Carat Weight Converter

Carat weight is the universal standard for measuring gemstones and diamonds. One carat equals exactly 200 milligrams or 0.2 grams, a standard established internationally to ensure consistency in gemstone trading and evaluation worldwide.

The point system provides precision for smaller gemstones, where one point equals 1/100th of a carat. This subdivision is essential for accurate pricing and grading, as even small differences in weight can significantly impact a gemstone's value, especially in high-quality diamonds.

Diamond grading certificates typically report weights to the nearest hundredth of a carat (two decimal places), making point conversions crucial for understanding exact specifications. A 50-point diamond equals 0.50 carats, while a 75-point stone equals 0.75 carats.

Professional gemologists and jewelers must understand these conversions for accurate appraisals and transactions. The precision of carat weight measurements affects insurance valuations, resale values, and authentication processes in the luxury gemstone market.

Modern digital scales in gemology laboratories measure to precise decimal places, but understanding traditional point notation remains essential for industry communication and historical record interpretation. This standardization ensures global consistency in gemstone commerce and certification.