Helium balloons Flying Time explained
The basic formula to work out the helium balloons flying time the following:
HELIUM has a lift of .84 ounces per cubic foot at sea level. To determine the volume of a balloon in cubic feet, multiply the cube of the radius in inches by 1.333, multiply the result by 3.1416, and then divide by 1728.
To determine the lift of a helium filled balloon, multiply the volume in cubic feet by .84 to determine ounces, Divide ounces by 16 to determine pounds.
Lift is reduced approximately 7.5% for each 1000 feet above sea-level.
HELIUM has a lift of .84 ounces per cubic foot at sea level. To determine the volume of a balloon in cubic feet, multiply the cube of the radius in inches by 1.333, multiply the result by 3.1416, and then divide by 1728.
To determine the lift of a helium filled balloon, multiply the volume in cubic feet by .84 to determine ounces, Divide ounces by 16 to determine pounds.
Lift is reduced approximately 7.5% for each 1000 feet above sea-level.
The information contained in this chart is computed at sea-level and is approximate.
Volume may vary due to over-inflation or under-inflation of the balloon.
Lift, and flying time are effected by such things as helium quality, weather, humidity, temperature, atmospheric conditions, and elevation above sea-level. As a "rule of thumb", reduce lift and flying time by 7.5% for each 1000 feet above sea-level.
Volume may vary due to over-inflation or under-inflation of the balloon.
Lift, and flying time are effected by such things as helium quality, weather, humidity, temperature, atmospheric conditions, and elevation above sea-level. As a "rule of thumb", reduce lift and flying time by 7.5% for each 1000 feet above sea-level.
| Round Latex Balloons | |||
|---|---|---|---|
Balloon Size |
Approximate Volume |
Approximate Lift |
Approximate Flying Time |
| 7 inches | .104 cu. ft. |
.087 ounce |
3 to 5 hours |
| 8 inches | .155 cu.ft. |
.130 ounce |
4 to 6 hours |
| 9 inches | .221 cu. ft. |
.186 ounce |
8 to 14 hours |
| 10 inches | .303 cu. ft. |
.254 ounce |
16 to 18 hours |
| 11 inches | .403 cu. ft. |
.339 ounce |
18 to 24 hours |
| 12 inches | .523 cu. ft. |
.440 ounce |
22 to 28 hours |
| 13 inches | .666 cu. ft. |
.559 ounce |
24 to 30 hours |
| 14 inches | .831 cu. ft. |
.698 ounce |
26 to 34 hours |
| 15 inches | 1.022 cu. ft. |
.859 ounce |
30 to 42 hours |
| 16 inches | 1.241 cu. ft. |
1.042 ounces |
36 to 48 hours |
| 18 inches | 1.767 cu. ft. |
1.484 ounces |
42 to 54 hours |
| 24 inches | 4.188 cu. ft. |
3.518 ounces |
2 to 3 days |
| 30 inches | 8.179 cu. ft. |
6.871 ounces |
3 to 4 days |
| 36 inches | 14.134 cu. ft. |
11.872 ounces |
4 to 5 days |
| Heart Shaped Balloons | |||
|---|---|---|---|
Balloon Size |
Approximate Volume |
Approximate Lift |
Approximate Flying Time |
| 11 inch | .35 cu. ft. |
.294 ounce |
8 to 10 hours |
| 17 inch | 1.00 cu. ft. |
.840 ounce |
18 to 24 hours |
| 36 inch | 15.66 cu. ft. |
13.155 ounces |
3 to 4 days |
| Geo® Heart | .35 cu. ft. |
.294 ounce |
8 to 10 hours |