Converters
Carat to gram and ounce converter
Gem weights are given in carats, but metal, parcels and shipping use grams and ounces. Enter a weight and see it in every unit.
- Points (1/100 ct)
- 100
- Grams (g)
- 0.2
- Milligrams (mg)
- 200
- Kilograms (kg)
- 0.0002
- Troy ounces (oz t)
- 0.00643
- Ounces (oz)
- 0.007055
- Pennyweight (dwt)
- 0.128603
Carat = 0.2 grams
One metric carat is exactly 0.2 grams, so 5 carats weigh 1 gram. A point is one hundredth of a carat.
Troy and ordinary ounces differ
A troy ounce (used for precious metals) is 31.1035 g. An ordinary avoirdupois ounce is 28.3495 g. Check which one your buyer means.
Weigh on a calibrated scale
For trade, use a scale checked against reference weights, and record weight to two decimals for cut stones.
How to use it
- Type the weight.
- Choose the unit you are converting from.
- Read the weight in every other unit.
Frequently asked questions
How many carats are in a gram?
There are 5 carats in a gram.
How many carats are in a troy ounce?
A troy ounce is about 155.52 carats.
Is a carat the same as a karat?
No. Carat measures gemstone weight. Karat (K) measures the purity of gold.