Gemstone Carat Calculator

Enter the dimensions of your gemstone (in mm) and select its type, shape, and cut to calculate the carats:

Select Gemstone Type: --Select Type-- Diamond Sapphire Emerald Ruby Amethyst Topaz Lapis Lazuli Labradorite Onyx Agate Amethyst Pearl Zircon Sunstones Garnet Opal Aquamarine Peridot Apatite Beryl Coral Lolite Cat's Eye Blue Sapphire Yellow Sapphire
Select Gemstone Shape: --Select Shape-- Round Oval Pear Square Heart
Select Gemstone Cut: --Select Cut-- Brilliant Step Mixed
Length:
Width:
Depth:
Calculate Carats