What is calorie density?

Calorie density is the amount of energy in a given weight of food, often shown as calories per gram or calories per 100 g.

How do I calculate calories per 100 g?

Divide total calories by total food weight in grams, then multiply by 100.

Should I use raw or cooked weight?

Use the weight basis that matches your calorie data. For homemade recipes, many people total raw ingredients and then use final cooked yield for the per-100 g value.

Calorie Density Calculator

Convert total recipe calories, food weight and serving size into calories per 100 g, calories per gram and calories per serving.

Total food weight, g

Total calories, kcal

Calories per 100 g

173

kcal

Calorie density

Moderate

Moderate-density comparison band

Calorie density scale per 100 g

This is a visual comparison aid for calorie density, not a medical or official food-quality classification.

173 kcal

040100200350600+

Calories in common serving weights

30 g

kcal

50 g

kcal

100 g

173

kcal

150 g

260

kcal

200 g

347

kcal

250 g

433

kcal

300 g

520

kcal

Calculation basis: Use one data basis for one calculation: cooked weight with cooked-food calories, or raw weight with raw-food data. Cooking changes food weight, so mixed raw/cooked inputs can skew the result.

Calculate calories per 100 g and per serving

English intent for this page is calorie density: users already know calories, weight or label calories per 100 g and need to convert that value into a serving, a full recipe or a consistent comparison unit.

K_{100} = \frac{K _{t o t a l}}{m _{f oo d}} \times 100

K100 - calories per 100 g, Ktotal - total calories, mfood - food weight in grams.

K_{g r am} = \frac{K _{100}}{100}

Kgram - calories per gram.

K_{ser v in g} = K_{g r am} \times m_{ser v in g}

Kserving - calories in the selected serving weight.

Use one weight basis

Use cooked weight with cooked-food calories when logging a finished recipe.
Use label calories per 100 g when converting a packaged food portion.
Use the final cooked yield for homemade foods because water loss or gain changes calories per 100 g.
The density band is a comparison aid, not a medical food rating.

Nutrition values are estimates. Labels, food databases, cooking loss and serving size rounding can change the actual calories eaten.

Frequently Asked Questions

Sources and References

Calculations are based on the listed reference sources. Links open in a new tab.

Updated: June 2, 2026

Related Tools

Recipe Calorie Calculator

Calculate recipe calories from ingredients by weight, with totals for the whole recipe, per serving and per 100 g finished weight.

Open

Recipe Macro Calculator

Calculate recipe macros from ingredients: protein, fat, carbs and calories for a full homemade recipe, then compare the macro split with target profiles.

Open

Calorie Calculator

Estimate daily calorie needs from BMR, TDEE, activity level and goal, then review maintenance, weight-loss, weight-gain and macro targets.

Open

Cooking Measurement Converter

Convert cups, tablespoons, teaspoons, milliliters, fluid ounces and grams for recipes using ingredient density and common kitchen measures.

Open