How this calculator works
Choose an adult activity group to estimate daily metabolisable energy. Working dogs receive a range. Portion mode divides by the package energy density. Analysis mode uses the four-step prediction for prepared dog food with all nutrients on the same as-fed basis. Guaranteed minima and maxima are not an exact analysis. High-fibre foods can fall outside the useful prediction range.
Formula
Daily kcal = activity factor × kg^0.75; factors 95, 110, 125 or 150 to 175. Food kg = kcal / kcal per kg. NFE = dry matter - protein - fat - fibre - ash. GE = 5.7P + 9.4F + 4.1(NFE + fibre). Digestibility = (91.2 - 1.43 × fibre percent of dry matter)/100. ME per 100 g = GE × digestibility - 1.04P.
Worked example
At 16 kg, metabolic weight is 8. Low activity gives 95 × 8 = 760 kcal/day. Food providing 4,000 kcal/kg supplies this in 190 g/day, or 1.33 kg over seven days.
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Frequently asked questions
Does this apply to puppies or pregnancy?
No. Growth and reproduction need a separate feeding assessment.
Where do I find food energy?
Prefer the manufacturer's kcal/kg as-fed value. Analysis mode is a prediction when measured energy is unavailable.
Can I reverse the energy equation?
Weight mode calculates the mathematical weight implied by a calorie amount. It is not a target-weight recommendation.