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Dog Calculators

Puppy Weight Calculator

Estimated adult weight of a puppy from its current age and weight.

Enter values

Results update as you type.

Result

Estimated adult weight

19.4 kg

In pounds
42.7
Growth completed
41.3 %
Weight still to gain
11.4 kg
Full size at about
12 months
Likely range
16.5 – 22.3 kg
Daily food at adult weight
1,034 kcal

About the Puppy Weight Calculator

Estimated adult weight of a puppy from its current age and weight.

Also known as: how big will my puppy get, adult dog weight predictor, puppy growth calculator, predict dog size.

How to use this calculator

  1. Enter current weight, age, expected breed size.
  2. The result updates instantly as you type — press Calculate (or Enter) at any time.
  3. Review the breakdown shown under the main result.
  4. Use Copy result or Share to save the answer or send a link with your inputs.

Formula

adult weight ≈ current weight ÷ fraction of growth complete

Worked example

Using the values pre-filled in the calculator above:

  • Current weight = 8 kg
  • Age = 16 weeks
  • Expected breed size: Medium breed

the calculator returns:

  • Estimated adult weight: 19.4 kg
  • In pounds: 42.7
  • Growth completed: 41.3 %
  • Weight still to gain: 11.4 kg