This Cushion Diamond Cut Weight calculator computes the approximate weight of a cushion cut diamond based on the average diameter (vertical and horizontal can be entered in case the diamond face isn't precisely symmetrical), depth and girdle thickness factor.
INSTRUCTIONS: Choose units and enter the following:
Carat Weight (wt): The calculator returns weight of the diamond in carats. However, this can be automatically converted to other weight units (e.g. grams) via the pull-down menu.
The jewelers suite of calculators includes carat weight estimations of diamonds based on the cut diamonds shape and size that can be measured while still within a setting. This enables the jeweler to estimate the carat weigh of the diamond without damaging the setting.
Thethat are specific to diamonds and diamond cuts:
The carat weight equations and data used in vCalc's jewelry library and calculator were reviewed by a certified gemologist. The equations are based on industry recognized formulas and data. The table below shows a comparison of computations between vCalc and an industry accepted application (Quantum Leap).
The length, width and depth are in millimeters (mm), and the Quantum Leap and vCalc measurements are in carats (cwt).
The largest variance, an oval faceted alexandrite, which can be seen in the last row above, has been double checked against several source equations which tend to support vCalc's accuracy.