Dog calculators
Dog calorie calculator
How many kcal your dog needs per day, from the veterinary RER formula and life stage.
Dog food portion & cost
Grams or cups per day from the label's kcal, plus days per bag and monthly cost.
Chocolate toxicity check
Dog ate chocolate? Estimate the dose in mg/kg and how urgently to call the vet.
Dog age in human years
Size-adjusted conversion, plus the 2020 epigenetic-clock formula for comparison.
Puppy weight predictor
Estimate adult size from your puppy's current age and weight, by breed size class.
Dog water intake
A daily hydration target in ml and cups, adjusted for heat and activity.
Dog pregnancy due date
Expected whelping date and week-by-week milestones from the mating date.
Cat calculators
Cat calorie calculator
Daily kcal for indoor cats, kittens and weight loss — from the feline RER method.
Cat food portion & cost
Grams or pouches per day from the label — wet, dry or both — plus monthly cost.
Cat age in human years
Cat years converted properly, with your cat's life stage from kitten to senior.
Cat water intake
A daily hydration target — and why wet-fed cats barely drink from the bowl.
Cat pregnancy due date
Expected kitten due date and milestones from the mating date.
Why KibbleMath
Metric-first, label-friendly. Most pet calculators assume cups and pounds. Ours work in grams, kilograms and kcal per 100 g — the way food is actually labelled in Europe — with imperial units one tap away.
The working is shown. Every tool states the formula it uses and where it comes from, so you can sanity-check the result instead of trusting a black box.
No signup, no nonsense. Everything runs in your browser. Results are starting points to discuss with your vet — not a replacement for one.