PreciousMetalCalc.comGold · Silver · Diamond
Diamond · 6 Calculators
Diamond Calculator
Free diamond calculators for value, weight, appraisal and resale. Instant price estimates using the 4C grading system.
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How It Works
01
Pick your calculator
Select the page that matches your item from the grid above.
02
Enter your item details
Input weight in grams, troy ounces or pennyweight. Diamonds use carat weight and 4C grades.
03
Get your instant estimate
See melt value, scrap value and what different buyer types pay.
04
Sell with confidence
Get at least 3 quotes. The melt value is your floor price. Never accept less than 60% of melt.
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About Our Diamond Calculators
Diamond pricing depends on four factors: carat, cut, color and clarity. Our calculators use a simplified 4C model to give a realistic market range.
The diamond weight calculator lets you estimate carat weight from physical mm measurements when a stone is set in jewelry and cannot be weighed directly. Always use a GIA-certified appraiser for insurance or selling decisions.