Carats to Micrograms Converter
Enter the weight in carats below to convert it to micrograms.
Convert Carats to Micrograms
Enter a value in carats (ct) to convert to micrograms (µg).
Metric Carat to Microgram Conversion Table
Table showing various metric carat measurements converted to micrograms. Click any preset value or arrow to load it into the converter.
How to Convert Carats to Micrograms
To convert carats to micrograms, multiply the weight by the following conversion ratio: 200,000 micrograms/metric carat.
Since one metric carat is equal to 200,000 micrograms, you can use this simple formula to convert:
The weight in micrograms is equal to the weight in carats multiplied by 200,000.
For example, here's how to convert 5 carats to micrograms using the formula above.
How Many Micrograms Are in a Metric Carat?
There are 200,000 micrograms in a metric carat, which is why we use this value in the formula above.
Our metric carat to microgram calculator automatically converts your weight measurements with full decimal and scientific precision across US customary, imperial, and SI metric standards.
Carats and micrograms are both units used to measure weight. Keep reading to learn more about each unit.
What Is a Metric Carat?
A metric carat is a unit of weight equal to 1/5,000 of a kilogram (0.0002 kg). Gemstone mass unit equal to 0.2 grams (200 mg). [1]
The metric carat is classified as a metric and SI-compatible unit of weight. Carats can be abbreviated as ct; for example, 1 metric carat can be written as 1 ct.
When working with carats (ct) in formulas or technical specifications, always verify whether your target system uses SI metric, US customary, or British imperial standards.
In practice, carats (ct) are widely used across fine-tolerance laboratory, analytical, and micro-scale weight measurements within SI metric workflows, engineering documentation, and technical data sheets.
What Is a Microgram?
A microgram is a unit of weight equal to 1/1,000,000,000 of a kilogram (1e-9 kg). One-millionth of a gram (10⁻⁹ kg). [2]
The microgram is classified as a metric and SI-compatible unit of weight. Micrograms can be abbreviated as µg; for example, 1 microgram can be written as 1 µg.
In the metric system, "micro" is the standard SI prefix for millionths, or 10⁻⁶. This makes the microgram (µg) a convenient decimal multiple of the gram (g).
In practice, micrograms (µg) are widely used across fine-tolerance laboratory, analytical, and micro-scale weight measurements within SI metric workflows, engineering documentation, and technical data sheets.
When converting weight between carats (ct) and micrograms (µg), keep full floating-point precision (1 ct = 200,000 µg; 1 µg = 0.000005 ct) during intermediate calculations and round only the final microgram figure to match your instrument tolerance.
More Carat & Microgram Conversions
Need to calculate in the opposite direction? Use our micrograms to carats calculator to switch your starting unit immediately. You can also explore related tools such as converting micrograms to carats, converting milligrams to micrograms, or converting carats to grams.
Convert from Carats
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Frequently Asked Questions
References
- [1]NIST OWM StandardNIST OWM (SI Units — Mass)·Mass & Weight Metrology Standard — Carats (ct) to Micrograms (µg)
- [2]NIST HB 44 SpecificationNIST HB 44 (NIST Handbook 44 (Current Ed.))·Unit Specifications: Metric Carat (ct) & Microgram (µg)
- [3]BIPM ReferenceBIPM (SI Base Unit: Kilogram (kg))·Conversion Factors & Mathematical Basis (ct to µg)