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Calibur vs. Caliber — Which is Correct Spelling?

Edited by Tayyaba Rehman — By Fiza Rafique — Updated on April 2, 2024
"Calibur" is a common misspelling. The correct spelling is "caliber," referring to quality or diameter of a bullet or barrel.
Calibur vs. Caliber — Which is Correct Spelling?

Which is correct: Calibur or Caliber

How to spell Caliber?


Incorrect Spelling


Correct Spelling

Key Differences

Think of the "e" in "measure" – you measure the "caliber" of a person or gun.
Remember, a bullet's "caliber" can be "deliberated," both having "e".
Associate "caliber" with excellence, both having an "e".
"Libra" balances quality, but "caliber" assesses it.
Visualize "caliber" with "measure" in the same frame.

How Do You Spell Caliber Correctly?

Incorrect: The calibur of his work has improved significantly.
Correct: The caliber of his work has improved significantly.
Incorrect: She is a writer of exceptional calibur.
Correct: She is a writer of exceptional caliber.
Incorrect: The calibur of the debate team is unmatched.
Correct: The caliber of the debate team is unmatched.
Incorrect: We only accept students of the highest calibur.
Correct: We only accept students of the highest caliber.
Incorrect: The sword of the highest calibur was awarded to the knight.
Correct: The sword of the highest caliber was awarded to the knight.

Caliber Definitions

Quality or capacity of someone's character.
The artist is of high caliber.
Diameter of a round or cylindrical body.
The pipes vary in caliber.
Degree of importance or significance.
An event of such caliber deserves attention.
The internal diameter of a gun barrel.
The pistol has a .45 caliber.
The diameter of the inside of a round cylinder, such as a tube.
The diameter of the bore of a firearm, usually expressed either in millimeters, in inches, or as a decimal fraction of an inch
.45 caliber.
The diameter of a projectile such as a bullet or artillery shell, corresponding to the caliber of the firearm from which it is to be fired.
Degree of worth; quality
A school of high caliber.
An executive of low caliber.
Diameter of the bore of a firearm, typically measured between opposite lands.
The diameter of round or cylindrical body, as of a bullet, a projectile, or a column.
A nominal name for a cartridge type, which may not exactly indicate its true size and may include other measurements such as cartridge length or black powder capacity. Eg 7.62×39 or 38.40.
Unit of measure used to express the length of the bore of a weapon. The number of calibres is determined by dividing the length of the bore of the weapon, from the breech face of the tube to the muzzle, by the diameter of its bore. A gun tube the bore of which is 40 feet (480 inches) long and 12 inches in diameter is said to be 40 calibers long.
(figuratively) Relative size, importance, magnitude.
(figuratively) Capacity or compass of mind.
(dated) Degree of importance or station in society.
(horology) Movement of a timepiece.
The diameter of the bore, as a cannon or other firearm, or of any tube; or the weight or size of the projectile which a firearm will carry; as, an 8 inch gun, a 12-pounder, a 44 caliber.
The caliber of empty tubes.
A battery composed of three guns of small caliber.
The diameter of round or cylindrical body, as of a bullet or column.
Fig.: Capacity or compass of mind.
A degree or grade of excellence or worth;
The quality of students has risen
An executive of low caliber
Diameter of a tube or gun barrel
Degree of worthiness or excellence.
The project showcased their professional caliber.

Caliber Meaning in a Sentence

A bullet's caliber refers to its diameter.
The caliber of the university's research is well recognized.
The high caliber of the speakers at the conference was impressive.
The caliber of evidence presented was not convincing.
The caliber of the competition has risen this year.
This job requires a person of a certain caliber.
In assessing a diamond, its caliber is as important as its clarity.
The caliber of craftsmanship in this watch is outstanding.
This museum showcases art of the highest caliber.
A person’s caliber is often revealed under pressure.
He is of the highest moral caliber.
Musicians of all calibers performed at the festival.
The caliber of the ingredients makes a difference in cooking.
The caliber of the applicant pool was exceptionally high this year.
The project was a test of the team's creative caliber.

Caliber Idioms & Phrases

Bullet caliber

The diameter of a bullet, typically measured in millimeters or inches.
The detective noted the bullet caliber to help identify the weapon used.

Of the highest caliber

Referring to something or someone of the utmost quality or excellence.
The chef is known for creating dishes of the highest caliber.

A person of caliber

An individual distinguished by exceptional qualities or abilities.
The company aims to hire persons of caliber to lead its development team.

Caliber of evidence

The quality or persuasiveness of evidence presented.
The case hinged on the caliber of evidence the prosecution could provide.

Raise the caliber

To improve the quality or standard of something.
The new director has significantly raised the caliber of productions at the theater.

Common Curiosities

What is the root word of caliber?

Derived from the French "calibre" which refers to diameter or quality.

What is the pronunciation of caliber?

"Caliber" is pronounced as "KAL-uh-ber."

Why is it called caliber?

The term originates from the measurement of the diameter of bullets or gun barrels.

What is the verb form of caliber?

Caliber is primarily a noun. There isn't a direct verb form.

Which vowel is used before caliber?

"A" as in "a high caliber."

Is caliber a negative or positive word?

Neutral, but can have positive connotations when referring to high quality.

Which preposition is used with caliber?

"Of" as in "caliber of the gun."

Which article is used with caliber?

"A" or "the" based on context.

What is the plural form of caliber?


Is caliber an adverb?


What is the singular form of caliber?


Is caliber an abstract noun?

In the context of quality or character, yes.

Is caliber a vowel or consonant?

"Caliber" is a word containing both vowels and consonants.

Is the caliber term a metaphor?

It can be used metaphorically when referring to quality or character.

What is the opposite of caliber?

Inferiority or lack of quality.

Which determiner is used with caliber?

"This" or "that" can be used, e.g., "this caliber of work."

Which conjunction is used with caliber?

Any conjunction can be used, depending on the sentence.

How do we divide caliber into syllables?


What is a stressed syllable in caliber?

The first syllable, "cal."

What is another term for caliber?

Quality or grade.

What is the first form of caliber?


What is the third form of caliber?


Is caliber a noun or adjective?

"Caliber" is primarily a noun but can be used as an adjective in contexts like "high-caliber performance."

Is caliber a collective noun?


What part of speech is caliber?


What is the second form of caliber?

N/A as it's a noun.

Is the word caliber imperative?


How is caliber used in a sentence?

"The caliber of his work distinguishes him from his peers."

Is caliber a countable noun?

Yes, especially when referring to different types or grades.

How many syllables are in caliber?

Three syllables.

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Author Spotlight

Written by
Fiza Rafique
Fiza Rafique is a skilled content writer at, where she meticulously refines and enhances written pieces. Drawing from her vast editorial expertise, Fiza ensures clarity, accuracy, and precision in every article. Passionate about language, she continually seeks to elevate the quality of content for readers worldwide.
Tayyaba Rehman is a distinguished writer, currently serving as a primary contributor to As a researcher in semantics and etymology, Tayyaba's passion for the complexity of languages and their distinctions has found a perfect home on the platform. Tayyaba delves into the intricacies of language, distinguishing between commonly confused words and phrases, thereby providing clarity for readers worldwide.

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