How accurate is puppy weight prediction?

Estimates vary by breed and genetics. Use as a rough guide and confirm with your veterinarian.

Puppy Weight Calculator — Adult Size Estimate

Estimate adult dog weight from current puppy weight and breed size. Free puppy growth calculator.

Puppy age (weeks)

Current weight (lb)

Breed size

Formula used

Adult weight ≈ Current weight × breed multiplier (rule of thumb)

Examples

Try a sample calculation

16 weeks, 20 lb medium

Growing puppy

Breed-size multipliers.

Planning for food and crate size.

Enter the required fields—dates, amounts, percentages, or measurements as labeled.
Double-check units (currency, tax rate, height/weight) match your scenario.
Run the calculation and read the breakdown, not just the headline number.
Adjust inputs to compare scenarios, or open a related Rankify calculator for the next step.

Find exact age in years, months, and days from a birth date.