How much should your dog actually eat? Get a daily portion based on weight, age, and activity in seconds.
Most people feed their dog wrong. Not badly, just wrong amounts. They eyeball a scoop, fill the bowl, and trust that the dog knows when to stop. Dogs do not know when to stop. That's how more than half of dogs in the US end up overweight, which quietly shortens their lives and drives up vet bills for joint disease and diabetes down the road.
The calculator above uses the standard veterinary formula. It starts with your dog's resting energy needs based on body weight, then adjusts for life stage and activity. A working farm dog and a senior couch companion of the same weight need wildly different amounts. The number it gives you is a starting point, not gospel. Watch your dog's body over a few weeks and adjust.
Here's the trick vets use. Run your hands along your dog's ribs. You should feel them easily, like the back of your hand, without pressing. Then look down at your dog from above. You should see a waist tucking in behind the ribs. No felt ribs and no waist means too much food. Ribs sticking out sharply means too little. This hands-on check tells you more than any chart, because it responds to your actual dog rather than an average.
| Dog Weight | Approx Daily Cups | Daily Calories |
|---|---|---|
| 10 lbs | 0.5 - 1 cup | 200 - 275 |
| 20 lbs | 1 - 1.5 cups | 325 - 450 |
| 30 lbs | 1.5 - 2 cups | 450 - 600 |
| 50 lbs | 2.5 - 3 cups | 700 - 900 |
| 70 lbs | 3 - 4 cups | 900 - 1,100 |
| 90 lbs | 4 - 5 cups | 1,100 - 1,350 |
These assume an average activity adult dog on standard dry food. Puppies need more per pound because they're growing. Seniors usually need less because they slow down. And the food itself matters, since calorie density per cup varies a lot between brands. Always cross-check against your bag's feeding guide and your vet's advice, especially if your dog has a health condition.
Keeping your dog at a healthy weight is genuinely one of the best things you can do for their lifespan, and it also keeps vet costs down. Overweight dogs face higher rates of the exact conditions that lead to expensive treatment, like joint disease, diabetes, and heart problems. If you want to understand what those conditions can cost, our vet cost estimator lays it out, and our guide to dog lifespans covers how weight and care affect how long dogs live.
Good food prevents some problems, but not all. See what pet insurance would cost for your dog in 30 seconds.
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