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Puppy calculators that show their working
Most puppy tools divide weight by age, multiply by 52, and call it a prediction. Ours are built on veterinary growth standards modelled from the bodyweight records of millions of young dogs, and every page prints the formula and the study it came from.
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Growth and size
How big your puppy will get, and whether it is growing on track.
- Puppy weight calculatorPredict adult weight from your puppy’s current weight, age and size category.
- Puppy growth calculatorPlot your puppy on veterinary centile curves and see whether the trajectory is steady.
- Puppy size calculatorWork out which adult size category your puppy falls into, and what that means.
- Puppy to dog weight calculatorConvert a current puppy weight into an expected grown-dog weight range.
- Mixed breed weight calculatorEstimate adult size for a mixed breed puppy without a DNA test.
- Goldendoodle weight calculatorCompare Toy, Miniature and Standard Poodle parent ranges, then estimate from your puppy’s own growth.
- Labradoodle weight calculatorSee how the Poodle parent changes the size context, then estimate from age and current weight.
- Cockapoo weight calculatorCompare Cocker Spaniel and Poodle standards before estimating from your puppy’s own measurements.
- AKC formula calculatorRun the weight formulas the AKC popularised, and see how far they land from a growth curve.
- Puppy growth chartPrintable weight-by-age tables for every size category.
Feeding and nutrition
How much food, how many calories, and how that changes with age.
- Puppy feeding calculatorHow much to feed each day, split into the right number of meals.
- Puppy raw food calculatorDaily raw portions by age, with the muscle, bone and organ split.
- Puppy calorie calculatorDaily calories from the veterinary RER formula and the growth multiplier.
- Puppy water intake calculatorHow much water a puppy should drink in a day, and when to worry.
Age and life stages
Converting weeks to months, and what to expect at each stage.
Breeding and whelping
Due dates and the whelping timeline, counted from the right event.
Cost
What the first year actually costs.
Why these answers differ from other puppy calculators
Puppy growth is an S-curve, not a straight line. It is slow at first, accelerates, then flattens as the growth plates close. A toy breed is already about a third of its adult weight at eight weeks; a giant breed is barely a tenth of the way there. Any tool that applies one linear formula to both is going to be confidently wrong for at least one of them.
We use size-specific centile curves instead, so the answer accounts for how your puppy's size category actually grows, and we report where your puppy sits on the curve rather than only guessing its final weight. The trajectory is the part your vet cares about. The methodology page explains it in full, including the two places where the method stops being reliable.
Where the reasoning is written out
Every calculator shows its formula, but the arguments behind them live in the guides: how big your puppy will get, how accurate these predictions really are, how much to feed at each age, and what the socialisation window actually costs if you miss it.
What we will not do
We do not publish medication dosing calculators. Getting a dose wrong on a small puppy causes real harm, and the correct number depends on the exact product, current weight and health status. That belongs with your veterinarian. Our disclaimer sets out the full position, including the signs that mean you should stop reading and call a vet.