Convert ounce to carat (troy)

Here you can quickly calculate how many carat (troy) fit in one ounce.

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Example: ounce to carat (troy)

Starting value Increment Accuracy

To convert ounce to carat (troy), multiply by 138.290357.

1 oz = 138.290357 ct t

Example: 1 ounce = 138.290357 carat (troy)

The everyday avoirdupois ounce is about 28.35 g, but precious metals are priced in troy ounces of about 31.10 g. An 'ounce of gold' is nearly 10% heavier than an ounce of flour. Use troy ounces for gold and silver, the regular ounce for everything else.
The carat used for gemstones is a unit of mass: exactly 0.2 g, so a 5-carat diamond weighs 1 gram. The karat used for gold is something else entirely, a purity scale where 24k is pure gold and 18k is 75% gold. The two cannot be converted into each other.

Score: 0

8.7 carat (troy) equals 0.0629 ounce.

Correct answer: 8.7 carat (troy) = 0.0629 ounce.

0.2 ounce equals 16.6 carat (troy).

Correct answer: 0.2 ounce = 27.7 carat (troy).

209 carat (troy) equals 0.756 ounce.

Correct answer: 209 carat (troy) = 1.51 ounce.

217 carat (troy) equals 2.35 ounce.

Correct answer: 217 carat (troy) = 1.57 ounce.