Most healthy adult dogs need roughly 30 calories per pound of body weight per day for small dogs, dropping toward 20 calories per pound for large dogs – which works out to about 1 cup of typical dry food for a 10-pound dog, 3 cups for a 50-pound dog, and 5 cups for a 100-pound dog. That is a starting point, not a prescription. The right amount depends on your dog’s age, whether they are spayed or neutered, how much they actually move, and the calorie density of the specific food in your bag. Below is the chart, the math behind it, and the one check that matters more than any number.
Dog feeding chart by weight
These figures assume a neutered adult dog with moderate daily activity, eating a dry food at about 375 calories per cup. Check the bag: kibble ranges from roughly 300 to 500 calories per cup, so the same 3 cups can mean 900 or 1,500 calories. Puppies, nursing mothers and working dogs need considerably more.
| Dog weight | Approx. daily calories | Approx. dry food per day |
|---|---|---|
| 5 lb | ~200 kcal | about ½ cup |
| 10 lb | ~350 kcal | about 1 cup |
| 20 lb | ~585 kcal | about 1½ cups |
| 30 lb | ~790 kcal | about 2 cups |
| 40 lb | ~985 kcal | about 2½ cups |
| 50 lb | ~1,165 kcal | about 3 cups |
| 60 lb | ~1,335 kcal | about 3½ cups |
| 70 lb | ~1,500 kcal | about 4 cups |
| 80 lb | ~1,655 kcal | about 4½ cups |
| 100 lb | ~1,955 kcal | about 5¼ cups |
Where those numbers come from
Veterinary nutrition starts with resting energy requirement: 70 × (body weight in kilograms) raised to the power of 0.75. That gives the calories a dog burns doing nothing. You then multiply by an activity factor – commonly about 1.6 for a neutered adult pet dog, 1.8 for an intact one, 2.0 or higher for a genuinely active dog, and 1.2 to 1.4 for a dog who needs to lose weight. The chart above uses the 1.6 factor.
Notice the curve: calorie needs do not double when weight doubles. A 100-pound dog does not eat ten times what a 10-pound dog eats. This is why bag guidelines that scale linearly tend to overfeed big dogs and underfeed small ones.
Adjust for age, neuter status and activity
Puppies need roughly two to three times the adult maintenance calories per pound, and seniors usually need about 20 percent fewer. A few practical adjustments:
Puppies under four months: feed three to four meals a day and follow the calorie guidance on a food formulated for growth. Large-breed puppies need a large-breed growth formula specifically – overfeeding them accelerates skeletal growth in ways that cause joint problems later. Our puppy food guide covers which formulas are built for that.
Spayed or neutered adults: expect a real drop in metabolic rate. Many dogs gain weight in the six months after surgery purely because nobody cut the portion.
Seniors: less muscle, less movement, same appetite. Weigh monthly. If your older dog is also sleeping noticeably more, that is worth a vet conversation, not just a smaller bowl.
Count the treats – this is where most dogs gain weight
Treats and table food should stay under 10 percent of daily calories, and for a small dog that budget disappears fast. A 10-pound dog eating 350 calories a day has a 35-calorie treat allowance. One dental chew can use all of it. One slice of cheese blows past it.
If you train a lot, use the food itself as the reward – measure the daily ration in the morning, use part of it for training, feed the rest in the bowl. Our dog treat guide lists low-calorie options that work for high-repetition training.
The body condition check that beats any chart
Run your hands along your dog’s ribs: you should feel them easily under a thin layer of fat, without pressing, and see a visible waist from above and a tuck from the side. If you have to press to find ribs, cut the daily amount by about 10 percent and re-check in three to four weeks. If ribs and hip bones are sharply visible, increase.
Weigh your dog on the same scale monthly and write it down. A five-pound change in a 40-pound dog is a 12 percent shift – that is significant, and it is invisible day to day.
How many meals a day?
Two meals a day suits most adult dogs; puppies need three or four; one meal a day is generally not recommended for deep-chested breeds. Splitting the ration helps with hunger-related behavior and, in large deep-chested dogs, avoids the very large single meals associated with bloat risk. A slow feeder bowl is worth it for any dog who inhales food, and an automatic feeder keeps portions honest when your schedule is not.
Wet, fresh and raw food
Calories, not volume, are what you match – wet food typically runs far fewer calories per cup than kibble, so the same bowl size means much less food. Fresh subscription services like The Farmer’s Dog and Ollie calculate portions from the profile you enter and ship pre-measured packs, which removes the guesswork but also means the plan is only as accurate as the weight and activity level you gave them. We compared the two in our Farmer’s Dog vs Ollie breakdown, and our best dog food guide covers how brands stack up more broadly.
Frequently asked questions
How much should I feed my dog by weight in cups?
As a rough starting point at 375 calories per cup: about ½ cup for a 5-pound dog, 1 cup at 10 pounds, 1½ cups at 20 pounds, 2 cups at 30 pounds, 3 cups at 50 pounds, 4 cups at 70 pounds, and around 5¼ cups at 100 pounds, split across two meals. Check your bag’s calories per cup and scale accordingly.
Am I feeding my dog too much?
If you cannot easily feel the ribs, there is no visible waist from above, or your dog is steadily gaining on the monthly weigh-in, yes. Reduce by roughly 10 percent and reassess in three to four weeks rather than making a large sudden cut.
Should I follow the feeding guide on the bag?
Use it as an upper bound. Bag guidelines are generous and are written for an average intact, active dog. Most spayed and neutered pet dogs need meaningfully less than the printed amount.
How much should I feed a puppy?
Follow the growth-formula chart on the bag by expected adult weight and age, feed three to four times daily under six months, and weigh weekly. Puppies should look lean, not round.
Does my dog need a different amount in winter?
Only if they are outdoors and working. An indoor dog who walks less in bad weather usually needs slightly fewer calories in winter, not more.
One last thing that has nothing to do with food
Mealtime is the one moment every day you have hands on your dog’s collar. It is a good habit to check the ID tag while you are there – that it is still attached, still legible, still has a number you actually answer. Engraving wears down faster than people expect, and a worn tag is the same as no tag. We make NFC smart ID tags that a finder taps with any phone to reach your pet’s profile, with the contact details engraved on the back as backup, and we are openly biased about ours. If yours is scratched blank, though, any replacement beats it – here is what belongs on the tag.
Get Your Tag
Designer acrylic NFC tags with engraved backup contact info. One tap, any phone, no app for the finder, no subscription ever.
