Stop guessing at feeding charts. DIY Farmer gives dogs and cats the exact calories they need — based on real weight, life stage, body condition, and activity. Vet-formula precision, done in 60 seconds.
Built on species-specific metabolism formulas — so your dog's kibble math and your cat's indoor feeding plan are each dialed in separately. No one-size-fits-all.
From gut-health diets to DNA meal plans — here's what's reshaping how smart pet parents feed their animals.
Minimally processed, refrigerated pet food is growing 28%+ per year. We break down whether it's actually worth the switch for your dog or cat.
Functional gut-support diets grew 18% in 2025. A healthy microbiome means sharper immunity, calmer digestion, and better mood in both dogs and cats.
DNA-informed feeding is the new frontier — tailored calorie targets and nutrient ratios built around your pet's breed and biological profile.
Pet fitness wearables now monitor calories burned, sleep quality, and early illness signals — closing the loop between feeding plans and real activity data.
Most pet parents are off by 20–40%. Our calculators give you the full picture — ideal weight target, portion sizes, treat budgets, and a printable cheat sheet for your fridge.
If your pet is over or under condition, we show the healthy weight to aim for — plus a safe weekly pace to get there.
Puppies need 2–3× the calories of adults. Seniors need less. Our multipliers shift automatically based on your pet's age.
Enter the kcal/cup of your current food and we'll tell you exactly how many cups, grams or cans to serve daily.
Take a clean one-page summary to your next vet visit — or stick it on the fridge as a feeding cheat sheet.
10% treat allotment is built in by default so your pet still gets the good stuff without busting calorie goals.
Each result links to a relevant explainer so you understand exactly why the number is what it is.
DIY Farmer is built by a small-animal nutrition specialist — three years of translating AAFCO science into plain, usable feeding advice for dogs, cats, and the humans who love them.
Because a Corgi, a Husky, and a Persian cat don't eat the same way. Deep-dive references for breed-specific needs, life stages, and common health conditions.
The full nutrition picture for dogs and cats — protein, fats, carbs, vitamins, life-stage needs, label reading, and more. Read time: 25 minutes.
Read the guide →20+ popular dog and cat breeds, each with weight ranges, common health issues, and breed-tuned feeding advice. Browse all in one place.
Browse breeds →Every breed has unique calorie needs, metabolic quirks, and dietary sensitivities. Find your dog's or cat's breed-specific feeding guide below.
Common feeding mistakes, breed-specific breakdowns, and real owner stories — all grounded in vet-reviewed science.
If your dog needs to drop weight, the food in the bowl matters more than anything else you can do. Daily exercise helps. Treat discipline helps. But the single ...
When a dog has chronic skin issues, recurring ear infections, or persistent digestive upset that won't quite resolve, food allergies are often the culprit — and...
Corgis are charming. They are also one of the most weight-prone breeds in the dog world. Their long backs, short legs, and historical role as low-effort herders...
It's 6 p.m. Your dog is staring at the bowl with that impossibly patient look. You scoop kibble by instinct — somewhere between what "feels right" and what the bag says. Sound familiar? You're not alone. The feeding guidelines on pet food packaging are written for an average, unspayed adult animal — they know nothing about your specific pet, their body condition, or whether they burned 400 calories racing around the yard or spent the day on the sofa. Same story for cats: the "indoor adult" default on most pouches still overfeeds the majority of neutered house cats.
That's exactly why DIY Farmer's free dog and cat calorie calculators exist — tools built on the same RER (Resting Energy Requirement) formula that veterinary nutritionists actually use, so you can finally answer the question every pet parent quietly asks: am I getting this right?
Pet nutrition isn't one-size-fits-all — and the variety within species alone makes it genuinely complicated. A Jack Russell Terrier and a French Bulldog can weigh the same 9 kilograms and need completely different calorie amounts, because one was bred to chase foxes across fields for six hours and the other was bred to sit elegantly on a lap in Paris. Add the difference between a bouncing 14-week-old puppy burning fuel for growth and a calm nine-year-old senior with a slower metabolic rate, and the bag guidelines start to look even less useful than they seemed.
The factors that truly determine how many daily calories a dog or cat needs are: body weight, life stage (puppy/kitten, adult, or senior), activity level, spay/neuter status — which reduces calorie needs by roughly 20% in both species — and individual breed metabolism. None of these live on the back of a bag.
The table below shows estimated daily calorie needs for a typical neutered adult dog at moderate activity, based on the veterinary RER formula. Use it as a reference — then run the calculator for your specific dog's personalised result.
| Dog Size | Weight Range | Daily Calories (est.) | Example Breeds |
|---|---|---|---|
| 🐩 Toy & Small | 2–10 kg (5–22 lb) | 175–490 kcal/day | Chihuahua, Pomeranian, Shih Tzu |
| 🐕 Medium | 10–25 kg (22–55 lb) | 490–985 kcal/day | Beagle, Cocker Spaniel, Corgi |
| 🦴 Large | 25–45 kg (55–100 lb) | 985–1,550 kcal/day | Labrador, Husky, German Shepherd |
| 🐻 Giant | 45 kg+ (100 lb+) | 1,550–2,200+ kcal/day | Great Dane, Mastiff, Saint Bernard |
⚕️ Based on RER = 70 × (body weight kg)^0.75 × 1.6 (neutered adult factor). Puppies, active dogs, and intact animals will need more. Consult your vet before significant dietary changes.
Getting your pet's personalised daily calorie target takes under 60 seconds. Here's how:
Sarah had been feeding her four-year-old Labrador, Finn, a cup and a half of kibble twice daily for two years — exactly what the bag said for a "30 kg active dog." Finn seemed fine. Happy, energetic, always ready for his morning walk. But at his annual check-up, the vet noted he'd quietly crept up to 34 kg. Not dramatically heavy. Just softer. The rib check failed.
When Sarah ran Finn's numbers through the DIY Farmer dog calorie calculator, the result surprised her. At moderate activity, neutered adult, his real daily target was around 1,180 kcal. Her kibble ran 410 kcal per cup — so Finn was getting 1,230 kcal/day. Just 50 extra calories per day. Over 52 weeks, that's 18,250 excess calories — around 2 kg of body fat, added invisibly, one slightly generous scoop at a time. She trimmed one scoop, added a 15-minute evening walk, and Finn was back to his ideal weight in ten weeks. No prescription diet. No drama. Just the right number.
Good pet nutrition doesn't need to be complicated — but it does need the right starting point. A vet-formula calorie calculator removes the guesswork, gives you a science-backed daily target, and takes under a minute to run. From there, the DIY Farmer breed guides and nutrition articles walk you through everything from reading ingredient labels to breed-specific metabolic quirks to knowing when your senior dog or aging cat needs a calorie adjustment. Use the calculators. Read the guides. Check in with your vet. That combination is genuinely all it takes to give your dog or cat a longer, leaner, healthier life.
DIY Farmer uses the standard veterinary formula RER = 70 × (body weight in kg)0.75, multiplied by life-stage and body-condition factors drawn from NRC 2006 and WSAVA guidelines. Results sit within ±10–15% of true need for most pets — a strong starting point. Re-check body condition every 2–4 weeks and tweak portions if you see weight drift.
Always enter current weight. The calculator uses body condition score (BCS) to estimate the ideal weight and adjusts calories automatically — for maintenance, weight loss, or growth.
DIY Farmer is led by Dr. Marcus Whitfield, a small-animal nutrition specialist with three years of dedicated focus in companion-animal nutrition. Every article and calculator formula is cross-referenced against AAFCO, WSAVA, and NRC guidelines.
No. The calculator runs entirely in your browser. We don't collect, store or sell personal information from calculator users. See our privacy policy for details.
A typical neutered adult indoor cat needs roughly 180–250 kcal/day — significantly less than most owners assume. A 4 kg neutered cat needs around 190–210 kcal/day. Outdoor cats or unneutered cats may need 20–40% more. Most pouches and cans are sized for two meals — feeding the whole pouch in one sitting to a small cat is the most common cause of feline weight gain. Use the DIY Farmer cat calorie calculator for a personalised target.
Body Condition Score is a 9-point scale (or 5-point in some systems) used by vets to assess whether a pet is underweight, ideal, or overweight — independent of the number on the scale. An ideal dog or cat scores 4–5 out of 9: ribs are easily felt but not visible, there's a clear waist when viewed from above, and a slight abdominal tuck from the side. BCS matters for calorie calculations because two animals of the same weight can have very different body compositions — muscle weighs more than fat. Our calculators use your BCS input to set a more accurate calorie target.
Spaying and neutering reduces resting metabolic rate in both dogs and cats — typically by 15–25%. This happens within weeks of surgery and is permanent. The reason: sex hormones influence energy expenditure, and removing them shifts the metabolic set point downward. A neutered adult dog or cat can gain weight on the same food that kept them lean before surgery, even without eating more. This is why the WSAVA and AAHA both recommend reducing portions immediately after spay/neuter, not waiting until weight is gained.
Review and potentially adjust portions whenever: weight changes by more than 5% unintentionally; the season shifts significantly (most pets are less active in winter); your pet moves life stages; you switch food brands to one with a different kcal density; or activity level changes materially (a new exercise routine, a new job that means less walks, etc.). As a minimum, weigh your pet monthly and re-run the calculator any time you notice a 2-week trend of weight change. Calorie needs are not static — they change as your pet changes.
DIY Farmer is designed for healthy dogs and cats with no active medical conditions. For pets with diagnosed conditions — kidney disease, diabetes, pancreatitis, IBD, liver disease, cancer, hypothyroidism, or any other clinical diagnosis — nutrition is part of medical management and should always be directed by your veterinarian or a board-certified veterinary nutritionist. Our calculators and guides are a complement to, never a replacement for, veterinary care.
No — and never intended to be. DIY Farmer is an educational resource. For diagnosed conditions, prescription diets, surgical recovery, or any significant health concern, work with your veterinarian. We're the daily nutrition guide; your vet is the medical decision-maker.