Free Tool
How Long Will Balloons Stay Up? Balloon Float Time Calculator
Published · Updated
In short
- An untreated 11" latex balloon filled with helium is published at 18–24 hours indoors; treated with Ultra Hi-Float the same balloon is published at 1–4 weeks.
- A helium-filled foil balloon is published at "at least 3–5 days", and a 22" Qualatex Bubble at approximately 2–4 weeks — both hold overnight without difficulty.
- Balloons typically float for half as long in hot, humid weather, and no manufacturer publishes an outdoor figure at all — so outdoor installations are scheduled for the morning of the event.
How long will the balloons stay up?
A helium-filled 11" latex balloon is published at 18–24 hours indoors; the same balloon treated with Ultra Hi-Float is published at 1–4 weeks. Foil balloons are published at "at least 3–5 days" and Qualatex Bubble balloons at approximately 2–4 weeks.
Those four numbers cover most corporate décor. The material decides the answer far more than anything else does, which is why the first question on a brief is what the installation is made of rather than how big it is.
Every published figure assumes an indoor, climate-controlled room. Outdoors, and in hot or humid conditions, the window shortens — by half in hot, humid weather according to the HI-FLOAT Company, and by an unpublished amount outdoors.
What does a float-extending sealant actually do?
A sealant coats the inside of a latex balloon so helium escapes through the wall more slowly. The HI-FLOAT Company publishes 1–4 weeks for a treated 11" latex balloon against 18–24 hours untreated, and Qualatex states the treatment can increase latex flying times up to 25 times.
Definition
Ultra Hi-Float is a clear, water-soluble coating applied to the inside of a latex balloon before it is inflated. It dries into a thin barrier that slows helium loss through the porous latex wall. It is a latex treatment only — it does nothing for foil or Bubble balloons, which are already made of far less porous material.
The trade-off is timing. The HI-FLOAT Company states a treated balloon needs a few hours after inflation for the coating to dry, which is one of the reasons treated décor is prepared ahead rather than on arrival.
Which balloon holds longest — latex, foil or Bubble?
Bubble balloons hold longest of the common event materials: a 22" Qualatex Bubble is published at approximately 2–4 weeks and a 24" Deco Bubble at 3–5 weeks. Foil follows at "at least 3–5 days", and untreated 11" latex is the shortest at 18–24 hours.
The table below is the full published set. Every duration in it is a manufacturer or industry figure with a source link, and every combination with no published figure says so rather than showing an invented one.
Reference table
Published Balloon Hold Windows
Balloon type × treated or untreated × indoor or outdoor. Sourced figures only — see the Sources block at the foot of the page.
| Balloon | Fill | Treatment | Indoor, climate-controlled | Outdoors | Verdict |
|---|---|---|---|---|---|
| 9" latex round | Helium | Untreated | 12–16 hours | Shorter — no published figure; ask for a site-specific answer | Install the morning of the event |
| 11" latex — standard and special colours | Helium | Untreated | 18–24 hours | Shorter — no published figure; ask for a site-specific answer | Install the morning of the event |
| 11" latex — metallic and pearl colours | Helium | Untreated | 16–18 hours | Shorter — no published figure; ask for a site-specific answer | Install the morning of the event |
| 11" latex — standard and special colours | Helium | Ultra Hi-Float | 1–4 weeks | Shorter — no published figure; ask for a site-specific answer | Safe to install the day before, or several days ahead |
| 11" latex — metallic and pearl colours | Helium | Ultra Hi-Float | 1–3 weeks | Shorter — no published figure; ask for a site-specific answer | Safe to install the day before, or several days ahead |
| 16" latex round | Helium | Untreated | 30+ hours | Shorter — no published figure; ask for a site-specific answer | Day before works in a climate-controlled room |
| 16" latex round | Helium | Ultra Hi-Float | 3–7 weeks | Shorter — no published figure; ask for a site-specific answer | Safe to install the day before, or several days ahead |
| 18" latex round | Helium | Untreated | 36+ hours | Shorter — no published figure; ask for a site-specific answer | Day before works in a climate-controlled room |
| 18" latex round | Helium | Ultra Hi-Float | 3–8 weeks | Shorter — no published figure; ask for a site-specific answer | Safe to install the day before, or several days ahead |
| 24" latex round | Helium | Untreated | 2–4 days | Shorter — no published figure; ask for a site-specific answer | Safe to install the day before |
| 24" latex round | Helium | Ultra Hi-Float | 4–10 weeks | Shorter — no published figure; ask for a site-specific answer | Safe to install the day before, or several days ahead |
| 3 ft (36") giant latex | Helium | Untreated | 3–5 days | Shorter — no published figure; ask for a site-specific answer | Safe to install the day before, or several days ahead |
| 3 ft (36") giant latex | Helium | Ultra Hi-Float | 6–20 weeks | Shorter — no published figure; ask for a site-specific answer | Safe to install the day before, or several days ahead |
| Foil / mylar (Microfoil®), properly inflated | Helium | Untreated | At least 3–5 days | Shorter — no published figure; ask for a site-specific answer | Safe to install the day before; can be topped up on site |
| 22" Bubble (stretchable plastic) | Helium | Untreated | Approximately 2–4 weeks | Shorter — no published figure; ask for a site-specific answer | Safe to install the day before, or several days ahead |
| 20" Deco Bubble | Helium | Untreated | 7–10 days | Shorter — no published figure; ask for a site-specific answer | Safe to install the day before, or several days ahead |
| 24" Deco Bubble | Helium | Untreated | 3–5 weeks | Shorter — no published figure; ask for a site-specific answer | Safe to install the day before, or several days ahead |
| 11" latex on a frame (garland, arch, column) | Air | Untreated | Loses about 20% of its air in two months | Shorter — no published figure; ask for a site-specific answer | Air-filled décor does not float — this is size retention, not float time |
| 11" latex on a frame, treated | Air | Ultra Hi-Float | Stays full size for over one month | Shorter — no published figure; ask for a site-specific answer | Air-filled décor does not float — this is size retention, not float time |
| Any balloon, outdoors or in direct sunlight | Helium | Untreated | Not applicable | Varies — ask for a site-specific answer | Install the morning of the event and confirm on site |
“Varies” and “no published figure” are real answers here. Where a manufacturer has not published a number — outdoors, in every case — this page does not invent one.
Calculator
Work Out the Window for Your Own Balloons
The control below computes any combination from the same published figures as the table. Everything it can tell you for a common case is already in that table.
The exact condition the published float-time tables assume.
Expected hold window
18–24 hours
Install the morning of the event.
Based on the published figure for 11" latex — standard and special colours.
- HI-FLOAT states these times require balloons to be kept indoors in a climate-controlled location with the heater or air conditioner running.
Source: Pioneer Balloon Company (Qualatex®).
Need a Hold Window for a Specific Venue?
Send the event date, the venue and whether the installation is indoors or outdoors. Our team will confirm what the space allows and return a décor concept with a written proposal.
Worked example
What Does This Look Like for a Real Corporate Event?
A 9 a.m. product launch in SoMa, San Francisco
An indoor launch event opens at 9 a.m. in a climate-controlled office. The décor is a helium bouquet cluster in 11" latex plus a foil accent, and the client asks whether it can go in the night before.
- 1Untreated 11" latex, helium, indoors: published at 18–24 hours (Qualatex).
- 2Installed at 6 p.m. the previous evening, that window ends between noon and 6 p.m. the next day — so the latex is inside its published window at 9 a.m., but only just.
- 3Treated with Ultra Hi-Float, the same balloon is published at 1–4 weeks (HI-FLOAT Company), which removes the timing question entirely.
- 4The foil accent is published at "at least 3–5 days" (Qualatex), so it holds overnight regardless.
- 5The published figures assume the room stays climate-controlled overnight. If the building shuts its air conditioning off, HI-FLOAT states hot, humid conditions halve the window — 9 to 12 hours for untreated latex.
Verdict: treat the latex and the night-before install is safe. Leave it untreated and the honest answer is to install on the morning of the event.
Conditions
What Shortens the Window
Why do outdoor balloons come down sooner?
No manufacturer publishes an outdoor float time. The HI-FLOAT Company states only that float times will be shorter outdoors, and instructs avoiding exposure to direct sunlight.
That gap is not an oversight. Sun load, wind, surface temperature and the swing between morning and afternoon vary too much between one storefront and the next for a single number to mean anything.
The practical consequence for a corporate installation is scheduling: outdoor décor is planned for the morning of the event, and the indoor published figure is treated as a ceiling rather than a promise. For a specific site, ask for a site-specific answer.
How much does temperature change the float window?
The HI-FLOAT Company states balloons typically float for half as long in hot, humid weather. That is the only published multiplier of its kind, and it is the one this page applies — an 18–24 hour window becomes 9–12 hours.
High humidity is called out separately: the HI-FLOAT Company states it will dramatically reduce a balloon’s floating life, and that treated balloons must be allowed to dry in an air-conditioned space in hot weather and a heated space in cold weather.
For anything between those two published states — a warm room with no air conditioning, or a cold loading dock — no figure exists. The calculator on this page shows a span between the two published anchors and says so, rather than inventing a multiplier.
Why are big corporate installations usually air-filled?
Because air-filled décor is not fighting buoyancy. The HI-FLOAT Company publishes that an untreated 11-inch air-filled balloon loses about 20% of its air in two months, and that a treated one stays full size for over a month.
Garlands, arches, columns and step-and-repeat frames are therefore built air-filled on a structure, which is why a conference garland can be installed the day before a multi-day summit without a float-time conversation at all.
Helium is reserved for what has to float — ceiling clusters, bouquets and hanging pieces. Those are the elements where the windows in the table above decide the install schedule. Sizing the structure itself is a separate question, covered by the balloon installation size calculator.
Common questions
Balloon Float Time FAQ
How long do 11-inch helium balloons last?
Qualatex publishes 18–24 hours for an untreated 11" latex balloon in standard and special colours, and 16–18 hours for metallic and pearl colours. Treated with Ultra Hi-Float, the HI-FLOAT Company publishes 1–4 weeks for standard colours and 1–3 weeks for metallic and pearl. All of those figures assume the balloons stay indoors in a climate-controlled location with the heater or air conditioner running.
Can balloons be installed the day before a corporate event?
It depends on the material. Foil balloons are published at "at least 3–5 days", 24" latex at 2–4 days, 3 ft giant latex at 3–5 days and Qualatex Bubble balloons in weeks, so all of those hold overnight comfortably. Untreated 11" latex is published at 18–24 hours, which makes a day-before install marginal — treating the latex with Ultra Hi-Float or installing on the morning of the event are the two reliable answers.
Why do balloons come down faster outdoors?
The HI-FLOAT Company states plainly that float times will be shorter outdoors and instructs avoiding exposure to direct sunlight. No manufacturer publishes an outdoor duration, because sun load, wind and temperature swing vary too much between sites. Treat any indoor figure as a ceiling for an outdoor installation, not an expectation, and ask for a site-specific answer for the actual location.
Does heat make balloons deflate faster?
Yes. The HI-FLOAT Company states that balloons typically float for half as long in hot, humid weather, and that high humidity will dramatically reduce a balloon's floating life. The published float-time tables are measured indoors with climate control running, so a warm room without air conditioning sits somewhere between the published window and half of it.
Do air-filled balloons on a frame last longer than helium ones?
They last far longer, because nothing has to stay buoyant. The HI-FLOAT Company publishes that an untreated 11-inch air-filled balloon loses about 20% of its air in two months, and that a treated air-filled latex balloon stays full size for over a month. That is why garlands, arches and columns for multi-day corporate stands are normally built air-filled on a frame rather than with helium.
Does this calculator use Balloon Décor’s own float measurements?
No. Every figure on this page comes from Qualatex, the HI-FLOAT Company or a named balloon industry publication, each linked in the Sources block. Balloon Décor has not published its own float testing, so nothing here is presented as its operational data, and no installation or setup duration is claimed anywhere on the page.
Sources
Where Every Figure on This Page Comes From
Each duration above is traceable to one of these. If a figure is not listed here, it is not on the page.
[1] Qualatex® Helium Chart (PDF) — Pioneer Balloon Company (Qualatex®)
Used for: Average flying times for untreated helium-filled latex balloons (9", 11" standard, 11" metallic and pearl, 16", 18", 24", 3ft giant) and the "at least 3–5 days" figure for helium-filled Microfoil® (foil) balloons. Also the chart's own note that actual flying times vary with temperature and atmospheric conditions, and that Ultra Hi-Float can increase latex flying times up to 25 times.
[2] HI-FLOAT — FAQs (float time table) — HI-FLOAT Company
Used for: Float times for balloons treated with ULTRA HI-FLOAT by size; the table's stated condition that "to achieve these float times balloons must be kept indoors, in a climate controlled location, with the heater or air-conditioner running"; "Float times will be shorter outdoors."; "Balloons typically float for half as long in hot, humid weather."; and the air-filled figure that an untreated 11-inch air-filled balloon loses 20% of its air in two months.
[3] HI-FLOAT — Balloons Don’t Float for Very Long — HI-FLOAT Company
Used for: That high humidity "will dramatically reduce a balloon's floating life", the instruction to avoid exposure to direct sunlight, and that float times for pearlized and metallic balloons are about a third less than for regular colours.
[4] HI-FLOAT — Basic Instructions — HI-FLOAT Company
Used for: That treated balloons take a few hours after inflation for the coating to dry, and that decorations can be prepared a day ahead of time.
[5] Balloon Basics — Bubble Balloons — The Very Best Balloon Blog (Sue Bowler, balloon industry educator)
Used for: Float times for Qualatex Bubble Balloons: approximately 2–4 weeks for the 22" Single Bubble, 7–10 days for the 20" Deco Bubble and 3–5 weeks for the 24" Deco Bubble.
Related
Where This Applies in Practice
Hold windows decide the install schedule, and the install schedule is negotiated with the venue. That is the operational half of branded balloon installations for Bay Area corporate events, where the format is chosen by what the venue permits as much as by the brand.
For a completed example of a large indoor installation built around a fixed access window, see the AWS Tech Summit 2025 balloon backdrop in San Francisco, and the BAMM conference installation at the Hyatt Regency SFO.
The other two free calculators are the installation size calculator and the event photo moment calculator.
Planning a Corporate Event in the Bay Area?
Tell us the event date, the venue and whether the installation is indoors or outdoors. Our team will review the brief and return a décor concept with a written proposal.