Nutrition & nutritional science
Calculation method and formula
Calories [kcal] ÷ Food weight [g] × 100
Understand the inputs
- Calories
- Unit: kcal. Minimum 0. Use a measured value or your own assumption.
- Food weight
- Unit: g. Minimum 1. Use a measured value or your own assumption.
Assumptions and limitations
Nutrient quantity and energy must refer to the same serving. Do not combine per-100-g quantities with a whole pack's calories; one ratio does not rate the food overall.
The formula uses the specified units. Displayed numbers are rounded; whole packs, item counts and full time periods may also be rounded within the calculation.