Dog Size Calculator

Estimate a puppy's adult weight.

Estimated adult weight 16

Estimated adult weight 35.274

Formula: adult ≈ weight at 16 weeks × 2

Step-by-step with your numbers:

1. Values used:

2. Weight at 16 weeks = 8

4. Estimated adult weight = 16

5. Estimated adult weight = 35.274

Did we solve your problem today?

A common rule estimates adult dog weight as roughly double the 16-week (4-month) weight.

The math behind it

adult weight ≈ 16-week weight × 2 (works best for small and medium breeds).

8 kg at 16 weeks → ~16 kg adult.

Giant breeds?

They keep growing for 18–24 months and can exceed this estimate.