Balloon Arch & Garland Calculator
Plan event decor quickly. Enter your structure dimensions to calculate balloon counts, color breakdowns, and accessory lengths.
Total balloons
126
Structure length ~23.8 ft
Balloons per color
Color 1: 32 • Color 2: 32 • Color 3: 31 • Color 4: 31
Supplies
Balloon tape: 23.8 ft
Ribbon: 31.5 ft
Alternate colors within each cluster for a classic pattern or group colors for an ombre effect.
How to Use This Calculator
Measure the installation area
Measure arch width between bases and desired peak height, or total garland length along the backdrop.
Select balloon size and cluster style
Standard latex balloons are 11 inches. Increase cluster size for fuller designs or mix sizes for organic garlands.
Review balloon counts and supply lengths
Use the totals to order balloon packs, tape, and ribbon, leaving room for pops and design tweaks.
Formula
Balloons = Structure length × 4.8 × (11 ÷ Balloon size) × (Cluster size ÷ 4)
Total with spares = Balloons × (1 + Extra% ÷ 100)
Example: 12 ft arch with 11" balloons and clusters of 4 → 12 × 4.8 × 1 × 1 = 57.6, plus 10% spares ≈ 64 balloons.
Full Description
Precise balloon counts help decorators and DIY hosts avoid last-minute shortages. This calculator adapts to arches, garlands, or columns and suggests accessory lengths based on your structure dimensions.
Adjust cluster size, balloon size, and color count to suit organic garlands or classic symmetric designs, then bring the totals with you when purchasing supplies.
Use the notes to fine-tune spacing, add spares for pops, and plan finishing touches like florals or miniature balloons.
Frequently Asked Questions
How many balloons do I need per foot?
For 11 inch balloons with clusters of four, plan on roughly 4.8 balloons per foot. Adjust for different balloon sizes or cluster styles.
Can I mix balloon sizes?
Yes. Calculate using your main size, then add 10–20% smaller balloons for organic accents.
How long will a balloon arch last?
Indoor arches can last two to three days. Outdoor installations deflate faster due to sun and heat, so inflate on the event day.
Do I need helium?
Most arches, garlands, and columns use air-filled balloons secured to tape, fishing line, or frames. Helium is only needed for floating arrangements.