EER Calculator — Estimated Energy Requirement

Written by Great Medico

Updated September 24, 2026 •2 min read

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A useful nutrition estimate should be simple enough to apply and specific enough to understand. EER Calculator — Estimated Energy Requirement focuses on one calculation at a time.

What this calculator does

Estimated Energy Requirement, or EER, predicts the daily energy intake expected to maintain energy balance for a person with the entered characteristics and activity level. Nutrition equations are planning tools: real energy and nutrient needs still vary with physiology, goals, health conditions, and the quality of the input data.

How to use it

Enter or select Sex, Age, Height, Weight, and Activity level. Use the units offered by the calculator and keep measurements consistent when you plan to compare results over time.

How the calculation works

The calculator uses the sex-specific EER equations with age, height, weight, and the selected physical-activity coefficient. For males it uses 662 − 9.53 × age + PA × (15.91 × weight + 539.6 × height); for females it uses 354 − 6.91 × age + PA × (9.36 × weight + 726 × height), with metric units.

Example

For the sample values prefilled in this calculator, the primary result is 2900.9 kcal/day (Estimated energy requirement). This example is there to show how the inputs flow through the implemented equation; replace the sample values with your own measurements before using the result.

How to interpret the result

The output is an estimated daily calorie requirement. It can serve as a starting point for planning when body weight is relatively stable and the selected activity category fits reasonably well.

Limitations and notes

EER is a population prediction, not a metabolic-chamber measurement. Activity classification, body composition, pregnancy, illness, growth, and weight-change goals can make actual needs different from the estimate. For planning, compare the estimate with real-world trends over time instead of reacting to one day. Food-label accuracy, portion estimates, hydration, and activity can all create noise, so modest adjustments are usually more informative than chasing exact calculator precision.