8 Best Free Online Diamond Weight Calculator Websites

Here is a list of best free online diamond weight calculator websites. Diamond weight signifies the actual weight of a diamond and is mainly expressed in carats. One carat is equal to 0.2 grams. It is important to know the exact weight of a diamond to evaluate its actual price. There are many factors apart from weight that affect the diamond price like cut, color, clarity, size, etc. If you want to calculate the weight of a diamond, then check out these online diamond weight calculator websites.

These websites mainly use diamond shapes (Round Brilliant Cut, Princess Cut, Emerald Cut, Pear Cut, Marquise Cut, and more.) and dimensions (length, width, depth, etc.) to evaluate its weight. Some websites also use Girdle Thickness and Correction Factor values along with diamond shape and dimension for precise diamond weight calculation. A few websites also show the diamond shape diagrams with highlighted diamond parameters. Plus, formulas to calculate diamond weight are also provided. To help new users, I have included the necessary calculation steps in the description of each website.

These websites also offer tools like diamond inventory, pay raise calculator, stock calculator, math calculators, statistics calculators, etc. Go through the list to learn more about these websites.

My Favorite Online Diamond Weight Calculator Website:

omnicalculator.com is my favorite website as it offers diamond weight calculation steps and formulas to calculate it. Plus, it also considers Girdle Thickness and Correction Factor values in the calculation.

You can also check out lists of best free Online Volumetric Weight Calculator, Online Metal Weight Calculator, and Online Tire Pressure Calculator websites.

Comparison Table:

Features/Website Names	Provides diamond weight calculation steps	Shows calculation formula	Include Grindle Thickness and Correction Factor in calculation
omnicalculator.com	✓	✓	✓
goodcalculators.com	✓	✓	✓
bluestone-trading.com	x	x	x
peternorman.com	x	x	x
vcalc.com	x	✓	x (only Gringle Thickness)
shiningstardiamonds.com	x	x	x
diamond-reports.com	x	x	x
easycalculation.com	x	✓	x

omnicalculator.com

omnicalculator.com is a free online diamond weight calculator website. Using this website, users can calculate the estimated diamond weight in carats using diamond shape, diamond dimensions, and adjustment values (girdle thickness and correction factor). It also explains the carat and various shapes of diamonds. Plus, steps to calculate diamond weight are also provided. It also shows the formula that it uses to calculate diamond weight. Now, follow the below steps.

How to calculate diamond weight online using omnicalculator.com:

Go to this website and access the Diamond Weight Calculator.
After that, specify a diamond shape (Asscher, cushion, emerald, round, etc.).
Now, enter diamond dimensions (length, width, and depth).
Next, specify the Girdle Thickness and Correction Factor values.
Finally, view the calculated diamond weight in carats.

Additional Features:

This website offers multiple Chemistry, Finance, Math, Physics, Statistics, and Sports calculators.

Final Thoughts:

It is one of the best free online diamond weight calculator websites that also provides calculation steps.

Pros	Cons
Shows calculation steps
Explains diamond weight
Shows calculation formula

Home Page

goodcalculators.com

goodcalculators.com is another free online diamond weight calculator website. This website not only calculates diamond weight but also shows the formulas to calculate weight for different diamond shapes. Plus, steps to use this calculator are also provided. This website also takes Girdle Thickness and Corrections percentage values into account when calculating the diamond weight. Now, follow the below steps.

How to calculate diamond weight online using goodcalculators.com:

Visit this website using the given link.
After that, specify the diamond shape and its dimensions.
Now, enter Gridle Thickness and Corrections percentage values.
Finally, click on the Calculate button to view the diamond weight in carats.

Additional Features:

This website has multiple online calculators like car depreciation, CA disability, pay raise, stock, ratio, earned income, and more.

Final Thoughts:

It is another good online diamond weight calculator website that also shows diamond weight calculation formulas for each diamond shape.

Pros	Cons
Shows calculation formulas
Provides steps of calculation

Home Page

bluestone-trading.com

bluestone-trading.com is another free online diamond weight calculator website. This website offers a simple diamond-weight calculator that helps users find out the weight of the diamond in carats. To do that, it mainly uses the diamond shape (Round, Oval, Heart, Emerald, Radiant, etc.) and diamond dimensions (length, width, and depth in mm). After the calculation, it shows the diamond weight in the carat unit. Now, follow the below steps.

How to calculate diamond weight online using bluestone-trading.com:

Visit this website and open up the Diamond Weight Calculator.
Now, choose a diamond shape from the available ones.
Next, specify the diamond dimensions.
Finally, view the calculated diamond weight in carats.

Additional Features:

This website also helps users sell their diamonds.
It also offers a diamond inventory that users can browse.

Final Thoughts:

It is another good online diamond weight calculator website that calculates the weight of a diamond using its dimensions and shape.

Pros	Cons
Uses the diamond shape and dimensions to calculate its weight

Home Page

peternorman.com

peternorman.com is another free online diamond weight calculator website. It is another good website that helps users calculate the diamond’s weight using its shape and dimensions. Some of the shapes that it supports are Round, Oval, Heart, Trillion, Princess, Emerald, and more. It also highlights the different parameters of a diamond using a diamond diagram. Now, follow the below steps.

How to calculate diamond weight online using peternorman.com:

Go to this website and access the Diamond Weight Calculator Los Angeles.
After that, specify a diamond shape.
Now, enter diamon dimensions like widest points, narrowest points, and depth.
Finally, click on the Calculate Weight button to view the diamond weight in carats.

Additional Features:

On this website, users can also browse and purchase various types of jewelry.

Final Thoughts:

It is another simple-to-use online diamond weight calculator website that anyone can use to calculate diamond weight in carats.

Pros	Cons
Uses the diamond shape and dimensions to perform the calculation
Highlights diamond parameters

Home Page

vcalc.com

vcalc.com is another free online diamond weight calculator website. This website has a simple diamond-carat weight calculator that uses the diamond shape (heart, round, old European, cushion, etc,), diamond dimensions, and girdle thickness values to calculate diamond weight. It also highlights the formula that it uses to calculate the diamond weight. An accuracy comparison table is also provided. Now, follow the below steps.

How to calculate diamond weight online using vcalc.com:

Go to this website and open up the Diamond Carat Weight calculator.
After that, choose a diamond shape from the available ones.
Now, enter dimension and thickness values.
Finally, view the calculated diamond weight in carats, grain, pennyweight, etc., units.

Additional Features:

This website offers multiple online calculators, equations, and datasets.

Final Thoughts:

It is another good online diamond website calculator website that anyone can use to find out the diamond’s weight.

Pros	Cons
Shows calculation formula
Provides accuracy comparison table

Home Page

shiningstardiamonds.com

shiningstardiamonds.com is another free online diamond weight calculator website. Unlike other websites, it can only calculate the weight of round melee diamonds. To perform the calculation, it mainly needs the round melee diamond diameter value and number of diamond pieces. After the calculation, it shows the diamond weight in carats. Now, follow the below steps.

How to calculate diamond weight online using shiningstardiamonds.com:

Go to this website using the given link.
After that, enter the round melee diamond diameter.
Next, enter the number of diamond pieces.
Finally, view the calculated diamond weight in carats.

Final Thoughts:

It is a good online diamond weight calculator website that can calculate the weight of round melee diamonds.

Pros	Cons
	Only calculates the weight of round melee diamonds
	Lacks information related to diamond weight calculation

Home Page

diamond-reports.com

diamond-reports.com is another free online diamond weight calculator website. This website can calculate the diamond weight of various shapes like Emerald Cut, Princess Cut, Pear Shape, Radiant, Cushion Shape, Heart Shape, Trillion, and more. It also shows a diagram of diamonds highlighting their dimensions. After performing the calculation, it shows the estimated diamond weight, maximum diamond weight, and maximum diamond shape. However, it lacks information related to diamond weight calculation. Now, follow the below steps.

How to calculate diamond weight online using diamond-reports.com:

Launch this website and access the diamond weight calculator.
After that, choose a diamond shape from the available ones.
Now, enter the diamond dimensions (length, width, and depth) in mm.
In the end, hit the Calculate button to view the estimated diamond weight in carats.

Additional Features:

This website offers reports of various types of stones and diamonds like loose diamonds, loose gemstones, Jewellery, laboratory-grown, etc.

Final Thoughts:

It is another good online diamond weight calculator website that anyone can use without much hassle.

Pros	Cons
shows diamond shape illustrations	Lacks information related to diamond weight calculation

Home Page

easycalculation.com

easycalculation.com is the last free online diamond weight calculator website. This website offers multiple online calculators including a diamond weight calculator. This calculator uses the diamond shape (round brilliant, prince cut, oval, pear, etc.) and dimensions to calculate its weight. It also shows all the formulas to calculate the weight of diamonds of various shapes. Now, check out the below steps.

How to calculate diamond weight online using easycalculation.com:

Launch this website and open up the Diamond weight calculator.
After that, choose a diamond shape from the Shapes menu.
Now, enter diamond diameter and depth values.
Finally, click on the Calculate button to view the diamond weight.

Additional Features:

This website has many online tools like Age Calculator, Derivative Calculator, Compound Interest Calculator, Pregnancy Calculator, and more.

Final Thoughts:

It is another good online diamond weight calculator website that offers all the tools to calculate the weight of diamonds of various shapes and dimensions.

Pros	Cons
Shows calculation formulas

Home Page

Frequently Asked Questions

What is diamond weight in points?

Diamond weight in points is a way to express the weight of a diamond that is less than one carat. Instead of using decimal fractions of a carat, jewelers and the diamond industry often use "points" to describe smaller diamond weights. There are 100 points in one carat. So, if a diamond is referred to as having a weight of 50 points, it means the diamond weighs 0.50 carats or half a carat.

How many mm is a 1 carat diamond?

The size of a 1-carat diamond can vary depending on its shape and the specific dimensions of the individual stone. However, as a general guideline, a round brilliant-cut 1-carat diamond typically has a diameter of approximately 6.5 to 6.7 millimeters. Keep in mind that other diamond shapes may have different dimensions for a 1-carat stone. For example, a 1-carat emerald-cut diamond may have different length and width dimensions compared to a 1-carat round brilliant-cut diamond. If you're looking for a specific size for a diamond in a non-round shape, it's best to consult with a jeweler to determine the appropriate dimensions.

Which carat diamond is best?

The "best" carat for a diamond is subjective and depends on your personal preferences, needs, and budget. When considering the carat weight of a diamond, it's essential to balance it with the other characteristics, often referred to as the "Four Cs," which are cut, color, and clarity.

Do diamonds go by weight?

Yes, diamonds are typically sold and priced based on their weight, which is measured in carats. The carat is the standard unit of measurement for a diamond's weight. One carat is equivalent to 200 milligrams or 0.2 grams. Diamonds come in a range of carat weights, from less than one carat to several carats, and the weight of a diamond is a crucial factor in determining its value.

Is carat a weight or purity?

Carat is a unit of measurement used to express the weight of a diamond or other gemstones. It is not related to the purity of the diamond but specifically refers to its weight. One carat is equivalent to 200 milligrams or 0.2 grams. The term "carat" comes from the use of carob tree seeds, which were historically used as a reference for weighing gemstones due to their uniform size. The purity or quality of a diamond, on the other hand, is typically assessed using the "Four Cs" grading system: Carat Weight, Cut, Color, and Clarity.

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