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Puppy Predictor

Newfoundland Size Calculator

How big will my Newfoundland get? Predict adult weight and track your puppy's development.

Breed Overview

About the Newfoundland

Sweet, patient, and devoted

Group

Working

Size Category

Giant

Lifespan

9-10 years

Full Maturity

24 months

Temperament Traits

SweetPatientDevotedGentleTrainable

Growth & Height Benchmarks

Expected Adult Weight

100-150lbs

Typical Male

100-150 lbs

28" tall

Typical Female

100-150 lbs

26" tall

How the Newfoundland Calculator Works

1

High-Sensitivity Dynamic Modeling

We use a proprietary High-Sensitivity Dynamic Model calibrated specifically for Newfoundland development. This accounts for the biological reality that growth velocity decelerates sharply as a puppy matures, ensuring pinpoint accuracy for both 8-week-old puppies and older teenagers.

2

Maturity Window Calibration

A Newfoundland typically reaches its full skeletal structure around 24 months. Our algorithm applies a specific maturity multiplier that adjusts the projection as your puppy approaches this target window.

3

Standard Deviation Check

Every projection is cross-referenced against the Newfoundland breed standard (100–150 lbs). While estimates can begin at 6 weeks, data collected after the 12-week mark provides the highest statistical confidence.

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