Dog Food Portion Calculator
Updated
Quick answer
How much food should I feed my dog?
A 30-pound neutered adult dog needs about 790 kcal a day, which is roughly 2 cups of typical 400-kcal kibble. Portions scale with weight and life stage: a 10-pound dog needs about 0.9 cups, a 70-pound dog closer to 3.7. The calculator above uses your food's actual calories from the bag.
| Dog | 10 lb | 30 lb | 50 lb | 90 lb |
|---|---|---|---|---|
| Cups/day | 0.9 | 2.0 | 2.9 | 4.5 |
How much to feed a dog
Portions come from calories: resting energy (70 × weight in kg^0.75) times a life-stage factor1. Neutered adults run at 1.6 × resting needs, intact adults at 1.8, couch specialists at 1.2 to 1.4, and puppies at 2 to 3 times. Divide by your kibble's "kcal ME/cup" and you have cups per day.
The source's own caveat belongs in bold print: individual dogs vary from these estimates by as much as 50%1. Start here, watch waist and ribs for a few weeks, and adjust. The dog calorie calculator shows the calorie half in full detail.
Dog feeding chart: cups by weight
Neutered adults, assuming 400 kcal per cup. Bags range from about 300 to 450 kcal per cup, so check yours; the calculator takes the exact number.
| Weight | kcal/day | Dry food (cups/day) |
|---|---|---|
| 10 lb (5 kg) | 348 | 0.9 |
| 20 lb (9 kg) | 585 | 1.5 |
| 30 lb (14 kg) | 794 | 2.0 |
| 50 lb (23 kg) | 1164 | 2.9 |
| 70 lb (32 kg) | 1498 | 3.7 |
| 90 lb (41 kg) | 1809 | 4.5 |
Feeding a puppy
Puppies eat like construction crews: about 3 × resting energy under 4 months, then 2 × until grown1, always calculated from current weight. Weigh every couple of weeks, re-run the number, and split it over three to four meals under 6 months. Wondering where the growing ends? The puppy weight calculator predicts the adult size.
Cups, cans, and the pound math
Kibble math is easier with two conversions in your pocket: a cup of typical kibble weighs about 4 ounces (so a pound holds about 4 cups), and a 13-oz can of wet food runs around 370 kcal. For bag-lifetime and cost-per-day math, see how many cups in a pound of dog food. And measure with a real dry-measure cup: owners eyeballing portions miss by anywhere from 48% under to 152% over.
How it works
The bowl question is really two questions: how many calories does your dog need, and how many calories are in your food. We answer the first with the standard veterinary formulas and the second straight from your bag, then divide. Everything below is just those two steps with the working shown.
The calorie target uses the standard veterinary formulas13: RER = 70 × (weight in kg)^0.75, then MER = RER × a life-stage factor (neutered 1.6, intact 1.8, inactive 1.2 to 1.4, puppies 2 to 3, pregnancy 1.6 to 2.0, nursing 2 to 6).
The portions divide that target by your food's labeled calories: kcal ME/cup for dry, kcal per can for wet. Mixed mode fixes the cans you choose and fills the remainder with dry.
Professional tools like the Pet Nutrition Alliance calculator2 use the same method; we add the cup-and-can translation and show every step.
Frequently asked questions
How much food should I feed my dog?
Enough calories for their weight and life stage, split into meals. A 30-pound neutered adult needs about 790 kcal a day, which is roughly 2 cups of typical 400-kcal kibble. The calculator does the math for your dog's exact weight and your food's actual calories.
How much should I feed my puppy?
Puppies under 4 months need about 3 times resting energy, and 2 times from 4 months until grown, always based on current weight. Pick the puppy life stage in the calculator and re-run it every couple of weeks; the portion grows with the puppy.
How many cups of dog food are in a pound?
About 4 cups of typical kibble, since a cup weighs close to 4 ounces. Dense kibble runs nearer 3 cups per pound, light kibble up to 5. Our cups-in-a-pound guide covers the bag math and how to make it exact.
How much wet food should I feed my dog?
Divide the daily calorie target by the calories per can: a 13-oz can typically runs around 370 kcal. Pick "Wet food only" or "Mix of both" in the calculator; mixing a can into mostly-dry feeding is a common and perfectly good setup.
How much raw or homemade food should I feed?
The calorie target stays the same; only the food changes. Weigh portions and work from the recipe's calories per 100 g. Homemade diets need a veterinary nutritionist's recipe to be complete, so treat this tool as the calorie half of that conversation.
How many times a day should a dog eat?
Two meals a day suits most adult dogs; split the daily total in half. Puppies under 6 months do better on three or four smaller meals. Deep-chested breeds should never get the whole day in one sitting.
References
- 1.Pet Nutrition Alliance. Calculating Calories Based on Pet Needs (RER/MER factor table). petnutritionalliance.org
- 2.Pet Nutrition Alliance. Calorie Calculator for Cats and Dogs. petnutritionalliance.org
- 3.WSAVA Global Nutrition Committee. Global Nutrition Guidelines. wsava.org
