Nutrition Lookup Calculator

Scale the calories of a common food from per-100g values to your portion size.

Usage Tip

Check the actual label when you have one – brands and preparations vary.

Calories
— kcal
For your portion
THE MATH
calories = portion (g) ÷ 100 × calories per 100 g
Per-100g values are approximate, typical figures for each food.
Cooking method and cut change real calorie values; treat these as estimates.
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The calculators and tools on Formula Factory are provided for general guidance and informational purposes only. Results are estimates based on standard formulas and the values you enter — they do not constitute professional engineering, electrical, or architectural advice. Always verify calculations with a qualified professional before making decisions for any safety-critical, code-compliance, or commercial application. Formula Factory makes no representations or warranties as to the accuracy or completeness of any result, and accepts no liability for errors, omissions, or any outcomes arising from reliance on this information.