Balloon Arch Calculator

If you are planning a fancy party with a LOT of balloons involved, our balloon arch calculator will help you calculate how many balloons for a balloon arch — the perfect one! 🎈

Learn how to make a balloon arch with the just-right number of balloons: keep reading to learn the different types of arches and how to calculate how many balloons you need!

Here you will learn:

• How to make a balloon arch;
• The types of balloon arches; and
• How to calculate the perfect number of balloons for your decorations.

If you are hosting an important event, from a graduation 🎓 to a wedding 💒, and you want to spotlight a certain part of the venue, you may need a balloon arch.

Who doesn't love balloons? Ok, maybe not everyone loves balloons, but if they don't explode or fly away, they look nice! That's why a balloon arch may be the best choice to create that ethereal doorframe where you can take the best pictures of the event.

But it's not that easy!

To make a balloon arch, you first have to choose how you want it to look: tall, short or balanced? This will help our balloon arch calculator give you the correct answer. Choose the size of your arch: the essential measurements are the height and the width.

You then have to choose how the style of your arch: a single row of balloons or a complex garland?

And then some other details: do you want air-filled balloons or helium-filled ones? And what about the size and color?

If you plan to make an air-filled balloon arch, you will need a rather sturdy frame to hang them. A metal wire or other appropriate support you can easily find online will do the job. On the other hand, helium will make balloons float: you won't need any support!

We explored the science of helium-filled balloons and their ability to float at our helium balloons calculator and buoyancy calculator.

If you decide to make a single row "pearls' string" arch, you will have to secure each balloon apart from the other. If you opted for a fancy garland, choose how many balloons you want to use for each "turn" and tie them together.

Once you get your balloons, it's time to inflate them. We strongly suggest you buy a pump: you may end up with almost 200 balloons, and trust us, you don't want to blow them up yourself!

The critical quantity that you need to know before buying too many balloons is the length of the balloon arch. To calculate it, first, choose the height $h$ and width $w$ of the arch. Then, follow the formulas to find it:

To calculate the number of balloons you need for an arch, we apply a simple formula, which depends on the diameter $d$ of the balloons. It's not really scientific, but it works!

To find the perfect number of balloons for your arch, round the results to the nearest integer. If you choose a single row arch:

This means that to cover a meter of arch with balloons with diameter $11"$, we need:

$3$ balloons for each meter of length of the arch, around $1$ balloon per foot. Use our length converter to switch between meters and feet!

If you chose to make a garland arch, you can use two formulas according to the number $n$ of balloons in each turn:

Again, remember to round your result: half balloons are not good balloons!

To find how many balloons for a balloon arch, define the type of arch in our calculator:

• Input the height and width of the arch
• Select if the arch is single row or garland.

Then, insert the measurements of your arch and select the diameter of the balloons. And... that's it!

Let's say that you want a $10$ feet tall, $6$ feet wide arch, and you chose a fancy five balloons garland. Since the arch's height is bigger than its width, we calculate the length using:

Do you want to make it with $11"$ balloons? Easy: insert the value in the Diameter field, and remember to choose the correct units in our calculator: we will do the math for you:

Note that we applied a conversion from inches to feet.

That's quite a lot of balloons! That's why you need that pump. 😉

We added a quick functionality that allows you to calculate the budget for a balloon arch! The price obviously varies (and usually, the more balloons you buy in a single batch, the less you pay for them): we gave you some indicative values that can help you estimate your expenses!

We have to say this: balloons look nice, but they are bad for the environment. Apart from being single-use (making a lot of waste), they pose a great risk to wildlife, in particular, if they float around.

And trust us — they float a lot: the author once found the remains of a bright green balloon a few meters shy of 3 km above sea level, in the deep of the mountains!

Remember to dispose of them correctly and not to let them escape. They look nice to us, but they might like food for many animals. And if you care for the environment, search for more friendly alternatives: paper makes beautiful decorations, or fly some kites! You will be as happy, and nature will thank you. 🌎