Dog Food Calculator

The amount on the bag is just an average. Recalculate for your dog.

Daily portion
Daily energy need (DER)
Resting energy (RER)
Split into 2 meals
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How the portion is calculated

Vets calculate the Resting Energy Requirement as RER = 70 ร— body weight (kg) raised to the 0.75 power, then multiply by a factor based on age and spay/neuter status (DER). Dividing that energy by the food's calorie density gives the daily portion in grams.

More important than the number

The calculated value is a starting point. Check weight and rib coverage (body condition score) every two weeks and adjust in 10% steps. On days you give treats, reduce food by the treat calories โ€” treats should stay under 10% of daily energy.

The bag's recommended amount differs. Why?

Bag guidelines often assume an active, intact adult dog, so they can be too high. For spayed/neutered indoor dogs, the calculated value is usually closer to reality.

Where do I find my food's calorie content?

Look for the 'metabolizable energy (ME)' on the back of the bag, usually 330โ€“400 kcal per 100g. If listed per kg, divide by 10.

This result is for reference only. Consult your vet if your dog has a medical condition or is pregnant.