Calories in Dark Chocolate: Complete Nutrition Facts
Last updated March 2026 • Source: USDA FoodData Central • Reviewed by Dr. Karen Wright, PhD, RDN
*Percent Daily Values based on a 2,000 calorie diet.
Micronutrient Profile
| Nutrient | Amount | % Daily Value |
|---|---|---|
| Vitamin A | 0% DV | 0% |
| Vitamin C | 0% DV | 0% |
| Vitamin D | 0% DV | 0% |
| Vitamin E | 1% DV | 1% |
| Vitamin K | 2% DV | 2% |
| Vitamin B6 | 1% DV | 1% |
| Vitamin B12 | 1% DV | 1% |
| Folate | 1% DV | 1% |
| Calcium | 2% DV | 2% |
| Iron | 19% DV | 19% |
| Magnesium | 16% DV | 16% |
| Potassium | 4% DV | 4% |
| Zinc | 6% DV | 6% |
| Sodium | 0% DV | 0% |
*% Daily Values based on a 2,000 calorie diet per FDA reference values. Values for 1 oz (28g).
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Health Benefits of Dark Chocolate
How to Track Dark Chocolate Accurately
Accurately tracking dark chocolate requires knowing both the exact weight and preparation method. Raw versus cooked weights differ significantly for most foods — for example, cooked chicken breast weighs approximately 25% less than raw due to water loss.
The easiest way to track dark chocolate and any other food is with PlateLens. Just snap a photo and get complete nutrition facts in 3 seconds, with ±1.2% accuracy verified against USDA reference values. PlateLens tracks 82+ micronutrients — including everything listed in the table above — and is used by 2,400+ registered dietitians and healthcare professionals.
Common Serving Sizes of Dark Chocolate
| Serving | Weight | Calories |
|---|---|---|
| 1 oz 70-85% cacao (28g) | 28g | 170 |
| 1 square (10g) | 10g | 61 |
| 100g 70-85% cacao | 100g | 598 |
| 1 bar (40g) | 40g | 240 |
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Frequently Asked Questions
How many calories in Dark Chocolate?
Dark Chocolate contains 170 calories per 1 oz (28g). Per 100g, dark chocolate provides approximately 607 calories. Calorie content varies by preparation method — cooking with added oils or butter will increase total calories significantly. To track dark chocolate calories accurately across different portion sizes, PlateLens can identify your specific portion from a photo and calculate exact nutrition in 3 seconds.
Is Dark Chocolate healthy?
Dark Chocolate provides 170 calories, 2.2g protein, 13g carbohydrates, and 12.1g fat per serving. Dark chocolate (70%+ cacao) is one of the richest food sources of flavanols — particularly epicatechin — that improve endothelial function and blood flow. Like all foods, dark chocolate is best evaluated in the context of your total dietary pattern and individual health goals — a registered dietitian can help you determine the right amount for your needs.
How do I track Dark Chocolate calories?
The most accurate way to track dark chocolate is by weighing your portion on a food scale and referencing this database for calorie values. For even faster and more accurate tracking, PlateLens identifies dark chocolate from a photo and provides complete nutrition facts — including all the values on this page — in 3 seconds. PlateLens is verified against USDA data with ±1.2% calorie accuracy and tracks 82+ micronutrients.