cubic feet = 4/3 pi r3
1728 

Balloons per Cylinder

BALLOONS Latex Mylar
Cylinder 9" 10" 11" 12" 14" 16" 20" 36" 18" 26"
22 ft3 81 73 44 42 22 17 9 5 50 14
58 ft3 214 193 116 111 58 46 23 14 131 38
110 ft3 407 366 220 211 110 88 45 26 250 73
137 ft3 507 456 274 263 137 109 56 33 311 91
219 ft3 811 730 438 421 219 175 90 52 497 146
286 ft3 1059 953 572 550 286 228 118 69 650 190

Helium High Pressure Cylinders
*Denotes light-weight aluminum cylinder

PART
NUMBER

CYL.
SIZE

WEIGHT
OF GAS (LBS.)

APPROX.
WT. OF FULL
CYLINDER (LBS.)

PRESSURE
(PSI @ 70F)

GALLONS

LITERS

DIMENSIONS
(Height x Diameter)

HELE*

22 ft3

.225

9

1800

165

623

30" x 4-1/2"

HEL058*

58 ft3

.59972

22

1800

436

1642

27" x 8"

HEL110

110 ft3

1.1374

58

2265

823

3115

47" x 7"

HEL110*

110 ft3

1.1374

44

2265

823

3115

41" x 8"

HEL137*

137 ft3

1.41658

42

2265

1030

3880

47" x  8"

HEL219

219 ft3

2.26446

135

2265

1638

6202

51" x 9"

HEL286

286 ft3

2.95724

160

2200

2150

8099

55" x 9-1/4"

 

DOT Information
DOT Name:  Helium
DOT Hazard Class:  Nonflammable Gas
DOT Label:  Nonflammable Gas
DOT ID No.:  UN1046
CAS No.:  7440-59-7
Valve Outlet:  CGA 580

Physical State in High Pressure Cylinder:   Gas
Major Hazards:  High Pressure Suffocation
Fire Potential:  Non-Flammable

Physical Properties of Helium
Formula: He
Molecular Weight:   4.003 lb/mol
Specific Volume at 70°F and 1 atm: 96.71 ft3/lb (6.00 m3/kg)
Specific Heat:  4.97 BTU/lbmol-deg F@ 70 deg. F
Specific Gravity:  .138
Gas Density:    .010346 lb/ ft3 @ 70 deg. F. 14.7 PSIA
Boiling Point:   Temperature:   -452.1 deg. F (-268.9 deg. C)
                                 Liquid Density:   7.804 lb./ft3
                                Latent Heat:   8.778BTU/lb.
Critical Point:  Temperature:  -450.3 deg. F
                                Pressure:    33.2 PSIA
Melting Point:  Temperature:   455.8 deg. F
                                Pressure:    .0735 PSIA