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Updated Sep 02, 2025

Overview of Resting Energy Requirement (RER) and activity multipliers (MER).

RER

RER = 70 × (body weight in kg)^0.75.

MER

We apply typical multipliers by species, life stage, and activity (dogs ≈ 1.2–3.0; cats ≈ 1.0–2.5).

Conversions

We convert calories to cups (using kcal/cup) or grams (using kcal/100g). Results depend on your food’s label values.