Which dog calculator do I need?
- Not sure how much to feed? The dog food calculator converts your dog's daily calorie needs into cups using the kcal/cup on your bag. Bag feeding guides often overestimate for neutered, less active pets.
- Dog needs to lose weight? The dog calorie calculator uses the veterinary approach of feeding resting energy at the ideal weight, and estimates how many weeks the plan will take.
- New puppy? The puppy weight calculator predicts adult size from current weight, age and breed size, and our breed growth charts show expected weight month by month.
- Curious about age? The dog age calculator converts dog years to human years by size, because large dogs age faster than small ones.
- Expecting puppies? The dog pregnancy calculator gives a due date (about 63 days) and a dated week-by-week timeline.
- Dog ate chocolate? The chocolate toxicity calculator estimates the dose in mg/kg using Merck Veterinary Manual values, and tells you how urgent it is.
- Allergies or a bee sting? The Benadryl dosage calculator gives the usual diphenhydramine dose (1 mg per lb) in tablets or liquid, with the safety rules vets give.
- Dog ate sugar-free gum, onion or garlic? Use the xylitol, onion and garlic toxicity calculators, or browse what to do if your dog ate something.
- Drinking a lot? The dog water intake calculator shows normal daily water and when drinking is too much.
- Is my dog a healthy weight? The dog weight chart lists adult weights by breed and estimates ideal weight from body condition.
How our dog calculators work
All feeding tools start from the resting energy requirement, RER = 70 × kg0.75, the formula used in veterinary nutrition, then apply a life-stage multiplier (for example 1.6 for a neutered adult or 3.0 for a young puppy). Toxicity tools use published dose thresholds and always recommend contacting a vet. Every page lists its sources; see our editorial policy.