carat

1 of 2

noun (1)

car·​at

variant spelling of karat

: a unit of fineness for gold equal to 1/24 part of pure gold in an alloy

carat

2 of 2

noun (2)

car·​at ˈker-ət 

ˈka-rət

: a unit of weight for precious stones equal to 200 milligrams

Frequently Asked Questions

What is the difference between a carat and a karat?

These two words are tricky, as one of them may refer both to the measurement of a precious stone's weight and to the purity of gold, while the other only refers to the purity of gold. Carat may be used for both, but karat is only employed in reference to gold.

What is weighed in carats?

Precious stones are weighed in carats; a single carat is equal to 200 milligrams. Carat is also a variant spelling of karat, which measures the purity (but not the weight) of gold.

How much is a carat?

If carat is serving as a variant spelling of karat, then it is measuring the fineness, rather than the weight, of gold; each carat is equal to 1/24 part of pure gold. If carat is being used in reference to precious stones, it is a unit of weight equal to 200 milligrams.

Examples of carat in a Sentence

Recent Examples on the Web

Noun

Tap the letters or the up and down carat on the display line. —Cody Godwin, USA Today, 4 June 2026

Saltzman estimated that the ring costs between $65,000 and $125,000, depending on the diamond shape, carat weight and quality. —Charlotte Phillipp, PEOPLE, 4 June 2026

Lipa, who recently stepped at the 2026 Cannes Film Festival wearing a similar design, appeared to wear a $567,000 iteration of the iconic collar that was encrusted with 75 carats of pavé diamonds within an 18kt white gold base. —Lara Walsh, InStyle, 2 June 2026

One of the highlights was a grand prize drawing for a beautiful 2-carat diamond ring donated by David Hayman Jewellers of Yorba Linda. —Sharon Hlapcich, Oc Register, 28 May 2026

Word History

Etymology

Noun (2)

Middle English carrat measure of fineness in gold, from Middle French carat measure of fineness in gold or of weight in gems, from Italian carato, from Arabic qīrāṭ bean pod, a small weight, from Greek keration carob bean, a small weight, from diminutive of kerat-, keras horn — more at horn

First Known Use

Noun (2)

1555, in the meaning defined above

Rhymes for carat

• buret
• ferret
• garret
• karat
• merit
• parrot
• demerit
• inherit
• preterit
• disinherit

Kids Definition

carat

1 of 2

variant of karat

carat

2 of 2 noun

car·​at ˈkar-ət 

: a unit of weight for precious gems (as diamonds) equal to 200 milligrams