Dog Food Math

Dog food calculator

How much should you feed your dog? Enter its weight, shape and activity. See the cups a day.

Look at your dog from above

Which shape is closest? Not sure? Do the 1-minute check.

How active is your dog?

Have the food bag? Make it exact

Feeding chart by weight

Cups a day for a lean adult dog, with a typical dry food. Split it into 2 meals. If your dog carries extra weight, use the calculator above instead. The chart would keep the extra weight on.

Dog's weightCalm or olderDaily walksVery active
5 lb½½¾
10 lb¾11¼
15 lb1¼1¼1¾
20 lb1½1¾2
30 lb22¼2¾
40 lb2½2¾3½
50 lb2¾3¼4
60 lb3¼3¾4¾
70 lb3¾4¼5¼
80 lb44½5¾
90 lb4½56¼
100 lb4¾5½6¾
120 lb5½6¼7¾

Typical dry food: about 360 calories in a level 8 oz cup. Your food can be quite different, so check the bag.

How the calculator works

Vets start with the energy a dog needs at rest. It grows with body weight, but not in a straight line. A 60 lb dog does not need six times what a 10 lb dog needs.

Resting energy = 70 × (weight in kg)0.75

A lean adult dog then needs about 1.4 times that if it is calm or older, 1.6 times with daily walks, and 2 times if it is very active. These are the factors in the AAHA guidelines for neutered adult dogs.

If your dog carries extra weight, the calculator feeds for the healthy weight instead, at 1.0 times. That is the same plan as our dog weight loss calculator.

Why the bag often says more

Feeding charts on bags give a range for a typical dog of each weight. Many pet dogs are neutered and less active, and need the low end of that range or less. If your dog is gaining weight on the bag amount, trust the dog, not the bag.

Measure with a real measuring cup, not a mug or a scoop of unknown size. Better still, weigh one level cup of your food once on a kitchen scale.

How many times a day should a dog eat?

Most adult dogs do well on 2 meals a day, about 8 to 12 hours apart. Split the daily cups between them. Small breeds and dogs with some health problems can do better on 3 smaller meals. Puppies need 3 to 4 meals a day.

Treats count too

Treats should stay under 10% of the day's food. On days with treats, feed a little less at meals. The treat calculator shows how many fit.

Questions

Does this work for puppies?

No. Puppies need up to twice as much for their size while they grow. Follow the puppy food bag and ask your vet.

My dog is not neutered. Does that change it?

Dogs that are not neutered often need about 10% more. Watch the weight and adjust.

Wet food or raw food?

The calculator gives cups of dry food. For wet or raw food, check the calories per can or per pound on the label, or ask your vet.

How do I know the amount is right?

Weigh your dog every 2 weeks. If the weight goes up, feed about 10% less. If it goes down and your dog is already lean, feed about 10% more.

When should I see a vet?

If your dog gains or loses weight without a change in food, drinks a lot more, or seems tired. Some illnesses change how much a dog needs.