Carats to Grams Converter

Convert carats to grams instantly. Free carat to gram converter with quick reference table and formula. 1 carat = 0.2 grams. Used for gemstones and diamonds.

0.2
Gram (g)
Input Value
1 ct (Carat)
Carat = 0.2 g. International standard for diamonds and gems.

How to Convert Carat to Gram

Simple formula with a worked example

To convert carat (ct) to gram (g), use this formula:

g = carats × 0.2

Example: Convert 3 ct to g

3 ct = 0.6 g

To convert back, use: carats = g ÷ 0.2

Carat to Gram Conversion Table

Quick reference for common carat to gram conversions

Carat (ct)Gram (g)
1 ct0.2 g
2 ct0.4 g
5 ct1 g
10 ct2 g
25 ct5 g
50 ct10 g
100 ct20 g
250 ct50 g
500 ct100 g
1,000 ct200 g

About Carat and Gram

Understanding these weight units

Carat (ct)

Carat = 0.2 g. International standard for diamonds and gems.

Gram (g)

1/1000 of a kilogram. Common for food, cooking, and small items.

When You Need This Conversion

  • diamond shopping
  • gemstone valuation
  • jewelry design
  • gem trading

Did you know? The word 'carat' comes from the carob seed, which was historically used as a balance weight due to its remarkably consistent mass of about 0.2 grams.

Frequently Asked Questions

Common questions about converting carat to gram

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Last updated Mar 21, 2026