Dog Calorie Calculator By Weight or By Breed · How Many Calories a Dog Needs
Work out exactly how many calories your dog needs per day using the veterinary RER and MER formulas. Choose your dog’s weight or breed, life stage, activity level and body condition, then turn the result into cups and grams of food.
By Manzoor Ahmad · Updated October 18, 2026
Enter your dog’s current weight. Results update as you type.
Food details (for cups and grams)
Daily calories needed
—kcal/day
Enter your dog’s details.
Your dog’s energy multiplier (MER factor)
—
Feeding plan
How many calories does a dog need per day?
A typical spayed or neutered adult dog needs about 1.4–1.6 × its Resting Energy Requirement (RER), where RER = 70 × (body weight in kg)0.75. In practice that’s roughly 300–330 kcal for a 10 lb dog, 740 kcal for a 30 lb dog, 1,100 kcal for a 50 lb dog and 1,400 kcal for a 70 lb dog. Puppies, intact, active, pregnant and nursing dogs need more. Inactive, senior and overweight dogs need less.
Key facts at a glance
- RER (Resting Energy Requirement) is the energy a dog burns at rest: 70 × kg0.75.
- MER (Maintenance Energy Requirement) = RER × a life-stage factor (AAHA 2021).
- Puppies under 4 months need 3 × RER. From 4 months to adulthood they need 2 × RER.
- Weight loss is planned at 1.0 × RER of the ideal weight, not the current weight.
- Treats should be no more than about 10% of daily calories.
- Every formula is a starting point. Weigh your dog every 2–4 weeks and adjust by about 10%.
Dog calorie calculator by weight: daily calorie chart
Daily calories for common weights, calculated from the AAHA life-stage factors. Use the calculator above for your dog’s exact numbers.
| Dog weight | RER | Weight loss* | Neutered adult (1.5) | Intact adult (1.7) | Active (2.0) | Puppy <4 mo (3.0) |
|---|---|---|---|---|---|---|
| 5 lb (2.3 kg) | 130 | 130 | 195 | 220 | 260 | 390 |
| 10 lb (4.5 kg) | 220 | 220 | 325 | 370 | 435 | 655 |
| 15 lb (6.8 kg) | 295 | 295 | 440 | 500 | 590 | 885 |
| 20 lb (9.1 kg) | 365 | 365 | 550 | 620 | 730 | 1100 |
| 25 lb (11.3 kg) | 435 | 435 | 650 | 735 | 865 | 1300 |
| 30 lb (13.6 kg) | 495 | 495 | 745 | 845 | 990 | 1490 |
| 40 lb (18.1 kg) | 615 | 615 | 925 | 1045 | 1230 | 1845 |
| 50 lb (22.7 kg) | 725 | 725 | 1090 | 1235 | 1455 | 2180 |
| 60 lb (27.2 kg) | 835 | 835 | 1250 | 1420 | 1670 | 2500 |
| 70 lb (31.8 kg) | 935 | 935 | 1405 | 1590 | 1875 | 2810 |
| 80 lb (36.3 kg) | 1035 | 1035 | 1550 | 1760 | 2070 | 3105 |
| 90 lb (40.8 kg) | 1130 | 1130 | 1695 | 1920 | 2260 | 3390 |
| 100 lb (45.4 kg) | 1225 | 1225 | 1835 | 2080 | 2445 | 3670 |
| 120 lb (54.4 kg) | 1405 | 1405 | 2105 | 2385 | 2805 | 4210 |
| 150 lb (68.0 kg) | 1660 | 1660 | 2485 | 2820 | 3315 | 4975 |
*Weight loss calories apply to the dog’s ideal weight, not current weight. For example, a 60 lb dog whose ideal weight is 50 lb should use the 50 lb row.
Dog calorie calculator by breed: calories per day for 40 popular breeds
Breed tells you the typical adult size, and size drives calorie needs. Ranges below run from the light end of the breed standard at 1.4 × RER to the heavy end at 1.6 × RER for neutered adults, and 1.8–2.0 × RER for active adults. Pick your breed in the calculator’s By breed tab to personalize it.
| Breed | Adult weight | Neutered adult kcal/day | Active adult kcal/day | Energy tendency |
|---|---|---|---|---|
| American Pit Bull Terrier | 30–65 lb | 690–1420 kcal | 890–1770 kcal | Moderate |
| Australian Shepherd | 40–65 lb | 860–1420 kcal | 1110–1770 kcal | High energy |
| Basset Hound | 40–65 lb | 860–1420 kcal | 1110–1770 kcal | Lower energy |
| Beagle | 20–30 lb | 510–790 kcal | 660–990 kcal | Moderate |
| Belgian Malinois | 40–80 lb | 860–1660 kcal | 1110–2070 kcal | High energy |
| Bernese Mountain Dog | 70–115 lb | 1310–2170 kcal | 1690–2720 kcal | Moderate |
| Border Collie | 30–55 lb | 690–1250 kcal | 890–1560 kcal | High energy |
| Boston Terrier | 12–25 lb | 350–690 kcal | 450–870 kcal | Moderate |
| Boxer | 50–80 lb | 1020–1660 kcal | 1310–2070 kcal | High energy |
| Bulldog | 40–50 lb | 860–1160 kcal | 1110–1450 kcal | Lower energy |
| Cavalier King Charles Spaniel | 13–18 lb | 370–540 kcal | 480–680 kcal | Moderate |
| Chihuahua | 2–6 lb | 90–240 kcal | 120–300 kcal | Moderate |
| Cocker Spaniel (American) | 20–30 lb | 510–790 kcal | 660–990 kcal | Moderate |
| Dachshund (Miniature) | 8–11 lb | 260–370 kcal | 330–470 kcal | Moderate |
| Dachshund (Standard) | 16–32 lb | 430–830 kcal | 560–1040 kcal | Moderate |
| Doberman Pinscher | 60–100 lb | 1170–1960 kcal | 1500–2450 kcal | High energy |
| English Mastiff | 120–230 lb | 1960–3660 kcal | 2520–4570 kcal | Lower energy |
| French Bulldog | 16–28 lb | 430–750 kcal | 560–940 kcal | Lower energy |
| German Shepherd | 50–90 lb | 1020–1810 kcal | 1310–2260 kcal | High energy |
| German Shorthaired Pointer | 45–70 lb | 940–1500 kcal | 1210–1870 kcal | High energy |
| Golden Retriever | 55–75 lb | 1090–1580 kcal | 1410–1970 kcal | Moderate |
| Great Dane | 110–175 lb | 1840–2980 kcal | 2370–3720 kcal | Moderate |
| Greyhound | 60–70 lb | 1170–1500 kcal | 1500–1870 kcal | Moderate |
| Havanese | 7–13 lb | 230–420 kcal | 300–530 kcal | Moderate |
| Jack Russell Terrier | 13–17 lb | 370–520 kcal | 480–650 kcal | High energy |
| Labrador Retriever | 55–80 lb | 1090–1660 kcal | 1410–2070 kcal | Moderate |
| Maltese | 4–7 lb | 150–270 kcal | 200–330 kcal | Moderate |
| Miniature Schnauzer | 11–20 lb | 330–590 kcal | 420–730 kcal | Moderate |
| Newfoundland | 100–150 lb | 1710–2650 kcal | 2200–3320 kcal | Lower energy |
| Pembroke Welsh Corgi | 24–30 lb | 590–790 kcal | 760–990 kcal | Moderate |
| Pomeranian | 3–7 lb | 120–270 kcal | 160–330 kcal | Moderate |
| Poodle (Miniature) | 10–15 lb | 300–470 kcal | 390–590 kcal | Moderate |
| Poodle (Standard) | 40–70 lb | 860–1500 kcal | 1110–1870 kcal | Moderate |
| Poodle (Toy) | 4–6 lb | 150–240 kcal | 200–300 kcal | Moderate |
| Pug | 14–18 lb | 390–540 kcal | 500–680 kcal | Lower energy |
| Rottweiler | 80–135 lb | 1450–2450 kcal | 1860–3060 kcal | Moderate |
| Shiba Inu | 17–23 lb | 450–650 kcal | 580–810 kcal | Moderate |
| Shih Tzu | 9–16 lb | 280–500 kcal | 360–620 kcal | Lower energy |
| Siberian Husky | 35–60 lb | 780–1330 kcal | 1000–1670 kcal | High energy |
| Yorkshire Terrier | 4–7 lb | 150–270 kcal | 200–330 kcal | Moderate |
Weights are approximate breed-standard ranges. Individual dogs, and especially mixed breeds, vary, so use your own dog’s weight and body condition for an accurate result.
How to use this dog calorie calculator
- Pick “By weight” or “By breed”. Breed mode fills in a typical adult weight and suggests an activity level. You can always edit both.
- Choose life stage and activity. Puppies, pregnancy and nursing use their own factors. Adults and seniors adjust for activity and spay/neuter status.
- Set the body condition score. At 6 or above, the calculator switches to a weight-loss plan based on an estimated ideal weight.
- Enter your food’s calories. Copy “kcal per cup” from the bag to get cups and grams per day, already adjusted for treats.
The dog calorie formula: RER and MER explained
Veterinary nutritionists estimate calorie needs in two steps. First they calculate the Resting Energy Requirement (RER), the calories needed for basic body functions at rest. Then they multiply it by a life-stage factor to get the Maintenance Energy Requirement (MER), the calories needed for a normal day.
RER (kcal/day) = 70 × (body weight in kg)^0.75
MER (kcal/day) = RER × life-stage factor
Cups per day = MER × 0.9 (if treats) ÷ kcal per cup
Why the 0.75 exponent? Energy needs scale with metabolic body size, not straight body weight. A 60 lb dog doesn’t need six times the calories of a 10 lb dog. It needs about 3.8 times as many. That’s why simple “calories per pound” rules overfeed big dogs and underfeed small ones.
Calorie factors by life stage and activity (AAHA 2021)
| Dog | MER factor | Notes |
|---|---|---|
| Neutered adult | 1.4–1.6 × RER | Most pet dogs |
| Intact adult | 1.6–1.8 × RER | Not spayed or neutered |
| Inactive / obesity-prone | 1.0–1.2 × RER | Couch dogs, many seniors |
| Weight loss | 1.0 × RER (ideal weight) | Under veterinary guidance |
| Puppy under 4 months | 3.0 × RER | Split into 3–4 meals |
| Puppy 4 months to adult | 2.0 × RER | Large and giant breeds grow until 12–24 months |
| Pregnancy, last 21 days | 3.0 × RER | Earlier weeks: intact adult level |
| Nursing (lactation) | 3.0 to 6.0+ × RER | Rises with litter size and peaks around weeks 3–4 |
| Working dog | Light 1.6–2.0 · Moderate 2.0–5.0 · Heavy 5.0–11.0 | Sled dogs sit at the very top |
If your dog is expecting, the dog pregnancy calculator shows exactly when the last three weeks begin, which is when her calorie needs jump. For senior dogs, the dog age calculator helps you judge which life stage to choose.
How many calories should a dog eat to lose weight?
For weight loss, vets calculate calories from the dog’s ideal body weight, typically at 1.0 × RER. A common clinical rule of thumb is that each body-condition point above 5 (on the 9-point scale) is about 10% extra body weight. A dog at BCS 7 weighing 66 lb has an ideal weight of roughly 55 lb, so its weight-loss target is about 1.0 × RER(25 kg), or roughly 790 kcal/day.
Go slow
Aim for a gradual loss (many vets target around 1–2% of body weight per week). Crash diets risk muscle loss and nutrient gaps.
Use a weight-loss food
Cutting a regular food sharply can under-supply protein, vitamins and minerals. Therapeutic diets are designed for calorie restriction.
Count every treat
Chews, table scraps and training treats add up quickly. Keep treats under 10%, or use part of the daily kibble as rewards.
For a full weekly plan and timeline, use the dog weight loss calculator, or find a realistic target first with the dog ideal weight calculator.
Worked example: a 30 lb neutered adult with normal activity
- Weight: 30 lb ÷ 2.2046 = 13.6 kg.
- RER: 70 × 13.60.75 ≈ 496 kcal/day.
- MER: 496 × 1.5 (neutered adult) ≈ 744 kcal/day, with a range of about 690–790 kcal.
- Food: reserve 10% (74 kcal) for treats, leaving 670 kcal ÷ 350 kcal per cup ≈ 1.9 cups per day, split into 2 meals.
These are the calculator’s default values, so you can check every step.
A pharmacist’s notes on calories, treats and supplements
- Supplements carry calories too. Fish oil, peanut-butter pill pockets and chewable joint supplements can add 20–100 kcal a day. Count them in the treat budget.
- Medications change appetite and weight. Steroids like prednisone increase hunger, and some seizure and thyroid medicines affect weight. Recheck calories with your vet after any long-term prescription starts.
- Hypothyroidism and Cushing’s can cause weight gain even on the right calories. If your dog gains on a measured diet, ask your vet about bloodwork.
- Never use human foods with xylitol (some peanut butters and sugar-free treats) as low-calorie rewards. Xylitol is toxic to dogs.
- Watch seasoned leftovers used as “healthy” toppers. Onion and garlic are harmful, as the onion and garlic toxicity calculator explains.
Related dog nutrition and health tools
Calories are step one. These tools cover the next questions dog owners usually ask:
Dog calorie calculator FAQs
Multiply the Resting Energy Requirement (70 × body weight in kg0.75) by a life-stage factor. Most neutered adults need 1.4–1.6 × RER, which is about 740 kcal for a 30 lb dog and 1,100 kcal for a 50 lb dog.
Convert pounds to kilograms (divide by 2.2), raise the result to the power of 0.75, multiply by 70 to get RER, then multiply by the factor for your dog’s life stage and activity. The calculator above does all of this instantly.
Mostly through size. Breed sets a typical adult weight, and weight drives RER. Some breeds also tend to be more active, such as Border Collies and Huskies, or less active, such as Bulldogs and Basset Hounds. Treat breed as a starting point and adjust to your individual dog.
About 3 × RER until 4 months of age, then about 2 × RER until adult size. Large and giant breeds keep growing until 12–24 months and benefit from controlled, steady growth.
Typically 1.0 × RER calculated from the ideal weight, not the current weight. Lose weight gradually, use a complete weight-loss diet, and recheck weight every 2–4 weeks with your vet.
Yes. Spayed and neutered adults generally need about 1.4–1.6 × RER, compared with 1.6–1.8 × RER for intact dogs. That’s one reason dogs often gain weight after surgery if portions don’t change.
During the first 6 weeks of pregnancy, about the same as an intact adult. In the last 3 weeks, about 3 × RER. Nursing can require 3 to 6 or more times RER depending on litter size, peaking around weeks 3–4 of lactation.
Usually less than younger adults because activity and muscle mass decline, often close to the inactive range of 1.0–1.4 × RER. Some very old or ill dogs lose weight and need more, so watch body condition.
Find “kcal per cup” on the food label (often 300–450 for dry food). Divide the daily food calories by that number. For example, 670 kcal ÷ 350 kcal per cup is about 1.9 cups per day.
No more than about 10% of daily calories. The calculator reserves that 10% automatically and reduces the food amount to match.
Bag guides are averages for broad weight bands and often assume an active, intact dog. They can overfeed many neutered pet dogs by 10–25%. Start with a calculated target and adjust based on weigh-ins.
It’s a well-established starting estimate, but individual dogs can differ by 20% or more. Weigh your dog every 2–4 weeks, check body condition, and adjust portions by about 10% at a time.
Manzoor Ahmad
Pharmacist & health writer · 13+ years of web development and SEO experience
Manzoor is a pharmacist with more than nine years of experience writing evidence-based health, nutrition and supplement content. He builds every dexocalc pet calculator from primary veterinary references. The RER formula and life-stage factors in this tool follow the 2021 AAHA Nutrition and Weight Management Guidelines, alongside the WSAVA global nutrition toolkit. This calculator gives a starting point for feeding. It does not replace advice from your veterinarian.
Sources
Disclaimer: This dog calorie calculator gives educational estimates based on published veterinary formulas. Individual needs vary with breed, metabolism, health, environment and food. Use the result as a starting point, monitor your dog’s weight and body condition, and consult your veterinarian, especially for puppies, pregnant or nursing dogs, and dogs with medical conditions or on weight-loss plans.