grams to carats | Exact Decimal + Stone/Pounds

1 Gram = 5 Carat

One gram equals exactly 5 carats — a fixed ratio you can memorize. Real-world use: nutrition labels, jewelry, cooking ingredient weights, and postal rates for small items. This page expresses those values in carats, which is used for diamonds and other precious stones; a 1-carat diamond weighs 200 milligrams. Use the calculator above, then check the reference table for common values from 0.001 to 1000.

About Gram and Carat

Gram (g)

A gram is one-thousandth of a kilogram, about the weight of a paperclip.

Where it's used: Nutrition labels, jewelry, cooking ingredient weights, and postal rates for small items.

Carat (ct)

A carat is exactly 0.2 grams, the standard unit for gemstone weight.

Where it's used: Diamonds and other precious stones; a 1-carat diamond weighs 200 milligrams.

Weight & Mass Converter

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Precision

Formula

ct = g × 5

To convert Gram to Carat, use the formula displayed above.

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Gram to Carat: Quick Reference Table

Gram	Carat (Decimal)	Fraction	Real-world equivalent
0.001 g	0.005 ct	-	fractional unit measurement
0.01 g	0.05 ct	3/64 ct	fractional unit measurement
0.1 g	0.5 ct	1/2 ct	fractional unit measurement
0.5 g	2.5 ct	2 1/2 ct	standard single unit scale
1 g	5 ct	-	standard single unit scale
2 g	10 ct	-	multiple unit increments
5 g	25 ct	-	multiple unit increments
10 g	50 ct	-	multiple unit increments
25 g	125 ct	-	multiple unit increments
50 g	250 ct	-	multiple unit increments
100 g	500 ct	-	multiple unit increments
250 g	1250 ct	-	multiple unit increments
500 g	2500 ct	-	multiple unit increments
1000 g	5000 ct	-	multiple unit increments

g to ct Formula and Examples

Direct Formula ct = g × 5

Inverse Formula g = ct × 0.2

Mental Math Shortcut

Multiply the value by roughly 5 to calculate the equivalent amount in your head.

Common Gram to Carat Calculations

5 g = 25 ct
10 g = 50 ct
50 g = 250 ct
100 g = 500 ct
500 g = 2500 ct

Precision & Practical Use

For example, 10 g = 50 ct — roughly multiple unit increments.

Kitchen scales typically resolve to 1 gram or 0.1 oz, while lab and industrial scales go further. Round the converted result to the smallest unit your scale can actually display.

Related Specialist Weight & Mass Calculators & Niche Tools

Standard weight and mass units like kilograms, pounds, grams, and ounces are used globally, but specific industries like culinary baking, metallurgy, and construction logistics demand much more detailed density and structural load conversions.

In culinary arts, baking success relies on converting ingredient weight (grams) from volume (cups, tablespoons) because packing density differs between flour, butter, and white sugar. In heavy fabrication, steel weight calculators estimate raw beam or plate weights based on linear dimensions and metal grades, while rebar calculators determine structural reinforcement loading. For land developers, gravel weight calculators convert volume in cubic yards into tons to estimate hauling weights. Using these specialized weight calculators prevents structural calculation errors and material shipping underestimations.

Flour Cups to Grams Convert baking flour cups to grams. Butter Cups to Grams Convert baking butter cups to grams. Pounds & Ounces to kg Convert compound weight measurements. Steel Weight Calc Estimate steel bar or plate weights. Rebar Weight Calc Calculate rebar linear weights and sizing. Gravel Weight Tons/Yards Convert gravel volume to tons weight.

How to Convert Gram to Carat

How many carats are in one gram?

One Gram (g) equals 5 Carat (ct). To convert grams to carats, multiply the gram value by 5.

How do I convert Gram to Carat?

Multiply your gram value by 5 to get the result in Carat: ct = g × 5. For example, 5 g = 25 ct.

What is the formula for converting g to ct?

The conversion formula is ct = g × 5. Use the calculator above for any value, and see the reference table below for common inputs from 0.001 to 1000.

Is there a quick mental estimate for g to ct?