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Convert Carats to Grams

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Measurement

Weight Converter
10 sig. figures
Formula1 ct × 0.2 = 0.2 g

About Weight Conversions

Global trade, healthcare, and science all depend on accurate mass. The kilogram became the SI base unit, redefined in 2019 against the Planck constant, yet pounds, ounces, and stones still run much of industry. Shipping shows the stakes: a wrong weight on a customs declaration or freight calculation brings fines or delays. Pharmacy and chemistry push the other way, where a milligram off changes a dose or a reaction's stoichiometry. The range below spans atomic mass units used in molecular chemistry up to metric tons used in bulk freight, every factor tied to the NIST Reference on Constants.

Quick Conversions

CaratsGrams
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
1000 ct200 g
Unit NameSymbolPer 1 Carat
Atomic Mass Unitu1.20443 × 10²³
Caratct1
Gramg0.2
Kilogramkg0.0002
Long Tonlong tn1.96841 × 10⁻⁷
Metric Tont2 × 10⁻⁷
Milligrammg200
Ounceoz0.00705479
Poundlb0.000440925
Short TonUS ton2.20462 × 10⁻⁷
Stonest0.0000314946

Frequently Asked Questions

How do I convert Carats to Grams?

To convert Carats to Grams, use the conversion where 1 Carat (ct) = 0.2 Grams (g). For example, 1 Carat = 0.2 Grams.

What are common Carat to Gram conversions?

Here are common conversions: 1 Carats = 0.2 Grams, 5 Carats = 1 Grams, 10 Carats = 2 Grams, 25 Carats = 5 Grams, 50 Carats = 10 Grams, 100 Carats = 20 Grams.

When would I need to convert Carats to Grams?

Weight conversions come up in international shipping, recipe scaling between metric and imperial measurements, fitness tracking across different gym equipment standards, and scientific research that needs precise mass measurements.

How precise are the conversions?

All conversions use exact factors verified against NIST and ISO standards with up to 10 significant figures of precision. Results are calculated using IEEE 754 double-precision arithmetic, which provides approximately 15-17 significant digits. For temperature and other non-linear conversions, exact formulas are used rather than approximations.

Sources

Read our full methodology →