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Puppy Weight Predictor

Predict a puppy's adult weight from breed, current age and current weight.

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Puppy Weight Predictor works straight from this page — free, instant, nothing to install. You will find it under Pets & animals, with Baby Eye Color Predictor and Chinese Gender Predictor for the neighbouring cases.

How to use it

  1. Open the tool — no signup or install needed.
  2. Enter your input or adjust the available options.
  3. Get your result instantly, then copy or download it.

Frequently asked questions

What is Puppy Weight Predictor?

Predict a puppy's adult weight from breed, current age and current weight.

When would I actually use this?

Day-to-day care: how much to feed at a given weight, whether a size is right for the breed, and what a life stage means in human terms.

What is the most common mistake?

Using the seven-years rule for a dog's age. Ageing is fast in the first two years and then slows, and it slows much more for a small breed than for a large one — the multiplier is not a constant.

How is Puppy Weight Predictor different from Baby Eye Color Predictor?

They sit next to each other but answer different questions: Baby Eye Color Predictor is the one to open when you need it to punnett odds for your baby's eye colour from both parents — and the grandparents, which reveal hidden recessives. Pick whichever matches what you're starting from — both are free.

Is there a tool for the next step?

Chinese Gender Predictor is the closest one after this: Use the traditional Chinese gender chart to guess boy or girl from the mother's lunar age and lunar conception month — either entered manually or derived from dates. Just for fun, not scientific.

What else is worth having open alongside it?

Aquarium Heater Wattage Calculator and Aquarium Substrate Calculator — they come up in the same task often enough to be worth a second tab.

Where do the figures come from?

Portions follow published feeding guidelines by species and weight; age equivalences use the size-dependent curves rather than a flat multiplier. None of this replaces a veterinarian, especially for an animal that is unwell.

Further reading

All guides →
ExplainerHow Big Will This Puppy Get? The Size Class DecidesThe same 12.7 kg puppy at sixteen weeks predicts a 21.9 kg adult if it is a small breed and 38.5 kg if it is a giant one. The arithmetic is trivial; the class you pick is worth seventy-six per cent.How-toThe IATA Crate Formula an Airline Measures at Check-InLength A + half B, width twice C, height D. The width rule is the one that fails people: a dog with 28 cm shoulders needs 56 cm of interior width, and no crate sold by weight rating tells you that.ExplainerHow Much Chocolate Is Toxic to Dogs? Dose by Type and Body WeightCall a vet first, then read this. Toxicity depends on the theobromine dose in milligrams per kilogram of dog: dark chocolate is nearly three times worse than milk chocolate by weight, baking chocolate seven times and dry cocoa powder thirteen times. Here is the table by type and dog weight.ExplainerHow Long Is a Dog Pregnant? Why a Date From Mating Is a RangeSixty-three days is measured from ovulation, not from the mating. Counted from a mating date the same pregnancy spreads over two weeks, because sperm survive for days and a bitch is often mated more than once. What the calculator does with that, and where its window stops four days early.How-toHow Much Substrate Does an Aquarium Need? Depth, Weight and Grain SizeThe depth follows the job: a bare display, a planted tank whose roots need room, an under-gravel plate. Then comes the number people are unprepared for — substrate is what puts a filled tank past what a piece of furniture can hold. Plus why fine sand compacts and coarse gravel traps waste.ExplainerHow Many Fish Can a Tank Hold? The Inch-per-Gallon Rule Is WrongEvery stocking calculator implements a length-per-volume rule, and waste output scales with body mass, not length. A fish twice as long makes nearly five times the ammonia. Run through the tool's five methods, the same tank comes back holding anywhere from 6 to 12 fish.