Grams to Carats Converter
Enter the weight in grams below to convert it to carats.
Convert Grams to Carats
Enter a value in grams (g) to convert to carats (ct).
Gram to Metric Carat Conversion Table
Table showing various gram measurements converted to carats. Click any preset value or arrow to load it into the converter.
How to Convert Grams to Carats
To convert grams to carats, multiply the weight by the following conversion ratio: 5 carats/gram.
Since one gram is equal to 5 carats, you can use this simple formula to convert:
The weight in carats is equal to the weight in grams multiplied by 5.
For example, here's how to convert 5 grams to carats using the formula above.
How Many Carats Are in a Gram?
There are 5 carats in a gram, which is why we use this value in the formula above.
Our gram to metric carat calculator automatically converts your weight measurements with full decimal and scientific precision across US customary, imperial, and SI metric standards.
Grams and carats are both units used to measure weight. Keep reading to learn more about each unit.
What Is a Gram?
A gram is a unit of weight equal to 1/1,000 of a kilogram (0.001 kg). Metric unit equal to one-thousandth of a kilogram (0.001 kg). [1]
The gram is classified as a metric and SI-compatible unit of weight. Grams can be abbreviated as g; for example, 1 gram can be written as 1 g.
When working with grams (g) in formulas or technical specifications, always verify whether your target system uses SI metric, US customary, or British imperial standards.
In practice, grams (g) 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 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). [2]
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.
When converting weight between grams (g) and carats (ct), keep full floating-point precision (1 g = 5 ct; 1 ct = 0.2 g) during intermediate calculations and round only the final metric carat figure to match your instrument tolerance.
More Gram & Carat Conversions
Need to calculate in the opposite direction? Use our carats to grams converter (ct to g) to switch your starting unit immediately. You can also explore related tools such as converting grams to ounces, converting grams to kilograms, or converting kilograms to pounds.
Convert from Grams
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Frequently Asked Questions
References
- [1]NIST OWM StandardNIST OWM (SI Units — Mass)·Mass & Weight Metrology Standard — Grams (g) to Carats (ct)
- [2]NIST HB 44 SpecificationNIST HB 44 (NIST Handbook 44 (Current Ed.))·Unit Specifications: Gram (g) & Metric Carat (ct)
- [3]BIPM ReferenceBIPM (SI Base Unit: Kilogram (kg))·Conversion Factors & Mathematical Basis (g to ct)