13 Everyday Things That Are About 30 Centimeters Long (+Pics)

Are you interested in knowing what 30 centimeters looks like? 

Or what item is 30 centimeters long

Well, don’t click away! 

Thirty centimeters is a popular unit of measurement for everyday tasks, especially in regions using the metric system. 

Hence, knowing how long it is is crucial for practical purposes in various aspects of daily life, education, and professional fields.

It can help you convert different units of measurement, like inches or meters.

It can also ensure accuracy when measuring or cutting something precisely, such as fabric, paper, or wood.

Moreover, it can be a fun way to learn about the world around you if you are a dimensions enthusiast.

So, to help you make informed decisions regarding the length of 30 centimeters, this post is a curated list of 15 things that are about 30 centimeters long that you can use as reference points.

Read: 9 Everyday Things That are 15 Centimeters Long

Read through to find what suits your needs and interests the best.

Things That Are About 30 Centimeters Long

1. A Standard Ruler

The first item takes you back to school. 

A standard ruler reminds you of your time in school, particularly during math and science classes, where rulers were everyday items.

And if you can remember how long it is, it’s all you need to understand how long 30 centimeters is since it’s just as long.

2. 2 Pens

When discussing small length and you mention a standard ruler, it’s justice to follow up with a pen. 

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Similarly to the standard ruler, pens trigger nostalgia for school days, reminding individuals of their time in the classroom, interactions with teachers and classmates, and the overall learning atmosphere.

Pens come in various styles, from ballpoint pens to rollerball pens to fountain pens, each with unique characteristics and uses. 

That said, they are almost equal, ranging from 5.11 inches to 5.5 inches long or approximately 14 centimeters. 

Therefore, two pens end-to-end are only two inches shy of 30 centimeters.

3. 1 & 1/2  No. 2 Pencils

Another classic school item, No. 2 pencils, is an excellent way to understand how long 30 centimeters is. 

Don’t let the name confuse you; a No. 2 pencil is the standard pencil you used from elementary school to high school and college, so its image resides in your mind rent-free, undoubtedly. 

When brand new, the standard pencil is 7.5 inches (19.05 cm) long, meaning picturing one and a half placed in a row gives you a mental picture of something close to 30 centimeters.

4. 2 US Dollar Bills

US dollar bills are an excellent way to envision short lengths such as six inches since almost everyone in the United States can relate to them. In fact, you might be having a couple right now in your pocket. 

If you’ve been keen enough, you must have noticed that all US dollar notes are equal (in dimensions), measuring 6.14 inches (15.5 centimeters) long and 2.61 inches wide. 

So, all you have to do is arrange two lengthwise on a flat surface to get a perspective of 30 centimeters.

5. 12 US Quarters

On the same page of currency, the US quarter dollars are also reliable for measurements, moreso short ones such as one inch, since they have a diameter of 0.955 inches.

So, using them to paint a picture of 30 centimeters, you need as many as twelve. 

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They’re the most preferred coins in coin-operated devices, including parking meters and laundry machines – so you might have a few at home.

6. 6 Business Cards

Business cards are small, printed cards carrying details such as the person’s name, job title, company name, phone number, email address, and website.

They are perfect references for tiny lengths starting with two inches since they are just as long. They may vary, but the difference is usually negligible.

So, while it’s unlikely to have as many as six business cards handy, you can imagine placing them in a row end to end width-wise. They stretch to precisely 30 centimeters.

7. A 2-liter Soda Bottle

It has been a common practice in many countries, including the United States, for people to purchase a 2-liter soda bottle when they have unexpected visitors.

It’s convenient for sharing with multiple people, providing a quick way to enjoy a refreshment beverage without requiring extensive preparation.

The bottle is a reliable reference for 30 centimeters as it is 12.4 inches (31 centimeters) in height.

8. 1 & 1/2 Adult Toothbrushes

Well, you can afford to not know all the items we mentioned above, but not this one! 

Must-have household objects, toothbrushes are indispensable tools for maintaining oral health and preventing dental problems.

They come in various designs, including manual and electric (powered) toothbrushes, but those meant for adults measure anything between 7 and 8 inches, almost the same size as pencils.

So, as you would expect, one and a half an adult toothbrush represents 30 centimeters when arranged end-to-end.

9. 3 Regular Toilet Paper Rolls

Toilet paper rolls and toothbrushes are in the same group! You can’t afford to miss them in every household you walk into. 

They’re available in three types, i.e., standard, jumbo, and commercial sizes. But here, we’re only interested in the standard size since it’s the most common in many households. 

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These standard toilet paper rolls have a diameter of 4 inches and are 4.5 inches wide.

That means three arranged in a straight line on a flat surface area 30 centimeters long.

10. A King-size Submarine Sandwich

King-size sandwiches are a staple in the fast-food industry and are enjoyed by many for their convenience and customizable options.

These sandwiches are notably large, often measuring 12 inches (30 centimeters). 

This generous size makes them a filling meal option, and they are sometimes shared among multiple people, making them suitable for group gatherings or parties. 

Some relatable examples include Italian Sandwich, Heros, Rocket, Torpedo, Hoagie, Grinder, Dagwood, Hero, and Zeppelin.

11. 2 iPhone 13s

There might be upgrades after the launch of the iPhone 13, but the smartphone remains one of the most popular to date.

iPhone 13 belongs to the large-screen category of smartphones, measuring 15.4 centimeters long diagonally.

Therefore, two iPhone 13s can help you with a mental image of 30 centimeters.

12. A Stack of 12 Hockey Pucks

Hockey pucks are flat, circular discs made of vulcanized rubber. They’re integral to ice hockey, serving as the game’s focal point.

A regulation NHL hockey puck has a height of one inch and a diameter of 3 inches.

Therefore, a stack of twelve standard hockey pucks is 12 inches (30 cm) high.

Alternatively, you can imagine four arranged end-to-end as they also measure the same.

Read: 10 Things That Are 20 Centimeters Long (With Pictures)

13. 12 Bottle Caps

Bottle caps come in different sizes and styles to fit various bottle necks and openings.

Standard cap sizes are used for common bottle types and have a diameter of 30 millimeters (3 cm), making them excellent references for 3 centimeters long. 

But if you can get as many as ten, they would give you an impression of how long 30 centimeters is.

About Kevin Jones

My name is Kevin Jones, and I'm the proud founder of this website. I'm a self-professed measurement enthusiast, and I've been passionate about measuring things for as long as I can remember. On this website, you'll find information on all aspects of dimensions, including measurements and weight of stuff.