How many calories are in an energy drink?

A standard 8.4 fl oz can of regular energy drink has about 113 calories, and a 16 fl oz can has 216. Energy drinks average 45 calories per 100ml, essentially the same density as regular soda at 42, since both get nearly all their calories from sugar.

How much sugar is in an energy drink?

Regular energy drinks contain about 10.4g of sugar per 100ml, which means 26g in an 8.4 oz can and roughly 50g in a 16 oz can. That 16 oz can exceeds the American Heart Association's entire daily added sugar limit for women (25g) and nearly hits the men's limit (36g).

How many calories are in sugar-free energy drinks?

Sugar-free and zero versions typically run 0-15 calories per can, compared to 113 for a regular 8.4 oz can. They swap the 26g of sugar for artificial or non-nutritive sweeteners while keeping similar caffeine. For pure calorie purposes, they are close to water.

How much caffeine do energy drinks have?

It varies widely by brand. The USDA reference drink behind these numbers lists a modest 13mg per 100ml, about 33mg per 8.4 oz can, but popular brands label 80mg per 8.4 oz can and 160-300mg in larger formats. The FDA suggests healthy adults stay under 400mg of caffeine daily.

Are energy drinks keto-friendly?

Regular versions are not: an 8.4 oz can carries about 28g of carbs, exceeding a strict 20g daily keto limit in one serving. Sugar-free energy drinks contain close to 0g net carbs and are widely used on keto, though some people prefer to limit artificial sweeteners.

Do energy drinks cause weight gain?

Liquid sugar calories are easy to overlook. One 16 oz energy drink daily adds 216 calories, about 1,500 per week, without affecting hunger the way solid food does. Swapping it for a sugar-free version or black coffee at 2 calories per cup removes nearly all of that.

Energy drink vs coffee: which is better for energy?

Black coffee delivers comparable caffeine for 2 calories per 8 oz cup, versus 113 calories and 26g of sugar in an 8.4 oz energy drink. Energy drinks add taurine and B vitamins, but the evidence for benefits beyond the caffeine is thin. Calorie-wise, coffee wins decisively.

When should I drink an energy drink before a workout?

Caffeine peaks in the blood 30-60 minutes after drinking, so finishing a can about 45 minutes pre-workout times the peak with training. The 26g of fast sugar in a regular 8.4 oz can can actually help fuel hard sessions; for easy sessions, a sugar-free version avoids the extra 113 calories.

All Foods

Calories in Energy Drink

USDA Verified · FDC 174108 · Jun 2026

113 calories

per 8.4 fl oz can (250g)

Protein

11.3g

Carbs

Fat

Fiber

Per 100g as prepared

Log Energy Drink in one photo

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