1. What is Carat Weight?

Carat is the standard unit of weight for gemstones. One carat equals 0.2 grams (200 milligrams). The term comes from the carob seeds that were historically used as counterweights in balance scales.

2. How Does the Calculator Work?

The calculator uses the simple conversion formula:

Where:

• 1 carat = 0.2 grams
• 1 gram = 5 carats

Explanation: The calculation converts metric weight (grams) to the standard gemstone weight measurement (carats).

3. Importance of Carat Measurement

Details: Carat weight is one of the "Four Cs" (along with cut, color, and clarity) that determine a gemstone's value. Larger stones are rarer and typically more valuable per carat than smaller stones of the same quality.

4. Using the Calculator

Tips: Enter the weight in grams (must be greater than 0). For best accuracy, use a precise digital scale that measures to at least 0.01 grams.

5. Frequently Asked Questions (FAQ)

Q1: Is carat weight the same as size?
A: No, carat measures weight not dimensions. Two gems of the same carat weight can appear different sizes based on their density and cut.

Q2: How precise should carat measurements be?
A: Gemstones are typically weighed to the hundredth of a carat (0.01 ct). Very small stones may be measured in points (1 point = 0.01 carat).

Q3: Does carat weight affect value linearly?
A: No, larger stones often command higher prices per carat due to their rarity. A 2-carat stone is typically worth more than twice a 1-carat stone of equal quality.

Q4: Are all gemstones measured in carats?
A: While most gemstones use carats, pearls are often measured in grains (1 grain = 0.25 carats) and momme weight is used for cultured pearls.

Q5: How does carat differ from karat?
A: Carat (ct) measures gemstone weight, while karat (K or kt) measures gold purity (24K being pure gold).