Balloon Calculator
How It Works
Balloon decorations can transform any event space, but estimating the right quantity is tricky. This calculator uses the area you want to cover, the balloon size, and your desired density to give an accurate count. Common balloon sizes are 9-inch for table arrangements, 11-inch for general decorations, and 14-17 inch for statement pieces.
The coverage density setting lets you choose between a sparse arrangement (accent pieces), medium coverage (a good balance), and dense coverage (balloon walls or full ceiling coverage). Dense coverage uses about twice as many balloons as sparse.
Always purchase 10% extra balloons to account for popping during inflation and setup. For outdoor events, increase this buffer to 15-20% since temperature changes and wind can cause more failures. Helium-filled balloons typically last 8-12 hours, while air-filled balloons last several days.
Frequently Asked Questions
How many balloons do I need for a balloon arch?
A standard balloon arch (8-10 feet tall, 6-8 feet wide) typically requires 80-120 balloons using 11-inch balloons. A full-frame arch may need 150-200. Use a mix of sizes for a more organic look.
How long do helium balloons last?
Standard latex helium balloons last 8-12 hours. Hi-float treated balloons can last 24-48 hours. Foil/mylar balloons last 3-5 days or longer. For outdoor events, expect shorter durations due to heat and wind.
What size balloons should I use?
Use 11-inch balloons for most decorations — they are the most versatile. Use 5-inch for garlands and clusters, 9-inch for table centerpieces, and 14-17 inch for focal points. Mix sizes for visual interest.
How do I calculate balloons for a balloon wall?
For a balloon wall, measure the wall area in square feet and use the dense coverage setting. A typical 8x10 foot wall needs 200-300 balloons of mixed sizes (5-inch and 11-inch).