Dog Calorie Calculator

How many calories does my dog need?

A dog's daily energy requirement starts from its resting need — the calories it burns just staying alive — which is then scaled up for life stage and activity. This calculator uses the same two-step method vets use, and can turn the result into a daily cups figure if you know how many calories are in a cup of your food.

The formula

• RER (Resting Energy Requirement) = 70 × (body weight in kg)^0.75. The ¾ power reflects that bigger animals burn fewer calories per kilogram than smaller ones.
• MER (Maintenance Energy Requirement) = RER × a factor for the dog's situation — 1.6 for a neutered adult, 1.0 for weight loss, 2–3 for puppies and working dogs.

Example: a 40 lb (18 kg) neutered adult has an RER of about 612 kcal, so roughly 980 kcal a day at the 1.6 factor.

Turning calories into food

Pet-food labels list the calorie content as "kcal/cup" (or per can). Divide your dog's daily calories by that number to get how much to feed. Always check your specific bag — calorie density varies a lot between brands and formulas, so two cups of one food isn't the same as two of another.

Important caveats

• This is an estimate, not a prescription. Individual dogs vary with metabolism, breed, and health.
• Monitor body condition — you should feel the ribs easily and see a waist. Adjust portions up or down based on what you see over a few weeks.
• Ask your vet for dogs that are pregnant, nursing, ill, or on a prescription diet — their needs differ from these general figures.

FAQ

Should treats count?

Yes. Treats should stay under about 10% of daily calories; subtract them from the meal portion so your dog doesn't quietly gain weight.

How often should I feed?

Most adult dogs do well on two meals a day; puppies need three or four smaller meals. Split the daily amount across those meals.

Can I enter my dog's weight in pounds?

Yes. The formula uses kilograms internally (RER = 70 × kg^0.75), but the calculator converts from pounds for you, so you can enter whichever unit your scale uses.

Is this a substitute for veterinary advice?

No. It gives a general estimate based on standard resting and maintenance energy formulas. Pregnant, nursing, ill, senior, or prescription-diet dogs have different needs, so confirm portions with your vet and adjust based on your dog's body condition over a few weeks.

Is the tool free and private?

Yes. It is free with no sign-up, and the calculation runs entirely in your browser, so your dog's details are never uploaded anywhere.

Does it work on my phone?

Yes. The calculator is responsive and works in any mobile browser, handy for checking portions at the pet store or food aisle.