How big does a Saint Bernard get?

A full-grown Saint Bernard typically stands 65–70 cm (25.6–27.6 inches) tall at the shoulder and weighs 54–82 kg (119.0–180.8 lbs). Saint Bernard is considered a giant breed and may take up to 18–24 months to reach full size.

What is the lifespan of a Saint Bernard?

The average lifespan of a Saint Bernard is 8–10 years. Giant breeds typically have shorter lifespans than smaller breeds. Maintaining a healthy weight is one of the most important factors in extending your dog's lifespan — overweight dogs can lose 1–2 years of life expectancy.

What are the personality traits of a Saint Bernard?

Saint Bernard are known for being gentle, patient, watchful, calm. They are generally good with children and make excellent family dogs. They are moderately trainable with consistent positive reinforcement. They need plenty of space and exercise, making them better suited for homes with yards.

Is a Saint Bernard a good choice for apartments and families?

A Saint Bernard is a giant breed that typically needs more space and exercise, so they may not be ideal for small apartments. They are generally good with kids and make great family companions. Be prepared for significant shedding — regular brushing 2–3 times per week is recommended.

What are common health issues for giant breed dogs like the Saint Bernard?

Giant breeds like the Saint Bernard face increased risks of bloat (GDV), hip/elbow dysplasia, heart conditions, and bone cancer. Their large size puts extra stress on joints, making weight management critical. Keeping your dog at an ideal weight is the single most effective way to reduce the risk of many of these conditions. Use our BCS assessment tool above to check your dog's condition.

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Saint Bernard Weight & Calorie Guide

Q: How many calories does a Saint Bernard need per day?

A typical adult Saint Bernard weighing about 68 kg needs approximately 2652–3315 kcal per day, depending on activity level and neuter status. Puppies and very active dogs need more, while seniors and neutered dogs need less. Use our breed-specific calculator for an exact number.

Giant Breed

Quick Answer

A healthy adult Saint Bernard weighs 54–82 kg (119.0–180.8 lbs), according to the AKC breed standard. Puppies reach 50% of adult weight by 8–12 months and full weight by 18–24 months.

Source: AKC breed standard, WSAVA nutrition guidelines

Quick Facts

Ideal Weight

54–82 kg

(119.0–180.8 lbs)

Size Category

giant

Breed Type

Daily Calories

~2652–3315 kcal

Adult, neutered

Free Tools

BCS Assessment Calorie Calculator

Ideal Weight Range

54 kgto82 kg

119.0 lbsto180.8 lbs

UnderweightIdealOverweightObese

Data:AKC breed standard·WSAVA guidelines

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Puppy Weight Predictor

For puppies under 12 months. Enter your puppy's current weight and age to predict adult weight.

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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

Saint Bernard Health & Weight Management

Saint Bernard are gentle giants originally bred for Alpine rescue. Their massive frame makes weight management critical — every extra pound places enormous stress on joints already prone to hip and elbow dysplasia. They are also prone to bloat (GDV), cardiac issues, and Wobbler syndrome. Maintaining lean body condition is arguably the single most important factor in extending a St. Bernard’s quality of life.

Exercise: 30–45 minutes of gentle daily exercise — short walks and supervised yard time. Avoid forced running, jumping, and stair-climbing, especially during growth (under 18 months). Swimming is excellent low-impact conditioning. Avoid hot weather entirely due to heat sensitivity.

Feeding tips: Feed 2–3 measured meals daily using a giant-breed formula with controlled calcium-phosphorus ratio. Never exercise right before or after meals (bloat risk). Saint Bernards are gentle but persistent beggars — do not give in. Use slow-feeder bowls.

Keeping your Saint Bernard at a healthy 119–181 lbs (54–82 kg) is the best way to protect their joints and heart. Use PawScale’s calorie calculator for Saint Bernards to determine daily needs, monitor body condition with our BCS tool, and follow the crate size calculator.

Data source: AKC breed standard

Data source: AKC breed standard • Last updated: 2026-08-12

Is your Saint Bernard at a healthy weight?

59% of dogs are overweight — can you tell? Take our free 2-minute Body Condition Score assessment.

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Saint Bernard Calorie Calculator

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Frequently Asked Questions

How much should a Saint Bernard weigh?

The ideal weight for a Saint Bernard is 54–82 kg (119.0–180.8 lbs). Giant breeds have slower metabolisms, so weight management is especially important. Use our calorie calculator above to get personalized feeding recommendations.

How many calories does a Saint Bernard need per day?

A typical adult Saint Bernard weighing 68 kg needs approximately 2652–3315 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 Saint Bernard overweight?

59% of dogs are overweight, and most owners cannot tell just by looking. Check your Saint Bernard'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 Saint Bernard reach full adult weight?

Saint Bernard puppies reach 50% of their adult weight by 8–12 months and typically reach full adult weight by 18–24 months, according to AKC growth guidelines. Small breeds mature faster than large breeds.

What size crate does a Saint Bernard need?

A Saint Bernard typically needs a 48-inch crate based on breed size. Use PawScale's free crate size calculator for a personalized recommendation.

References & data sources

1. AKC Official Breed Standard — Saint Bernard. 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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