Dark chocolate vs Milk chocolate

The short answer

Similar calories. Dark chocolate has more cocoa, so more fibre and iron and less sugar; milk chocolate is sweeter and softer, with more of its calories from sugar. Dark for the cocoa and less sugar, milk for the milder, sweeter taste. A square is a square either way.

Dark chocolate and Milk chocolate, per 100 g and per portion. A gap means USDA has no value for it — not zero.

Dark chocolate · per 100 gMilk chocolate · per 100 g
Calories550535
Protein5.1 g7.7 g
Fat32.2 g29.7 g
Carbs60 g59.4 g
Fiber7.2 g3.4 g
Sugars46.1 g51.5 g
Sodium23 mg79 mg
Vitamins & minerals — where both carry data
Calcium57 mg189 mg
Folate0 µg12 µg
Iron8.1 mg2.4 mg
Magnesium152 mg63 mg
Niacin0.7 mg0.4 mg
Phosphorus214 mg208 mg
Potassium568 mg372 mg
Riboflavin0.1 mg0.3 mg
Thiamin0 mg0.1 mg
Vitamin A2 µg59 µg
Vitamin B120.2 µg0.8 µg
Vitamin B60 mg0 mg
Vitamin C0 mg0 mg
Vitamin D0 µg0 µg
Vitamin E0.6 mg0.5 mg
Vitamin K8 µg5.7 µg
Zinc2.1 mg2.3 mg
At equal calories (per 100 kcal)
ProteinDark chocolate: 0.9 g, Milk chocolate: 1.4 g · FiberDark chocolate: 1.3 g, Milk chocolate: 0.6 g · SodiumDark chocolate: 4.2 mg, Milk chocolate: 14.8 mg

Generic USDA foods (not brands), so both carry micronutrients. Numbers are per 100 g unless the portion toggle is on. USDA FoodData Central, as of 2026-08-12.

Common questions
Is Dark chocolate or Milk chocolate better?

Neither is “better” on its own — it depends what you want from it. The table shows where each is higher; the short answer says when each one fits. Compare on the same basis (per 100 g) and pick for your dish and your goal.

How were these numbers worked out?

Straight from USDA FoodData Central for the generic form of each food, per 100 g. We show the portion view too, but portion sizes differ between foods, so per 100 g is the fair comparison.

Why does one column say “no data”?

Because USDA has no value for that nutrient in that food — so we leave it blank rather than print a 0 that would read as “none”. A real zero from USDA still shows as 0.