1 Carats to Grams
1 ct = 0.2 g
1 carat equals 0.2 grams.
How to convert 1 ct to g
Use the formula g = ct × 0.2:
g = 1 × 0.2g = 0.2
So 1 ct = 0.2 g.
Rounded values and quick estimate
- Rounded to a whole number: 0 g
- Rounded to one decimal place: 0.2 g
- Conversion factor: 1 carat = 0.2 grams
This conversion is exact, so there is no need to estimate: just multiply by 0.2.
1 Carats in other units
A 1-carat diamond weighs 0.2 g (200 mg). Carat measures weight, not size — though a well-cut 1 ct round diamond is about 6.5 mm across.
- Grams
- 0.2 g
- Kilograms
- 0.0002 kg
- Ounces
- 0.007055 oz
- Pounds
- 0.000441 lb
- Stone
- 0.000031 st
- Milligrams
- 200 mg
- Micrograms
- 200000 mcg
- Troy ounces
- 0.00643 ozt
- Tolas
- 0.0171 tola
- Grains
- 3.09 gr
1 ct and nearby values
About carats and grams
A metric carat is exactly 200 milligrams (0.2 g). It is the standard unit of weight for diamonds and gemstones.
A gram is one thousandth of a kilogram. It is the standard metric unit for food, ingredients and small weights.
Related conversions
Frequently asked questions
What is 1 Carats in Grams?
1 carat is 0.2 grams (1 ct = 0.2 g).
How do you convert 1 ct to g?
Apply g = ct × 0.2: g = 1 × 0.2, g = 0.2.
How many carats is 0.2 g?
0.2 g is about 1 carat.