1. What is the Carat Weight Formula?

The carat weight formula calculates the weight of a gemstone based on its dimensions and specific gravity. For round-shaped stones, the formula is length × width × depth × specific gravity × 0.0018.

2. How Does the Calculator Work?

The calculator uses the carat weight formula:

Where:

• \( Length \) — Length in millimeters (mm)
• \( Width \) — Width in millimeters (mm)
• \( Depth \) — Depth in millimeters (mm)
• \( Specific\ Gravity \) — Density relative to water (dimensionless)
• 0.0018 — Conversion factor for round-shaped stones

Explanation: The formula accounts for the volume of the stone and its density to calculate weight in carats.

3. Importance of Carat Weight Calculation

Details: Accurate carat weight estimation is crucial for gemstone valuation, setting prices, and jewelry design.

4. Using the Calculator

Tips: Enter dimensions in millimeters, specific gravity value (common values: Diamond=3.52, Ruby=4.00, Sapphire=4.00). All values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: Does this formula work for all gemstone shapes?
A: This formula is specifically for round-shaped stones. Other shapes may require different conversion factors.

Q2: What are typical specific gravity values?
A: Diamond=3.52, Ruby=4.00, Sapphire=4.00, Emerald=2.72, Quartz=2.65. Values vary by gem type.

Q3: How precise is this calculation?
A: It provides a good estimate but actual weight may vary slightly due to cut variations and inclusions.

Q4: Why measure in millimeters?
A: Gemstone dimensions are typically measured in millimeters for precision in the jewelry industry.

Q5: What's the difference between carat and karat?
A: Carat (ct) measures gemstone weight (1ct=0.2g), while karat (K) measures gold purity (24K=100% gold).