Helium Balloons Calculator

How Many Helium Balloons Do You Need to Lift a Weight?

Whether you are planning a whimsical party decoration, trying a science experiment, or simply curious about balloon buoyancy, this Helium Balloons Calculator helps you calculate the lifting power of helium. By entering the weight of your target object and selecting your balloon size, you can instantly determine the exact count of balloons required to lift it.

The calculations are based on Archimedes' buoyancy principle. Since helium is lighter than air, the buoyant force lifts the balloon. At sea level and standard temperature, one liter of helium can lift approximately 1 gram of weight (after subtracting the weight of the latex balloon itself).

Standard Balloon Sizes and Lift Capacity

Here is a breakdown of the typical lift capacity of standard round latex balloons filled with helium:

• 9-inch (23 cm) Balloon: ~6.2 liters volume, lifts ~6.6 grams.
• 11-inch (28 cm) Balloon: ~11.4 liters volume, lifts ~12.2 grams.
• 12-inch (30 cm) Balloon: ~14.8 liters volume, lifts ~15.9 grams.
• 18-inch (46 cm) Balloon: ~50.1 liters volume, lifts ~53.7 grams.
• 24-inch (61 cm) Balloon: ~118.8 liters volume, lifts ~127.3 grams.
• 36-inch (91 cm) Balloon: ~400.9 liters volume, lifts ~429.6 grams.