Border Collie Weight & Calorie Guide
Quick Answer
A healthy adult Border Collie weighs 14–20 kg (30.9–44.1 lbs), according to the AKC breed standard. Puppies reach 50% of adult weight by 5–6 months and full weight by 12–14 months.
Source: AKC breed standard, WSAVA nutrition guidelines
Quick Facts
Ideal Weight Range
Puppy Weight Predictor
For puppies under 12 months. Enter your puppy's current weight and age to predict adult weight.
How the puppy weight predictor works
This predictor uses growth milestone data from Salt et al. (2017), published in Veterinary Record, which tracked the weight development of dogs across five size categories from birth to adulthood. By comparing your puppy's current weight against the expected growth percentage for their age and size category, we estimate their adult weight range.
Factors that affect adult weight
Genetics play the largest role, but nutrition, neutering status, and overall health also influence growth rate. Puppies fed excessive calories during rapid growth phases may exceed their genetic weight potential, while underfed puppies may not reach it. Large and giant breeds grow more slowly than toy and small breeds, reaching full size at 18–24 months rather than 10–12 months.
Data source: Salt et al. (2017) "Growth patterns of commercial kennel dogs" Veterinary Record • AKC breed standards
Border Collie Health & Weight Management
Border Collies are the most energetic herding breed in common ownership. Bred to drive sheep for miles across rough terrain, they need far more exercise and mental stimulation than most owners provide. Without adequate activity, Border Collies develop compulsive behaviours — chasing shadows, snapping at light reflections, and obsessively herding children or other pets. Collie eye anomaly (CEA) and hip dysplasia are breed-specific health concerns.
Exercise: Border Collies need 90–120+ minutes of vigorous exercise daily — running, agility, herding trials, frisbee, or structured fetch. A walk around the block will not suffice. Mental stimulation is equally important: puzzle toys, obedience training, and scent work exhaust a Border Collie as thoroughly as physical exercise.
Feeding tips: Active Border Collies burn significant calories — an agile dog in training may need 1,000–1,400 kcal daily. On rest days, reduce portions to prevent weight gain. Choose a high-protein formula (25%+ protein) to support lean muscle. Avoid feeding immediately before intense exercise to reduce bloat risk.
Keeping your Border Collie at an ideal weight of 31–44 lbs (14–20 kg) is essential for joint health and longevity. Use PawScale's calorie calculator for Border Collies to dial in daily nutrition, check body condition with our BCS assessment, and build a custom meal plan with the feeding guide.
Border Collie vs Similar Herding Breeds
| Breed | Weight | Height | Energy | Best For | |-------|--------|--------|--------|----------| | Border Collie | 14–20 kg | 46–56 cm | Very High | Active owners, agility | | Australian Shepherd | 18–29 kg | 46–58 cm | Very High | Ranch work, sports | | Shetland Sheepdog | 6–12 kg | 33–41 cm | High | Apartments, families | | Collie | 22–34 kg | 51–61 cm | Moderate | Families, companionship |
Border Collie Weight by Age
| Age | Male Weight | Female Weight | |-----|------------|--------------| | 8 weeks | 3–5 kg | 2.5–4.5 kg | | 3 months | 5–8 kg | 4.5–7 kg | | 6 months | 9–14 kg | 8–12 kg | | 12 months | 12–18 kg | 11–16 kg | | 18 months (adult) | 14–20 kg | 12–19 kg |
Data source: AKC breed standard
Data source: AKC breed standard • Last updated: 2026-08-12
Is your Border Collie at a healthy weight?
59% of dogs are overweight — can you tell? Take our free 2-minute Body Condition Score assessment.
Border Collie Calorie Calculator
Calculate daily calorie needs in 3 steps
Weight Management Tips for Border Collie
Breed-specific guidance backed by veterinary research
Obesity Risk
Border Collies are among the most energetically demanding breeds — but pet Collies with reduced activity gain weight rapidly. Calorie needs range from ~730–1,160 kcal/day for moderate pet activity up to 2,000+ kcal/day for working dogs — a 2–3x variance.
Breed-Specific Weight Management Tips
- Portion by activity level — a working Border Collie and a couch-potato pet have vastly different needs
- Winter weight creep is common — exercise decreases but appetite stays the same
- Food allergies can complicate weight management — recalculate portions when switching diets
Health Risks of Obesity
- Hip dysplasia: Moderate prevalence; excess weight accelerates degeneration in a breed that needs to be agile
- Epilepsy: Breed is predisposed; obesity-related inflammation may lower seizure threshold
- Exercise intolerance: Even 2–3 lbs excess weight noticeably reduces agility and stamina
BCS Quick Check
For Border Collies, even 1 lb over ideal weight adds measurable time to agility courses. Use the BCS chart to maintain peak performance condition.
Male vs Female Border Collie: Size Difference
Male and female Border Collies differ noticeably in size. Males are typically heavier and taller at the shoulder.
| Metric | Male | Female |
|---|---|---|
| Weight | 14–20 kg (30–45 lbs) | 12–19 kg (27–42 lbs) |
| Height at Shoulder | 48–56 cm (19–22 in) | 46–53 cm (18–21 in) |
| Ideal BCS | 4–5/9 | 4–5/9 |
Data based on AKC breed standard and WSAVA body condition guidelines.
Frequently Asked Questions
How much should a Border Collie weigh?
The ideal weight for a Border Collie is 14–20 kg (30.9–44.1 lbs). Weight can vary based on gender, age, and individual build. Use our calorie calculator above to get personalized feeding recommendations.
How many calories does a Border Collie need per day?
A typical adult Border Collie weighing 17 kg needs approximately 938–1172 kcal per day, depending on activity level and whether they are neutered. Use our breed-specific calculator above for an exact number based on your dog's details.
Is my Border Collie overweight?
59% of dogs are overweight, and most owners cannot tell just by looking. Check your Border Collie's Body Condition Score (BCS) — if you can't easily feel their ribs or they have no visible waist from above, they may be overweight. Take our free 2-minute BCS assessment above to find out.
When does a Border Collie reach full adult weight?
Border Collie puppies reach 50% of their adult weight by 5–6 months and typically reach full adult weight by 12–14 months, according to AKC growth guidelines. Small breeds mature faster than large breeds.
What size crate does a Border Collie need?
A Border Collie typically needs a 36-inch crate based on breed size. Use PawScale's free crate size calculator for a personalized recommendation.
How many calories does a Border Collie need per day?
A pet Border Collie with moderate activity needs ~730–1,160 kcal/day, while a working dog may need 2,000+ kcal/day. Use our calorie calculator for the exact number based on your dog's weight and activity — the 2-3x variance means guessing often leads to overfeeding.
Can overfeeding cause behavioral problems in Border Collies?
While overfeeding doesn't directly cause behavioral issues, excess weight reduces the agility and stamina Border Collies need for work and play. Frustration from reduced capacity can manifest as redirected behaviors. Check the BCS chart to ensure peak condition.
How much should a 6-month-old Border Collie weigh?
A 6-month-old male Border Collie typically weighs 11–15 kg (24–33 lbs), while females weigh 10–13.5 kg (22–30 lbs). If your puppy is significantly outside this range, consult your veterinarian about nutrition and growth rate.
Are Border Collies heavy dogs?
Border Collies are medium-sized dogs, not heavy. Males average 14–20 kg (30–45 lbs) and females 12–19 kg (27–42 lbs). Their athletic build and high energy levels mean they require more calories per kg than less active breeds.
How much should a Border Collie eat per day?
An adult Border Collie typically needs 900–1,400 calories per day depending on activity level. Use our Calorie Calculator for an exact RER-based figure, then convert to food volume with our Feeding Plan tool.
References & data sources
1. AKC Official Breed Standard — Border Collie. akc.org
2. Salt C, et al. “Estimating the expected growth of dogs.” Vet Record, 2017;180(15):376.
3. National Research Council. Nutrient Requirements of Dogs and Cats. National Academies Press, 2006.
4. Laflamme DP. “Development and validation of a body condition score system for dogs.” Canine Practice, 1997;22(4):10–15.
5. WSAVA Global Nutrition Guidelines; Association for Pet Obesity Prevention (APOP) 9-point BCS scale.
Last reviewed: September 2026
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