A metric carat is exactly 200 milligrams.
Carats to Grains
Convert carats (ct) to grains (gr) instantly. Free online weight converter with formulas, tables and examples.
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A grain is exactly 64.79891 milligrams.
gr = ct × 3.08647167059
Results update instantly for Carats to Grains conversions.
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Formula
gr = ct × 3.08647167059
ct = gr ÷ 3.08647167059
Conversion table
| 1 ct | 3.086472 gr |
| 5 ct | 15.432358 gr |
| 10 ct | 30.864717 gr |
| 20 ct | 61.729433 gr |
| 50 ct | 154.323584 gr |
| 100 ct | 308.647167 gr |
| 500 ct | 1543.235835 gr |
| 1000 ct | 3086.471671 gr |
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Frequently asked questions
What is the source unit in this conversion?
The source unit is the carat (ct). A metric carat is exactly 200 milligrams.
What is the destination unit in this conversion?
The destination unit is the grain (gr). A grain is exactly 64.79891 milligrams.
How do I convert carats to grains?
Multiply the number of carats by 3.08647167059 to get the equivalent value in grains. For example, 5 ct × 3.08647167059 = 15.432358 gr.
Is the carat to grain conversion exact?
Yes. This converter uses a fixed factor of 3.08647167059, so results are precise and consistent every time you use it.
Where is this conversion commonly used?
It's used in everyday measurement, shipping and logistics, scientific and industrial work, and any context where you need to switch between carat and grain values.
Can I convert grains back to carats?
Yes. Multiply the grains value by 0.32399455, or divide it by 3.08647167059, to convert back to carats.
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About this conversion
This page converts carats (ct) into grains (gr) using the Universal Converter's mass conversion engine.
Carat-to-Grain conversions are useful for everyday calculations, scientific work, shipping, and any task that mixes different weight or mass units.
The formula is gr = ct × 3.08647167059, based on the standard definitions of carat and grain.
Because the conversion factor is fixed, results stay consistent and repeatable no matter how many times you calculate them.
Carat: A metric carat is exactly 200 milligrams. Grain: A grain is exactly 64.79891 milligrams.