Pet

Puppy Weight Estimate Calculator

Roughly project an adult weight from a puppy's current weight and age.

This result is a rough estimate of the puppy's adult weight in kilograms, not an exact adult weight.

Formula

Adult weight is estimated as current weight divided by a growth fraction that reaches 1.0 at 24 months.

How it works

The fraction grows with age, so a young puppy's weight is scaled up more than an older puppy's. Mixed breeds and large breeds break this simple curve most, so treat it as a ballpark.

Worked example

For example, a puppy weighing 5 kg at 4 months gives 5 ÷ (0.5 + 4 ÷ 24) = 7.5 kg as a rough adult weight estimate.

FAQs

How accurate is it?
A rough guide only; breed growth charts are better when known.

Does it work for all breeds?
Large breeds grow longer, small breeds finish sooner.

When is it most useful?
For planning crate, carrier and food sizes, not for health decisions.

General information only, not veterinary advice.

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