Dog calculators & tools
Quick, vet-informed estimates for everyday dog questions — from heat cycles and age in human years to crate sizing and what’s toxic. Free, no sign-up, and built to be honest about the ranges.
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Ranked breed guides for the questions owners ask most.
AI Tools
Health & breeding
Dog Heat Cycle CalculatorEstimate the four stages of your dog's heat, her fertile window, and when the next cycle is likely.Dog Age CalculatorConvert your dog’s age to human years using the modern, size-adjusted formula.Dog Lifespan CalculatorEstimate life expectancy from breed size and weight, with tips to add healthy years.Dog Quality of Life CalculatorScore comfort, mobility, appetite and good days vs. bad to support hard end-of-life decisions.Puppy Weight CalculatorPredict your puppy’s adult weight from its current age and weight.Dog Pregnancy CalculatorEstimate the whelping (due) date and key milestones from the breeding date.Dog Vaccination Schedule CalculatorSee your puppy’s DA2PP and rabies dates from birth, and what’s due now and coming up.Dog Body Condition Score CalculatorIs your dog a healthy weight? A guided 9-point body check with an ideal-weight range by size.Dog Skin Symptom CheckerUpload a skin photo and symptoms for cautious AI triage, red flags, and vet-visit guidance.Dog Spay & Neuter Timing CalculatorWhen is the right age to spay or neuter? Get a window by size and sex, with the trade-offs.
Care & feeding
Dog Water Intake CalculatorHow much water your dog should drink per day, by weight, activity and food type.Dog Walking CalculatorHow much daily walking your dog needs by breed and age — and the calories you both burn.Dog Food CalculatorHow much to feed your dog per day, from daily calorie needs (RER/MER) and your food’s calories.Homemade Dog Food CalculatorEstimate cooked homemade dog food portions, meals, ingredient split, and batch prep by calories.Dog Treat Calorie CalculatorUse the 10% treat rule to calculate a safe daily treat budget and food adjustment.Dog Veggie Prep CalculatorConvert raw dog-friendly vegetables into cooked yield, freezer bags, and plain cooking notes.
Cost & planning
Dog Cost CalculatorWhat a dog really costs — upfront, monthly, and lifetime — adjusted for your country and dog size.Dog Insurance Cost CalculatorHow much is pet insurance? Estimate a monthly and yearly premium range by size, age, and region.Dog Food Cost CalculatorHow much does dog food cost per month? Combine calorie needs with your food’s real bag price.
Sizing
Safety
Onion Toxicity for Dogs CalculatorEstimate whether the amount of onion your dog ate is a toxic dose for their weight.Raisin & Grape Toxicity CalculatorGauge the risk after your dog eats grapes or raisins, and when to call the vet.Chocolate Toxicity CalculatorEstimate the risk from the type and amount of chocolate your dog ate, by weight.Can Dogs Eat It? Food Safety CheckerSearch any human food — chocolate, grapes, xylitol — to see if it’s safe or toxic for your dog.
New calculators ship regularly. Looking for a breed instead? Browse all dog breeds →
These tools give general estimates for healthy dogs and are not a substitute for veterinary advice. For any urgent concern — especially suspected poisoning — contact your vet or an animal poison control line right away.