Everyday Life Calculators

Helium Balloons Lift Calculator

Calculate how many helium-filled balloons of a given size are needed to lift a target weight.

Net lift per balloon —

Balloons needed —

About the Helium Balloons Lift Calculator

Helium is lighter than air by roughly 1.07 grams per liter, which produces the lift force in a balloon. Subtracting the weight of the balloon's own rubber gives the usable net lift.

Formula: Balloon Volume (L) = (4/3) × π × Radius³ × 1000; Net Lift (g) = Volume (L) × 1.07 − Balloon Weight (g); Balloons Needed = Weight to Lift (g) ÷ Net Lift per Balloon

This is a simplified estimate that ignores string weight and altitude effects — great for party planning, not for lifting anything you actually need to come back down.