Diamond Weight
Calculator

Use our Diamond Weight Calculator to estimate what your loose diamonds could potentially be worth.

Diamond Weight
Calculator

Use our Diamond Weight Calculator to estimate what your loose diamonds could potentially be worth.

Step 1: Your Diamond Shape

Select the shape of your largest diamond below:

Step 2: Your Diamond Dimensions

This will be the same number for the widest point for round diamonds.
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Diamond Diagram
Diamond Carat Size Chart

DOWNLOAD OUR CHART

Diamond Carat Size Chart

Download our Free Diamond Carat Size Chart to see how diamonds of different shapes and different carat weights look from the top down.

Print the chart to compare your diamond and see what carat weight it is.

Download PDF
Diamond Value

HOW CARAT WEIGHT IMPACTS PRICE

Value Of Diamonds

The price of diamonds fluctuates greatly depending on carat size. Our diamond weight calculator will provide information about your item that will help determine its diamond price and diamond value.

myGemma will not be able to rely exclusively on the data you provide when we make our final offer, but it will give us an approximation of carat weight which we can use in our estimate calculations.

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Our Diamond Weight Calculator

Use the diamond carat weight calculator to provide myGemma with information about the carat weight of your diamond. To establish an estimate of the weight of your diamond:

  • 1. Measure the length, width and height of your diamond in mm
  • 2. Enter the measurements in our diamond calculator
  • 3. Find out the carat weight of your diamond

If you have doubts about the information you currently have or you are missing this information about your diamond. Call our team with any questions you may have.

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Diamond Weight Calculator

Our Offices

New York

535 5th Avenue, 11th Floor,
New York, New York
10017, USA

London

Berkeley Square House
Berkeley Square, Mayfair
London, W1J 6BD, UK

Birmingham

212 JQ Modern
120 Vyse Street, Hockley
Birmingham, B18 6NF, UK