Food kcal formula
If you know the macros, calculate food calories by multiplying each macro by its calorie value and adding the results.
Total kcal = protein×4 + carbs×4 + fat×9 + alcohol×7
Step-by-step example
Example label: 25g protein, 40g carbs, and 12g fat.
- Protein: 25 × 4 = 100 kcal
- Carbs: 40 × 4 = 160 kcal
- Fat: 12 × 9 = 108 kcal
Total: 368 kcal per serving.
Accuracy tips
- Always check whether the label values are per serving or per 100g.
- Multiply by the number of servings you actually ate.
- Small rounding differences on labels are normal.
- For cooked meals, remember oils and sauces.
FAQ
What is the fastest way to calculate kcal in food?
Use the macro formula: protein×4 + carbs×4 + fat×9 + alcohol×7.
Why is my result different from the label?
Labels often round values and may use different serving sizes.
Can CaloriMate calculate this from a meal photo?
CaloriMate can estimate calories and nutrition from meal photos or descriptions, especially when you do not have a label.
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