Dog Calorie Calculator (Daily Calories)
Enter your dog's weight and life stage to estimate the calories they need each day — and how many cups of food that works out to.
An estimate — real needs vary with metabolism and breed. Find the kcal/cup on your food bag; keep treats under ~10% of daily calories.
Estimate only — not veterinary advice. Every animal is different; for a medication dose, a possible poisoning, or any emergency, call your veterinarian or an animal poison control line right away.
The formula vets use
Daily calories come from two numbers: the resting energy requirement (RER), which is what a dog burns at rest, and a multiplierfor life stage and activity. RER scales with body weight to the power of 0.75, which is why a dog twice as heavy doesn't need twice the food. The calculator does the math and converts the result into cups once you enter your food's calories per cup.
Use it as a starting point
Treat the number as a sensible starting ration, then adjust based on the scale and the rib test over a few weeks. If your dog is gaining, trim a little; if losing too fast, add some back. For weight loss specifically, feed to the target weight and let your vet confirm the pace.
Frequently asked questions
- How many calories does my dog need?
- Start from the resting energy requirement, RER = 70 × (weight in kg)^0.75, then multiply by a life-stage factor: about 1.6 for a neutered adult, 1.8 if intact, 2.0–5.0 for very active or working dogs, 1.4 for seniors, and 2–3 for growing puppies. A 20 kg neutered adult needs roughly 1,000 kcal a day.
- How do I turn calories into cups of food?
- Find the kcal per cup on your food bag (often 300–450) and divide the daily calories by it. Enter that number in the calculator and it shows the cups. Two dogs of the same weight can need different cup amounts if their foods differ in density.
- Should I include treats?
- Yes — treats should stay under about 10% of daily calories, and they count toward the total. If you treat a lot, trim the meal portion a little to match.
- My dog needs to lose weight — what factor do I use?
- Pick the weight-loss option, which uses a factor of about 1.0 on the resting requirement for the target (ideal) weight, not the current one. Pair it with the ideal weight calculator, and have your vet confirm a safe rate of loss.
Sources
These are the references behind this calculator. Where a source gives a range we take the midpoint and round toward caution, and where we go beyond what a source states — an extra safety margin, or a rule of thumb rather than a clinical threshold — the page says so in the text above.
- Global Nutrition Guidelines — WSAVA
- General feeding guidelines for dogs — VCA Animal Hospitals