Carats to Ounces (ct to oz) Converter

How to convert carats to ounces

Formulaoz = ct × 0.00705479239

Multiply the value in carats by 0.00705479239. To go the other way, multiply by 141.7476156 (or divide by 0.00705479239).

A carat is smaller than an ounce: it takes 141.7476156 carats to make one ounce.

Worked examples

1 carat1 ct × 0.00705479239 = 0.00705479239 oz
5 carats5 ct × 0.00705479239 = 0.03527396195 oz
10 carats10 ct × 0.00705479239 = 0.0705479239 oz
20 carats20 ct × 0.00705479239 = 0.1410958478 oz
100 carats100 ct × 0.00705479239 = 0.705479239 oz

Carats to ounces conversion table

Values are calculated by the conversion engine and rounded to 8 significant figures.

Carats to ounces: 0.1–10 ct
Carats (ct)	Ounces (oz)
0.1 ct	0.00070547924 oz
0.25 ct	0.0017636981 oz
0.5 ct	0.0035273962 oz
1 ct	0.0070547924 oz
2 ct	0.014109585 oz
3 ct	0.021164377 oz
4 ct	0.02821917 oz
5 ct	0.035273962 oz
6 ct	0.042328754 oz
7 ct	0.049383547 oz
8 ct	0.056438339 oz
9 ct	0.063493132 oz
10 ct	0.070547924 oz

Carats to ounces: 12–1,000 ct
Carats (ct)	Ounces (oz)
12 ct	0.084657509 oz
15 ct	0.10582189 oz
20 ct	0.14109585 oz
25 ct	0.17636981 oz
30 ct	0.21164377 oz
40 ct	0.2821917 oz
50 ct	0.35273962 oz
75 ct	0.52910943 oz
100 ct	0.70547924 oz
250 ct	1.7636981 oz
500 ct	3.5273962 oz
1,000 ct	7.0547924 oz

About the units

Carat (ct)

The metric carat is exactly 200 mg and is used to weigh gemstones. (Karat, a gold-purity scale, is a different thing.) One carat equals 0.0002 kilograms (kg).

Ounce (oz)

One sixteenth of a pound: exactly 28.349523125 g. Not to be confused with the fluid ounce (volume) or the troy ounce used for precious metals. One ounce equals 0.02834952313 kilograms (kg).

Frequently asked questions

How many ounces are in one carat?

There are 0.00705479239 ounces in one carat, and this value is exact by definition.

How do I convert carats to ounces?

Multiply the number of carats by 0.00705479239. For example, 10 ct × 0.00705479239 = 0.0705479239 oz.

How many carats are in one ounce?

One ounce equals 141.7476156 carats. That is the reverse factor, 1 ÷ 0.00705479239.

What is 10 carats in ounces?

10 ct = 0.0705479239 oz.

Is this ct to oz converter accurate?

Yes. Both units are defined exactly in terms of SI units, so the conversion factor is exact; results are shown to 12 significant figures by default and you can change precision in the converter. Calculations run in your browser using the same tested engine that generated this page.

Carats to Ounces Converter