Question: how many calories in a glass of gin and slimline tonic?
Answer: A similar 210ml serving of gin & slimline tonic contains just 115 calories, saving you an average of 55 calories per glass. Swap a sweet white wine (160 calories) for a glass of Champagne (89 calories). The additional sugar in a sweet white wine means that a 175ml medium glass can average about 160 calories.