Carat converter: carats to grams, ounces, points and more

By HeyGema™ · Updated November 5, 2026

In short

1 carat is exactly 200 milligrams (0.2 grams, 100 points). The converter changes carats to grams, milligrams, ounces, troy ounces, pounds, grains and pennyweights, and back.

AmountFromTo

1 carats = 0.2 grams

1 carat is exactly 200 milligrams (0.2 grams). A point is one hundredth of a carat.

What is 1 carat in other units

Gram (g): Equals 1 carat: 0.2; 1 unit in carats: 5

Milligram (mg): Equals 1 carat: 200; 1 unit in carats: 0.005

Point (pt): Equals 1 carat: 100; 1 unit in carats: 0.01

Kilogram (kg): Equals 1 carat: 0.0002; 1 unit in carats: 5000

Ounce (oz): Equals 1 carat: 0.00705479; 1 unit in carats: 141.748

Troy ounce (ozt): Equals 1 carat: 0.00643015; 1 unit in carats: 155.517

Pound (lb): Equals 1 carat: 0.000440925; 1 unit in carats: 2267.96

Grain (gr): Equals 1 carat: 3.08647; 1 unit in carats: 0.323995

Pennyweight (dwt): Equals 1 carat: 0.128603; 1 unit in carats: 7.77587

Unit	Equals 1 carat	1 unit in carats
Gram (g)	0.2	5
Milligram (mg)	200	0.005
Point (pt)	100	0.01
Kilogram (kg)	0.0002	5000
Ounce (oz)	0.00705479	141.748
Troy ounce (ozt)	0.00643015	155.517
Pound (lb)	0.000440925	2267.96
Grain (gr)	3.08647	0.323995
Pennyweight (dwt)	0.128603	7.77587

Single converters

Carat or karat

Carat (ct) is a unit of weight for gemstones and pearls: 200 mg. Karat (kt or k) measures the purity of gold in 24ths: 24 karat is pure gold, 18 karat is 75% gold. They sound the same and are written differently.

Questions

A carat is 0.2 grams, exactly 200 milligrams.

100 points make 1 carat.

Weight. Size in mm depends on the shape and gem: see the carat to mm calculator.