When is a Bearded Collie fully grown?

Most Bearded Collies reach their maximum height by 12 months, but continue to fill out with muscle mass until about 18 months of age.

Puppy Predictor

Bearded Collie Size Calculator

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

Puppy Weight Forecaster

Predicting the growth of your Bearded Collie

🐾

Dog's Name

Breed

Gender

MaleFemale

Age

Current Weight (lbs)

petcarecalc.com

📈

Personalized Chart

Enter age and weight to see your dog's unique trajectory.

Breed Standard

Projection

Current

Breed Overview

About the Bearded Collie

Bouncy, smart, and full of charm

Group

Herding

Size Category

Medium

Lifespan

12-14 years

Full Maturity

15 months

Temperament Traits

BouncySmartAffectionatePlayfulLoyalEnergetic

Also known as

Beardie

Growth & Height Benchmarks

Expected Adult Weight

45-55lbs

Professional photograph of a Bearded Collie - Bearded Collie growth standards

Typical Male

45-55 lbs

21-22" tall

Typical Female

40-50 lbs

20-21" tall

Similar Sized Breeds

Bulldog Siberian Husky Australian Shepherd English Springer Spaniel Brittany

How the Bearded Collie Calculator Works

High-Sensitivity Dynamic Modeling

We use a proprietary High-Sensitivity Dynamic Model calibrated specifically for Bearded Collie 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.

Maturity Window Calibration

A Bearded Collie typically reaches its full skeletal structure around 15 months. Our algorithm applies a specific maturity multiplier that adjusts the projection as your puppy approaches this target window.

Standard Deviation Check

Every projection is cross-referenced against the Bearded Collie breed standard (45–55 lbs). While estimates can begin at 6 weeks, data collected after the 12-week mark provides the highest statistical confidence.

Found this tool useful?

Share PetCareCalc with other pet owners or save the link to track your puppy's progress as they grow.

Embed this tool

Add our professional calculator to your own website

<!-- Dog Size Calculator by PetCareCalc.com -->
<iframe src="https://www.petcarecalc.com/embed/weight-calculator" width="100%" height="650" frameborder="0" style="border-radius: 24px; box-shadow: 0 10px 30px rgba(0,0,0,0.1);"></iframe>
<p style="text-align: center; font-size: 12px; color: #94a3b8; margin-top: 12px;">
  <a href="https://www.petcarecalc.com" target="_blank" style="color: #2563eb; font-weight: bold; text-decoration: none;">petcarecalc.com</a>
</p>

🐾