Dog calculators
Every dog-focused calculator on this siteβgrowth, feeding, age, pregnancy, toxicity, hydration, and body condition. Example: a healthy adult often drinks about 50β60 ml of water per kg per day. Pick a tool below, then read the formula and sources on each page. Confirm care with your veterinarian.
Dog tools
Puppy Weight Calculator
Predict adult weight from age in weeks, current weight and breed or size. Growth chart in lb and kg; free, private.
Dog Food Calculator
Daily calories and cups from weight, life stage and label kcal per cup. RER/MER factors; lb or kg; free.
Puppy Food Calculator
Calculate puppy feeding amounts by current weight and expected adult size using RER and growth multipliers.
Homemade & Raw Dog Food Calculator
Estimate daily homemade or raw ration portions from body weight. Educational only β balance recipes with a vet nutritionist.
Dog Age Calculator
Dog years to human years by size with AAHA-style life stages and an optional log curve β not the 7:1 myth.
Dog BMI & Body Condition Helper
Screen body condition with a BMI-style index and the 1β9 BCS scale. Educational helper, not a diagnosis.
Dog Pregnancy & Due Date Calculator
Estimate whelping due date from breeding or ovulation date. Typical gestation is about 63 days.
Dog Chocolate Toxicity Calculator
Estimate theobromine dose from chocolate type, amount and weight. Call a vet or poison hotline if your dog ate chocolate.
Dog Water Intake Calculator
Estimate typical daily water needs from body weight and activity. Sudden changes warrant a vet visit.
Growing, feeding, and caring for a dog
Most dog questions follow the same arc. A puppy arrives and you want to know how big it will get, which the puppy weight calculator estimates from age, weight, and breed size. You then need a feeding plan: the puppy food calculator applies growth multipliers of two to three times resting energy, and once your dog is an adult the dog food calculator switches to maintenance factors. Our guides on when puppies stop growing and how much to feed a puppy explain the reasoning in plain language.
Dogs mature at different speeds. Toy breeds reach adult size around 10 months, while giant breeds can keep growing for two years, which is why age conversion depends on size. The dog age calculator replaces the outdated seven-to-one rule with a size-aware model, and the dog years myth guide explains why. To check that your dog stays lean through adulthood, pair the body condition helper with regular weigh-ins and the water intake calculator for a drinking baseline.
Some situations are time-sensitive. If a dog eats chocolate, call a vet first, then use the chocolate toxicity calculator and the chocolate safety guide to understand the dose. If you are breeding, the pregnancy calculator gives a due date window to discuss with your veterinarian. For owners who prepare meals at home, the homemade dog food calculator and the raw feeding basics guide cover portions and the nutritional risks of unbalanced recipes.
Every dog is an individual. Use these results as a starting point, check body condition regularly, and let your veterinarian make the final call. See the methodology and editorial policy for formulas and sourcing.
Related guides
When Do Puppies Stop Growing?
When puppies stop growing by size class, what affects adult weight, and when to switch from puppy to adult food β with a growth timeline.
How Much to Feed a Puppy
How much and how often to feed a puppy by age and adult size: daily calories, meals per day and signs of overfeeding, plus a free puppy food calculator.
The Dog Years Myth: Why 7:1 Is Wrong
Why the 7:1 dog-years myth fails, what AAHA life stages mean, and how the Wang et al. 2020 log curve (104 Labradors) compares.
Raw Feeding for Dogs: BARF vs Prey
What BARF and prey-model raw feeding mean, pathogen and balance risks, and how portion maths relates to a homemade food calculator (safety first).
Chocolate and Dogs: Why It Is Dangerous
Why chocolate is dangerous for dogs, theobromine by type, symptoms, and when to call ASPCA or Pet Poison Helpline β with a link to the toxicity calculator.
How Much Water Should a Dog Drink?
How much water a dog should drink per day by weight (~50β60 ml/kg), dehydration signs, and when to call your veterinarian.
How Long Are Dogs Pregnant?
Dog pregnancy length (~63 days from ovulation), week-by-week stages, and why ultrasound confirmation with your vet matters.
Dog Body Condition Score Chart
Dog body condition score chart (BCS 1β9) in plain words: ribs, waist, and abdomen cues to screen if your dog is overweight.
Homemade Dog Food Calories Guide
How to estimate homemade dog food calories with RER/MER context, portion maths, and why a veterinary nutritionist must balance recipes.