Helium Balloons Calculator

Your details

The weight of the object or person you want to lift.
kg
Higher altitude means thinner air, so each balloon lifts slightly less.
Balloon diameter inflated. Larger balloons lift more but use more helium.
Enter what you pay for the tank or helium fill to see a per-balloon cost.
USD
Balloons needed
6,125balloons

Minimum number of balloons to achieve lift (with a small safety margin)

Lift per balloon12g
Total lift (all balloons)73,500g
Total helium needed158,025L
Tanks required374.5tanks
Balloons needed6,125
Balloons from tank-

It takes 6,125 11-inch balloons to lift 70 kg.

  • You need 6,125 standard 11-inch balloons to lift 70 kg.
  • That requires about 158025 litres of helium in total.
  • You would need roughly 374.5 medium party tank (14.9 cu ft) tanks.
  • In practice, tether all balloons securely and add a few extra as a buffer - real balloon lift varies with temperature and fill pressure.

Next stepWant to know the helium cost? Enter your tank rental price in the "Tank cost" field above.

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