4 kcal
Both carbohydrates and protein have four calories per gram, whereas fats have nine.
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There are 4 calories in 1g of carbohydrates.
There is only 1 gram in one gram - whatever material you have.
Since 1,000 milligrams is one gram. One third of a gram is 333 milligrams.
There are 1000 milligrams in a gram.
There are 1000 mg in one gram.