Calculate calories in wine

Calories = [( %Abv × 7.9 × 7) + (g/l residual sugar × 4)] × (amount of wine in litres)

Example: 100ml of wine at 12%abv and 3 g/l residual sugar:

[(12.0 x 7.9 x 7) + (3 x 4)] * 0.100 litre = 67.56 Calories


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