How much helium do I need for my balloons?

The amount of helium needed depends on balloon size, type (latex or foil), and quantity. Standard 9-inch latex balloons need 0.25 cubic feet each, 11-inch need 0.5 cubic feet. Use our calculator for exact requirements with a 5% safety margin included.

What size helium tank do I need to fill 100 balloons?

For 100 standard 9-inch latex balloons, you need approximately 25 cubic feet (0.71 m³) of helium. Best options: 3 × Large Disposable cylinders (0.33 m³ each) or 1 × 20L refillable cylinder (4 m³).

What's the cost of helium per balloon?

Cost per balloon varies by cylinder size. Small disposables cost about £1 per balloon, while large refillables reduce this to £0.50-0.80 per balloon. Larger cylinders offer better value due to improved gas capacity utilization.

How long do helium balloons float?

Latex balloons float 8-12 hours, foil balloons last days or weeks. Use Hi-Float treatment to extend latex float time to 24-48 hours. Always inflate close to event time for best results.

How accurate is the helium calculator?

Our calculator provides industry-standard accuracy with a 5% safety margin for wastage. Calculations are based on manufacturer specifications and real-world testing.

Can I calculate helium for both latex and foil balloons?

Yes! Add multiple balloon sets with different types and sizes. The calculator sums total helium requirements and recommends appropriate cylinders for combined needs.

What's the difference between disposable and refillable cylinders?

Disposable cylinders (0.14-0.33 m³) require no deposit and suit one-time events. Refillable cylinders (0.42-10 m³) require a refundable deposit but offer better value for regular use with lower per-balloon costs.

Helium4U Calculator

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Helium4U Calculator - Free UK Helium Balloon Gas Calculator & Delivery