Carats (Metric) to Grams Converter
Carats (Metric) to Grams Converter
The carat is the international standard unit for weighing diamonds and other gemstones, standardized in 1907 to exactly 200 milligrams so that gem weights would be consistent worldwide.
This tool goes beyond carats and grams: the "From" and "To" dropdowns also cover the gemological "point" (1/100 of a carat) plus the full range of other mass units, including troy units for precious metal settings.
- Conversion factor: 1 metric carat = exactly 0.2 grams (200 milligrams), an internationally standardized value since 1907.
- Fully flexible: change either dropdown to convert between any two of the 25+ supported mass units.
- Don't confuse "carat" with "karat": carat (gemstone weight) is completely different from karat (gold purity, e.g. "18 karat gold") — they sound alike but measure different things entirely.
How many grams are in a carat?
1 metric carat equals exactly 0.2 grams (200 mg). To convert, multiply the carat value by 0.2.
What is a "point" in gemstone weight?
A point is 1/100 of a carat (2 mg) — used for very precise small-stone weights, e.g. "75 points" means 0.75 carats.
Carats (Metric) to Grams Converter
The carat is the international standard unit for weighing diamonds and other gemstones, standardized in 1907 to exactly 200 milligrams so that gem weights would be consistent worldwide.
This tool goes beyond carats and grams: the "From" and "To" dropdowns also cover the gemological "point" (1/100 of a carat) plus the full range of other mass units, including troy units for precious metal settings.
- Conversion factor: 1 metric carat = exactly 0.2 grams (200 milligrams), an internationally standardized value since 1907.
- Fully flexible: change either dropdown to convert between any two of the 25+ supported mass units.
- Don't confuse "carat" with "karat": carat (gemstone weight) is completely different from karat (gold purity, e.g. "18 karat gold") — they sound alike but measure different things entirely.
How many grams are in a carat?
1 metric carat equals exactly 0.2 grams (200 mg). To convert, multiply the carat value by 0.2.
What is a "point" in gemstone weight?
A point is 1/100 of a carat (2 mg) — used for very precise small-stone weights, e.g. "75 points" means 0.75 carats.