How much should I feed an adult St. Bernard?

A healthy adult St. Bernard (about 120–180 lb) needs roughly 2,250–3,150 calories a day — about 6½ to 9 cups of dry food, split into two meals. The exact cups depend on your food's kcal per cup (check the bag); see the adult row matching your dog's weight.

How many times a day should a St. Bernard eat?

Two measured meals a day for adults — not one large bowl. AKC lists St. Bernards among the large- and giant-breed dogs at greatest risk of bloat, and feeding two measured meals rather than one large bowl is the standard precaution. Slowing the dog down with a slow-feeder bowl helps too. Growing puppies eat 3–4 smaller meals.

How much should I feed a St. Bernard puppy?

A St. Bernard puppy under 4 months is fed about 3× its resting energy needs across 3–4 small meals a day; from 4 months it steps down toward 2× across 3 meals. Find your puppy's current weight in the puppy rows of the chart above for an estimated daily amount, and confirm with your vet — giant-breed puppies do better on slow, steady growth than fast.

When should a St. Bernard switch from puppy to adult food?

Around 24 months — much later than smaller breeds. Giant breeds like St. Bernards keep growing for nearly two years, and switching too early can rush growth in a way that affects long-term joint and frame health. Your vet can confirm timing based on your dog's actual growth.

How do I know if my St. Bernard is overweight?

A general body-condition check: you should be able to feel the ribs without pressing through fat, with a clear waist tuck behind the ribcage. St. Bernards are large and heavily-coated, so the coat can hide a thickening waist — use your hands, not just your eyes.

Why is bloat a worry for St. Bernards?

AKC lists St. Bernards specifically among the large- and giant-breed dogs at greatest risk of bloat (gastric dilatation-volvulus), a fast-moving, life-threatening condition. Practical risk-reduction levers: two measured meals a day rather than one large bowl, slowing the dog down with a slow-feeder bowl, and avoiding heavy exercise right after eating.

St. Bernard Feeding Chart: How Much to Feed by Age & Weight

A healthy adult St. Bernard (120–180 lb) needs roughly 2,250–3,150 calories a day — about 6½ to 9 cups of dry food. Split it into two meals rather than one big bowl: AKC lists St. Bernards among the large- or giant-breed dogs at greatest risk of bloat, and two measured meals is the standard precaution.

Growing St. Bernard puppies need more per pound, fed across 3–4 meals, and as a giant breed they shouldn't be moved onto adult food too early — around 24 months is typical to give frame and joints time to develop. The chart below gives sourced starting points by weight; the calculator tailors them to your dog.

Healthy adult St. Bernard sitting calmly beside a large food bowl in a sunny outdoor setting

Last updated 2026-05-30 · Every number links to its source.

Daily Feeding Amounts by Weight & Age

Find your dog's current weight in the chart for an estimated daily amount. Calories come from the Merck Vet Manual energy formula; cups assume a typical ~350 kcal/cup dry food, so check your bag's label for its exact kcal/cup.

St. Bernard feeding chart — daily food by weight and age

⬇ Save chart as image

See the exact numbers as a table

Puppy (under 4 months) — 4 meals/day

RER × 3.0 (Merck, high-growth window)

Weight	Daily calories	~ Cups/day	~ Grams/day
18 lb	1014 kcal	2.9	290 g
36 lb	1706 kcal	4.9	487 g
54 lb	2312 kcal	6.6	661 g
72 lb	2869 kcal	8.2	820 g

Puppy (4 months to 24 months) — 3 meals/day

RER × 2.0 (Merck)

Weight	Daily calories	~ Cups/day	~ Grams/day
18 lb	676 kcal	1.9	193 g
36 lb	1137 kcal	3.2	325 g
54 lb	1541 kcal	4.4	440 g
72 lb	1913 kcal	5.5	547 g

Adult — 2 meals/day

RER × 1.6 neutered (Merck; intact a little more, obesity-prone a little less)

Weight	Daily calories	~ Cups/day	~ Grams/day
120 lb	2244 kcal	6.4	641 g
140 lb	2520 kcal	7.2	720 g
160 lb	2785 kcal	8	796 g
180 lb	3042 kcal	8.7	869 g

These are healthy-dog starting points, not a strict rule — body condition and activity vary. Confirm your dog's target with your veterinarian. For your exact dog, use the calculator below.

Is my puppy a healthy weight for its age?

Rather than one “correct” weight, vets track puppies against evidence-based growth standards that run from 12 weeks to 2 years.

Those standards are grouped by a dog's adult body size (up to 40 kg), not by individual breed.

We don't publish a per-age “your puppy should weigh X” figure — that belongs on a vet's growth chart, weighed over time. What we give you instead is the daily caloriesfor your dog's actual weight today (the chart above and the calculator below), every number cited.

Adjust this plan for your own dog

The plan below is for a typical St. Bernard. Change the details to match yours.

The plan for a typical St. Bernard

🐕 Here's the plan for your St. Bernard

Healthy puppy (4 months+) · 4 months old · 75 lb

1972 cal/day · ~5.6 cups · 3 meals/day

🍽 HOW MUCH YOUR ST. BERNARD PUPPY SHOULD EAT

Your little one is growing fast — and that takes fuel. About 1972 calories a day will keep your st. bernard on a healthy track.

Here's what that looks like in your kitchen:

📏 ~ 563 grams on a kitchen scale

🥤 ~ 5.6 standard measuring cups (the 1-cup kind)

☕ ~ 2.8 large coffee mugs worth

Split into 3 meals a day:

≈ 657 calories per meal (~188 g / ~1.9 cup)

Why 3 meals?

Puppies have small stomachs and growing bodies that want food often. As your dog grows, you'll feed less often:

• 6 to 12 weeks: 4 meals a day
• 3 to 6 months: 3 meals a day ← your puppy now
• 6 to 12 months: 2 meals a day
• After age 1: 2 meals a day

Just look up your puppy's age in months and pick the row that matches.

📦 One quick thing:every brand has slightly different calories per cup. Your bag's label tells you exactly — look for “kcal per cup” and divide 1972 by that number for your real cup count.

Specific to St. Bernard

•St. Bernards are among the large- and giant-breed dogs the AKC names at greatest risk of bloat (gastric dilatation-volvulus). Slowing down eating — two measured meals a day rather than one large bowl, plus slow-feeder bowls — is the practical risk-reduction lever.

💧 Water~75 oz/day▼

A good rule of thumb: a weaned puppy needs about ½ to 1 ounce of water per pound of body weight each day. The numbers below use the higher end as a safe target — most dogs settle in somewhere in this range.

For your 75-pound st. bernard, that's:

💧 ~ 75 oz / ~ 2218 ml a day

🥤 ≈ 9.4 measuring cups

🍶 ≈ 4.7 standard 16-oz water bottles (Aquafina / Poland Spring size)

Keep the bowl filled with fresh water.

🍬 Treatsup to 197 cal/day▼

Treats are great for training and bonding — but they should be the bonus, not the main course.

The 90/10 rule keeps things balanced:

• 90% of daily calories from real dog food
• 10% from treats, chews, table scraps — anything extra

For your 75-pound st. bernard at 1972 calories/day, that means up to 197 calories from treats.

💡 Don't forget the small stuff. That bite of cheese you sneak them, the piece of chicken from dinner, the dental chew before bed — it all counts toward the 10%. Adds up faster than most of us expect.

🛒 How to choose dog food▼

Walking into the pet store can be overwhelming. But you only need to check the back or side of the dog food bag for these things:

☐ The bag has an AAFCO Nutritional Adequacy Statement that mentions “growth”
Look for a full sentence on the back or side of the bag containing both “AAFCO” and “growth”. Typical wording is one of two formats:
- “[Brand] is formulated to meet the nutritional levels established by the AAFCO Dog Food Nutrient Profiles for growth.”
- “Animal feeding tests using AAFCO procedures substantiate that [Brand] provides complete and balanced nutrition for growth.”
For large-breed puppies (adults expected to exceed 70 lb), the statement should also mention large size dogs.
☐ “Calories per cup” is printed on the bag
Usually in the feeding guide section. You need this number to know exactly how much to scoop for your dog.

🚫 FOODS TO KEEP AWAY FROM YOUR ST. BERNARD

Some everyday human foods are dangerous — even tiny amounts can cause serious harm. Keep these well out of reach:

Never feed: chocolate, xylitol (sugar-free gum / candy / some peanut butters), grapes, raisins, onions, garlic, macadamia nuts, alcohol, caffeine, avocado.

⚠️ Xylitolis a sweetener that's safe for humans but can be deadly to dogs. If your dog ingests anything containing xylitol, call your vet right away.

A few feeding habits to skip:

Free-feeding (leaving food out all day). It sounds convenient but makes portion control and weight monitoring much harder.
Switching food suddenly. Transition over 7-10 days — mix the new food with the old in growing proportions to avoid an upset stomach.
Switching to adult food too early. Puppy formulas are higher in protein than adult formulas — tuned for the demands of growth. When to actually switch? Small breeds (under 20 lb) at 8-12 months; medium breeds (20-50 lb) around 12 months; large breeds (50+ lb) at 12-15 months; giant breeds at 18-24 months.

📚 WHERE WE GOT ALL THIS

Every number and recommendation above comes from one of these sources. Tap any (▼) citation throughout the page to see the original wording. Full source documents are linked below.

MERCK — Merck Veterinary Manual ↗The Merck Veterinary Manual (published as MSD Veterinary Manual outside the U.S. and Canada) is a free, comprehensive veterinary reference used by veterinarians, students, and pet owners worldwide. Its nutrition chapters are authored by named board-certified veterinary nutritionists.
AAFCO — Association of American Feed Control Officials ↗AAFCO is a non-profit organization of U.S. state and federal feed-control officials that develops model regulations and nutrient profiles for pet food. Every dog food sold in the U.S. must meet AAFCO's standards to be marketed as 'complete and balanced'.
AKC — American Kennel Club ↗The AKC is the largest U.S. registry of purebred dogs and a widely-cited authority on general dog care, breed information, and owner education. Its Chief Veterinary Officer and expert advice column publish nutrition guidance for everyday dog owners.
FDA — U.S. Food and Drug Administration ↗The FDA is the U.S. federal agency that regulates food and drug safety, including pet food. Its Center for Veterinary Medicine publishes safety alerts about ingredients and household items toxic to pets.
PMC — PubMed Central (NIH) ↗PubMed Central is a free archive of peer-reviewed biomedical and life-sciences research curated by the U.S. National Library of Medicine (NIH). Papers cited here are open-access primary sources.

Last verified: 2026-05-23

❤️ A friendly reminder: this is general guidance, not a custom plan for your dog.

The plan above reflects what the Merck Veterinary Manual, AAFCO, AKC, and the FDA publish for dogs matching your St. Bernard's breed, age, weight, and life stage. But every dog is different — habits, digestion, and individual quirks aren't in our data.

If something seems off, or you just want a second opinion, your vet is the right call. We've put together some talking points below to make that conversation easier ↓

🩺 QUESTIONS TO BRING TO YOUR VET

Save or print this list and bring it to your next visit.

❓ “What body condition score is my St. Bernard at now, and what's the ideal?”
Why ask: The 1-9 body condition score is the standard vets use to tell if your dog is at a healthy weight.
❓ “Is my St. Bernard puppy's growth rate on track?”
Why ask: Large breeds are sensitive to growing too fast. Your vet can compare current weight to the expected range for this age.
❓ “When should we transition from puppy to adult food?”
Why ask: For large breeds the transition can be later than 12 months — your vet can advise based on actual growth.
❓ “Are there breed-specific screenings or watches for St. Bernards at this age?”
Why ask: St. Bernards have known breed traits worth monitoring — your vet may suggest preventive screening based on age and lineage.

St. Bernard feeding — common questions

How much should I feed an adult St. Bernard?: A healthy adult St. Bernard (about 120–180 lb) needs roughly 2,250–3,150 calories a day — about 6½ to 9 cups of dry food, split into two meals. The exact cups depend on your food's kcal per cup (check the bag); see the adult row matching your dog's weight.
How many times a day should a St. Bernard eat?: Two measured meals a day for adults — not one large bowl. AKC lists St. Bernards among the large- and giant-breed dogs at greatest risk of bloat, and feeding two measured meals rather than one large bowl is the standard precaution. Slowing the dog down with a slow-feeder bowl helps too. Growing puppies eat 3–4 smaller meals.
How much should I feed a St. Bernard puppy?: A St. Bernard puppy under 4 months is fed about 3× its resting energy needs across 3–4 small meals a day; from 4 months it steps down toward 2× across 3 meals. Find your puppy's current weight in the puppy rows of the chart above for an estimated daily amount, and confirm with your vet — giant-breed puppies do better on slow, steady growth than fast.
When should a St. Bernard switch from puppy to adult food?: Around 24 months — much later than smaller breeds. Giant breeds like St. Bernards keep growing for nearly two years, and switching too early can rush growth in a way that affects long-term joint and frame health. Your vet can confirm timing based on your dog's actual growth.
How do I know if my St. Bernard is overweight?: A general body-condition check: you should be able to feel the ribs without pressing through fat, with a clear waist tuck behind the ribcage. St. Bernards are large and heavily-coated, so the coat can hide a thickening waist — use your hands, not just your eyes.
Why is bloat a worry for St. Bernards?: AKC lists St. Bernards specifically among the large- and giant-breed dogs at greatest risk of bloat (gastric dilatation-volvulus), a fast-moving, life-threatening condition. Practical risk-reduction levers: two measured meals a day rather than one large bowl, slowing the dog down with a slow-feeder bowl, and avoiding heavy exercise right after eating.