**How long is 9 inches?** 9 inches is 22.86 cm or 7 inches is 228.6 mm or 7 inches is .75 ft.

Guesstimating 9 inches is a bit difficult task. Here is our guide which mentions the list of common household objects which are 9 inches long.

## Common things that measure 9 inches long

### 1) Two iPhone 5

A mobile phone’s length and height are determined by its brand and kind.

Furthermore, certain cellphones, such as Apple iPhones, are roughly four and a half inches tall, which is a nine-inch bisection.

Consider connecting two cellphones lengthwise. Now you can see a nine-inch estimated measurement.

### 2) One and a Half U.S. Dollar Bill

A standard dollar note in the United States measures 2.61 inches in height and 6.14 inches long. Consider how long a bill note would be. Visualize one dollar bill next to the half of another dollar bill to obtain a solid idea of nine inches.

### 3) Eight Thumbs

Although each thumb is different in size, an adult’s thumb is typically one inch long, or one-ninth of nine inches. Consider piling eight more thumbs on top of yours. This corresponds to nine inches.

You may also browse straight lines with your thumb and specify every inch. Both ways will assist you in visualizing what nine inches will look like.

**Also read: **13 Common Everyday Items That Are 5 Inches Long

### 4) Three Crayons

A brand-new, unused crayon is around three inches long, or one-third of a nine-inch length. By placing three crayons together from tip to tip, you may achieve an exact measurement of nine inches.

### 5) A Ruler

A ruler is one foot in length, or 12 inches, with a three-quarters measurement of nine inches. If you look at a ruler and subtract three inches from the total measurement, you’ll have a respectable estimate of nine inches.

### 6) A standard sheet of paper or a notebook

The typical printer paper used by Americans is eight and a half by eleven inches, making it an effective tool for determining the length of nine inches.

It’s worth looking at the shorter part of the paper because it’s only half an inch shorter than nine inches.

The longer side, on the other hand, is eleven inches long. Imagine deducting two inches from that, and you’ll have a close approximation.

Ordinary spiral notebooks, which are likewise eight and a half by eleven inches in size, can be used as a reference.

### 7) Half-Square Pillows

Most couch throw pillows or decorative bed pillows are 18 by 18 inches in size.

You may get an idea of how big nine inches is by dividing the size of one throw cushion in half.

Because most lengthier bed pillows are around 18 inches tall, you can see nine inches by halving their whole length.

**Also read: **25 Common Items That Are 6 Inches Long

### 8) Half a Doll

Dolls come in a variety of forms and sizes, but the average size is around 18 inches.

A typical girl’s doll stands around one and a half feet tall. As a result, half the height of your favorite young girl toy equals an average measurement of nine inches.

There are several varieties of dolls available. Some areas little as 8 inches in diameter and as large as 10 inches in diameter.

Using dolls of this size, it’s simple to estimate a nine-inch measurement because their proportions are similar.

### 9) A Plate for Lunch

Lunch plates can be tiny or huge, but the average plate is nine inches in diameter. This will give you a better idea of what nine inches looks like.

Bread plates of a six-inch diameter, or two-thirds of a nine-inch diameter, can be used. This information may be used on nine-by-nine or six-by-six square-shaped plates.

### 10) A Third of the Size of a Regular Bike Tire

Although bike tires come in a variety of sizes, the majority have a diameter of 27 inches. Nine-inch bike tires are three times the size of 27-inch bike tires.

Divide the 27-inch diameter of each tire by three. Every third is an outstanding and precise nine-inch measurement.

### 11) Three Hockey Pucks

A legal hockey puck must be 1 inch thick and 3 inches in diameter, according to the National Hockey League. In hockey puck terminology, measuring 9 inches is simple—just line up three of them side by side in a straight line.

Of course, the state of the hockey puck is a factor. A hockey puck has an expected lifespan of 2 to 3 minutes in a professional competition. When a player knocks the puck, it gets a bit warmer and softer, making it more susceptible to chipping and shattering. If you had a brand new hockey puck, three of them will bring you to exactly 9 inches.

**Also read: **How Many Cups is 32 oz?

### 12) Three Baseballs

Baseballs are comparable to hockey pucks in that they can have a diameter of 3 inches. A Major League Baseball playing ball’s diameter ranges from 2-7/8 to 3 inches. In any case, if you have three of them of any legal size, you’ll be close to 9 inches.

A single professional match takes between 90 and 120 balls, according to the MLB. This isn’t even taking into consideration home runs. A baseball may only be used for around eight pitches before it must be retired. To make up for the lost size of the baseball in your mind’s eye, you’ll need more of them to reach 9 inches.

### 13) A Basketball

A regulation basketball must have a diameter of 29.5 inches, according to the National Basketball Association. Simply divide the circumference by pi (3.14-ish) to obtain the diameter of the ball, which comes out to 9.39 inches, which is slightly above the 9-inch threshold.

Of course, this is only true if you’ve inflated the ball according to NBA regulations. A regulated ball used in professional matches must be inflated to 7.5 to 8.5 PSI, according to the book. If you have a slightly flattened basketball in your garage, it may have a slightly larger diameter than an NBA-approved ball.

### 14) Two Soda Cans

The size of a soda can varies by nation. Soft drinks are sold in 500-milliliter cans in some countries, such as Iceland and China, which is equal to half a liter or 16.9 fluid ounces. In the United States, a normal soda can holds 12 fluid ounces of liquid.

Because such a can is 4.83 inches tall, you’d only need two of them to reach 9 inches. If your reference is a 12-fluid-ounce “tall and slender” can that stands 6.125 inches tall, one and a half of them will get you to the full 9 inches.

### 15) Twelve Quarters

A quarter-dollar coin is 0.75 inches broad, according to the United States Mint. So, if you have 12 freshly minted quarters, laying them flat and side by side will give you a precise measurement of 9 inches. Even if your quarters were somewhat distorted, you might just be a few millimeters off.

If you wanted to measure 9 inches tall with only quarters, you should know that a quarter is 1.52 millimeters thick, or 0.06 inches thick. So, with $50 in quarters (equivalent to 200 quarters), you’d be able to go to exactly 9 inches.

**Also read: **Common Everyday Items That Are 7 Inches Long

## Conclusion

Measuring 9 inches in length or height using the things described above as an imagined reference shouldn’t be too difficult. Of course, there is some margin for error when measuring without a ruler or tape measure, but that comes with the territory.

- Common things that measure 9 inches long
- 1) Two iPhone 5
- 2) One and a Half U.S. Dollar Bill
- 3) Eight Thumbs
- 4) Three Crayons
- 5) A Ruler
- 6) A standard sheet of paper or a notebook
- 7) Half-Square Pillows
- 8) Half a Doll
- 9) A Plate for Lunch
- 10) A Third of the Size of a Regular Bike Tire
- 11) Three Hockey Pucks
- 12) Three Baseballs
- 13) A Basketball
- 14) Two Soda Cans
- 15) Twelve Quarters
- Conclusion