How Many Balloons Can a 14.9 Cubic Foot Helium Tank Fill?

A 14.9 cubic foot helium tank is sufficient to fill 50 nine-inch latex balloons. However, if you want to fill more than 50 balloons, you should rent a larger tank. Depending on your requirements, a larger tank can hold as many as 500 balloons. A helium tank rental usually costs $100 to $200 and will come with a valve, nozzle, and pressure gauge.

A 20-cubic-foot helium tank can fill tons of balloons and is less expensive than pre-filled cylinders. It can also be refilled at local gas stations for a smaller price, making it a better value than buying a new tank every time you need to fill up balloons.

Depending on the type and size of your balloons, a 14.9-cubic-foot helium tank can fill between one and four dozen balloons. The chart below breaks down each type of balloon by volume. For example, a 9-inch latex balloon will require 25 cubic feet of helium while a 14-inch foil/mylar balloon will require 30 cubic feet of helium.

A standard 14.9-cubic-foot helium tank can fill up to fifty nine-inch latex balloons and approximately twenty-seven eleven and eighteen-inch balloons. Latex balloons can float for about five to seven hours, while foil and mylar balloons can float for up to four days. The floating time will depend on the type of balloon and its height.