Balloon Arch Calculator: How Many Balloons for an Arch

Your details

The tallest point of the arch from the floor.
ft
The horizontal span of the arch, measured at ground level.
ft
Garland styles use repeating clusters; string of pearls is a single line; organic arches mix sizes and are fuller.
Inflated diameter of each balloon. Most latex party balloons inflate to 11 inches.
Used only to estimate cost. Standard latex balloons are the most common choice.
Buy a few extra in case balloons pop during inflation. 10% is the standard recommendation.
Balloons neededLarge event arch
105balloons

Total count including your chosen buffer

Base count (no buffer)95balloons
Arch line length18
Estimated cost$10.50
Base count95
With buffer105

You need about 105 balloons for your 4-balloon cluster garland.

  • Your 4-balloon cluster garland needs about 18.0 ft of balloon line.
  • The base count is 95 balloons; the 10-balloon buffer covers pops and inflation waste.
  • At your chosen balloon type, the estimated cost is $10.50.

Next stepBuy your balloons a day before the event. Inflate latex balloons no more than 12-24 hours ahead so they hold their shape.

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