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.
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 →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...
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.
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.