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Dog Nutrition

How to Measure Dog Food Portions Based on Breed Size & Weight

Kit Copson
By Kit Copson · Reviewed & fact-checked by Dr. Maxbetter VizelbergVet Approved
Dr. Maxbetter Vizelberg
Reviewed & Fact-Checked byDr. Maxbetter VizelbergDVM (Veterinarian)
A native of New Orleans, Louisiana, Maxbetter has been cultivating his interest in veterinary medicine since he's been a kid. From being read Russian children’s stories about “Doctor Aybolit” by his grandmother to interning at the Israeli Wildlife Hospital to working at numerous small animal hospitals, he has thoroughly enjoyed learning about and sharing his love for animals with others over the years. He prides himself on educating others to help give their animals the best possible lives and strives to provide the best medical care to his patients. Outside the clinic, he can be found performing his rap songs at open mics, playing soccer and basketball, and going on hikes with family and friends. He currently practices in New York City.View authorThe information is current and up-to-date in accordance with the latest veterinarian research. Learn more
Updated on June 17, 2026
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measures a portion of dry dog food using an electronic scale

Simple as it may sound, measuring dog food portions accurately is an art. According to a 2019 study, improperly measuring your dog’s food can result in health consequences, including nutritional deficiencies and obesity. Obesity affects around 25–30% of dogs, with a high percentage affecting dogs between 5 and 11 years old.

For these reasons, it’s worth investing a bit of time in learning how to measure dog food portions properly. In this post, we share tips on measuring dry dog food and factors to consider when doing so.

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How Much Should I Feed My Dog? — Factors to Consider

Since dogs come in all shapes and sizes, their portion sizes vary greatly. When deciding how much you should be feeding your dog, you’ll need to consider:

  • How active they are
  • Their body weight
  • Their life stage
  • Their metabolic rate
  • How many meals you’re feeding them per day
  • The type of food they get
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To give you a better idea of how much to feed your dog, we put together this table based on the standard recommended daily feeding amounts with information from PetMD.

PetMD recommends using a standard 8-oz. measuring cup. These measurements are standard estimates and may differ for your specific dog—for example, if your pet is a puppy or adult, if they are reproductively intact or spayed/neutered, or if a vet has put your dog on a special diet due to a health condition or weight issues.

Breed SizeDog’s WeightAmount to Feed per Day
Toy3 lbs.⅓ cup (139 calories)
Toy6 lbs.½ cup (233 calories)
Small10 lbs.¾ cup (342 calories)
Small15 lbs.1 cup (464 calories)
Small20 lbs.1 ⅓  cup (576 calories)
Medium30 lbs.1 ¾ cup (781 calories)
Medium40 lbs.2 ¼ cups (969 calories)
Medium50 lbs.2 ⅔  cups (1,145 calories)
Large60 lbs.3 cups (1,313 calories)
Large70 lbs.3 ½ cups (1,474 calories)
Large80 lbs.3 ¾ cups (1,629 calories)
Large90 lbs.4 ¼ cups (1,779 calories)
Large100 lbs.4 ½ cups (1,926 calories)

If you’re ever uncertain or have doubts about the best food for your dog, a vet is the best person to ask. They’ll be able to recommend brands they trust and consider best for your dog’s needs.

If you have a question about your dog's health or behavior, why not Ask a Vet for free? Our veterinary team answers reader questions and provides trusted advice to help you better understand your dog.

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How to Measure Dog Food Portions

It can be difficult to accurately measure dog food portions because cup sizes, cup types, and scoop sizes vary so much. Our top tip is to read the instructions on your dog’s food bag. If it’s a quality pet food brand, you should find recommendations on the cup size and type to use and a feeding guide so you know how many cups and calories to feed your dog on a daily basis. You can also make use of online dog food calorie calculators. These can be helpful for getting an estimate, though there’s no guarantee that they’ll be 100% accurate.

When measuring the portion in the cup, try your best to keep the food level with the cup’s rim or the appropriate measuring line and avoid going over it. Then, use weighing scales to make sure the amount matches what’s recommended in the feeding guide.

Since it can be tricky to measure portions accurately in a cup, weighing is the best way to ascertain that you’re consistently feeding the same amount every time and adhering to the recommended amount for your dog’s size and weight.

It may be a good idea to measure and weigh your dog’s food in one go first thing in the morning, to save you from having to repeat the process throughout the day. Put the measured-out food into a bag or Tupperware, and split it according to the number of meals that your dog eats per day.

Make sure you're feeding your dog the right amount, check out our dog food calculator here:

The exact amount of calories an individual animal needs to maintain a healthy weight is variable and influenced by many factors including genetics, age, breed, and activity level. This tool is meant to be used only as a guideline for healthy individuals and does not substitute veterinary advice 

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Conclusion

Weighing your dog’s food cup after you’ve measured out a portion is the best way to know for sure that you’re feeding them the correct amount. Always refer to the feeding guide on the food bag to find out the recommended daily amount for your dog. If you have any doubts about how much you should be feeding your dog, talk to a vet or a pet nutritionist, as they will be able to best advise you.

See also:

Sources

Featured Image Credit: O_Lypa, Shutterstock

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Kit Copson
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Kit Copson

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