Updated Gemstone Carat Estimator

Precious Stone Weight Calculator

Estimate gemstone carat weight from length, width, depth, shape and specific gravity. Get instant carat, gram and milligram values for diamonds and colored stones.

Carat Estimate From Dimensions Shape Factors For Common Cuts Specific Gravity Adjustment Carats, Grams And Milligrams

Estimate Gem Weight From Dimensions And Shape

Enter the visible dimensions of your gem, pick a shape and gemstone type, and the Precious Stone Weight Calculator estimates carat weight using standard gem-cutting formulas scaled by specific gravity.

Dimensions should be in millimeters. For round stones, enter the average diameter and depth. For fancy shapes, use maximum length and width. Specific gravity is pre-filled for common gems but can be edited.

What Precious Stone Weight Calculator Calculates

Use Precious Stone Weight Calculator to estimate gemstone carat weight from length, width, depth, shape and specific gravity.

Related tools in this category are listed under Gemstone Calculators.

Precious Stone Weight Calculator Inputs

Precious Stone Weight Calculator uses Stone Shape, Gemstone Type, Specific Gravity (SG), Diameter (mm), Width (mm).

Precious Stone Weight Calculator Formula or Method

  • Carat ≈ d² × D × 0.0061 = 6.5² × 4.0 × 0.0061
  • Grams = Carats × 0.2 Milligrams = Grams × 1000 = Carats × 200
  • Carat ≈ d² × D × 0.0061

Reading Precious Stone Weight Calculator Results

The results include Estimated Weight, Approximate Grams, Approximate Milligrams, Shape And Factor, Specific Gravity Used.

Alongside Precious Stone Weight Calculator, use Stone Density Weight Calculator to convert stone or gemstone volume and density into weight in grams, kilograms, carats and ounces using the core physics formula mass = density × volume.

For a different result from Precious Stone Weight Calculator, Stone Dimension Estimator can convert between carat weight and approximate stone dimensions using shape factors and specific gravity for common gemstone types.

Calculators Related to Precious Stone Weight Calculator

After checking Precious Stone Weight Calculator, use Cabochon Weight Calculator to estimate cabochon gemstone weight from length, width, height and specific gravity. When you need to estimate the carat and gram weight of faceted gemstones using length, width, depth, shape and specific gravity, use Faceted Gemstone Weight Calculator. Gemstone Weight Estimator Calculator covers a separate task: estimate gemstone weight from dimensions by combining length, width, depth, shape and specific gravity into a clear carat and gram calculation.

After checking Precious Stone Weight Calculator, use Gemstone Size to Carat Calculator to convert gemstone size in millimeters to estimated carat weight using shape-based volume formulas and gemstone specific gravity values. When you need to estimate diamond carat weight from length, width and depth in millimeters for round, princess, oval, emerald, pear, marquise, use Diamond Carat Weight Calculator. Gemstone Price Calculator covers a separate task: estimate gemstone value from carat weight and price per carat, with clarity and color adjustments and automatic price per gram and milligram.

After checking Precious Stone Weight Calculator, use Carat to Millimeter Size Calculator to convert gemstone carat weight into approximate millimeter dimensions for all major shapes.

Frequently Asked Questions About Precious Stone Weight Calculator

It is used to estimate gemstone carat weight from length, width, depth, shape and specific gravity.

It uses Stone Shape, Gemstone Type, Specific Gravity (SG), Diameter (mm), Width (mm).

Precious Stone Weight Calculator uses Carat ≈ d² × D × 0.0061 = 6.5² × 4.0 × 0.0061.

It returns Estimated Weight, Approximate Grams, Approximate Milligrams, Shape And Factor, Specific Gravity Used.

Check Stone Shape, Gemstone Type, Specific Gravity (SG) first. Differences can also come from rounding, unit choices, or a different formula or rule set.