How many micrograms is 1 carat?

1 carat equals exactly 200,000 micrograms. The metric carat is defined as 0.2 grams, and 1 gram equals 1,000,000 micrograms, so 0.2 × 1,000,000 = 200,000 µg.

What is a carat in grams?

1 carat (ct) = 0.2 grams (g). This is the metric carat used for gemstones and precious stones, not to be confused with karat (kt) which measures gold purity.

Can I convert fractions of a carat?

Yes. Enter any decimal value such as 0.5 or 2.75 and the tool will compute the exact microgram equivalent.

Is this the same carat used for gold?

No. The carat here is the unit of mass (1 ct = 0.2 g) used for gemstones. Gold purity is measured in karats (e.g. 24 kt = pure gold), which is a different scale.

Carats to Micrograms Converter

Convert carats to micrograms instantly. 1 carat = 200,000 micrograms.

Carats to Micrograms

Weight in Carats (ct)

1 carat = 200,000 micrograms

Enter a carat value to see the result

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Summary

Convert any weight in carats (ct) to micrograms (mcg / µg) using the exact factor of 200,000 micrograms per carat. Results update as you type.

How it works

Enter the weight in carats in the input field.
The tool multiplies your value by 200,000 (the exact ct-to-µg factor).
The result in micrograms appears instantly as you type.
Copy the result to your clipboard with one click.

Use cases

Gemologists verifying gemstone weights at the microgram scale.
Pharmacists or lab technicians working with trace substances measured in carats.
Jewellery manufacturers cross-checking unit conversions in specifications.
Students and educators verifying metric-unit relationships.

Frequently Asked Questions

Last updated: 2026-06-04 · Reviewed by Nham Vu