Balloon Garland & Arch Calculator
Work out how many balloons a garland or arch needs — 5-inch, 11-inch and 16-inch counts per foot for classic, organic and double-stuffed styles, the strip or fishing-line length, inflation time with a pump, packs to buy, weight for hanging, and cost — for parties, weddings and backdrops.
How it works
balloons per foot: classic ≈ 7 × 11″ + 2 × 5″; organic ≈ 5 × 11″ + 5 × 5″ + 1 × 16″; demi adds 0.3 × 24″; mini ≈ 3 × 11″ + 6 × 5″ · spares 10% · double-stuff adds one inner balloon per stuffed balloon · strip = length × 1.15
A garland is a chain of balloons packed around a strip or line, and its appetite is set by how densely and at what sizes they are packed: an 11-inch balloon inflated to about 10 inches fills roughly a fifth of a foot along the spine in a classic tight garland, while the organic style that dominates modern parties mixes big and small balloons in clusters so that fives fill the gaps and the occasional sixteen breaks the rhythm. Counting per foot for each size and scaling to the length gives the shopping list; spares cover pops, and double-stuffing — one balloon inside another for muted colours — doubles the count for those balloons. Everything is air-filled, so weight is trivial and the anchors are about geometry, not load.
Worked example
A 10 ft organic garland needs about 50 × 11″, 50 × 5″ and 10 × 16″ — 110 balloons, 11 per foot — plus 11 spares: one 100-pack of each latex size plus ten 16″, 11.5 ft of decorating strip, roughly $36 in materials. One person with an electric pump inflates and assembles it in about 1.5 hours; it weighs under 1 lb and hangs on three or four command hooks.
Frequently asked questions
Helium or air?
Air — garlands are mounted, not floated. Air-filled latex holds for days, costs nothing to fill and does not need weights. Helium is only for balloons that must float free.
How far ahead can I make it?
One to two days indoors at room temperature. Latex oxidises (goes matt) after a day and shrinks in heat or sun; add the 16″ and any foil accents last, on the day.
Related calculators
Craft estimates from common studio practice and supplier guidance. Materials vary by brand and technique — round up, keep offcuts, and test on a sample before committing a whole project.