by James Wu — pet ownerUpdated May 8, 2026

How much should my dog eat to lose weight?

Type in today's weight, tap the body shape, and pick the food's calorie density off the bag. We'll show a daily target sized to where your dog should weigh — plus how long the loss should take.

Current weight

Body shapetap the closest match

Food densityfrom bag label

kcal / cup

Daily calories for safe loss

706kcal / day

Aim for 686–727 kcal a day — less food than maintenance, sized to the 46.2–50 lbtarget weight, not today's weight.

1.9 cupsper day

AM1 cups

PM1 cups

Treat budget — keep it tight

Treats and chews can have up to 71 kcal a day (10% rule). The bowl carries 635 kcal. When calories are tight, the easy quick fix is to spend most of the treat budget on green beans, blueberries, or carrot sticks rather than calorie-dense biscuits.

How long it takes

Losing roughly 12 lb the safe way takes 3–5 months (10–20weeks). If the scale isn't moving after four weeks, re-weigh the food, audit treats, re-check body shape — then loop in your vet before cutting the daily target further. Faster than 2% body weight per week is where dogs start losing muscle, not fat.

Daily calorie target = resting energy at the dog's target weight (AAHA 2021 starting point for safe weight loss). See methodology

AAHA 2021·WSAVA BCS·NRC 2006

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Quick answers about PawsCalculator's calculators and how the numbers work — RER × MER, body condition scoring, food density, life-stage multipliers. Free, no signup. Not veterinary advice — for medical, feeding, or weight-loss decisions about your specific pet, talk to a licensed veterinarian.

Hi, I'm the PawsCalculator assistant. I answer questions about pet calorie, weight, age, and feeding math — and how the calculators on this site work. I'm not a veterinarian and I can't give personal veterinary advice. For weight-loss programs, prescription diets, or age-related illness, talk to a licensed veterinarian.

The one rule everything else hangs on

Feed for the dog you want, not the dog you have. Maintenance calories sized to a 60-pound dog will hold a 60-pound dog at 60 pounds — that's how the weight stuck in the first place. The deficit calculator does one specific thing: it works out the resting calorie need at the target weight, and that becomes the new daily target. Smaller dog, smaller bowl.

For a 60-pound dog at body shape 7, the target weight is around 48 pounds and the daily resting need at that weight is roughly 700 calories. That number is the bowl plus everything else — chews, dental sticks, the bit of cheese on the pill, the crusts from breakfast. All of it counts.

What to actually do for four weeks

Lock the daily total. Use the calculator's mid number as the starting target. Measure the food in cups or grams from the bag — eyeballing portions is where most weight-loss attempts fail. The same dog scoop you used at maintenance probably holds 25 to 40 percent more than you think it does.
Spend the treat budget on filler. Green beans, baby carrots, blueberries, plain pumpkin from the can — bulk that doesn't carry calories. The dog still gets the chew-and-reward experience without burning the daily allowance on three biscuits.
Slow the meals down. Split the day into three or four small meals instead of two. Use a slow-feeder bowl or a snuffle mat. Same total, much less hungry-dog drama in between.
Weigh in once a week. Same day, same time, same scale, before breakfast. Don't weigh daily — hydration and meal timing make the number bounce in ways that aren't real loss.
At week four, look at the scale. If the dog has dropped about 4 percent of starting weight (1 to 2 percent per week × 4 weeks), the plan is working — keep going. If it's flat, don't reach for a smaller bowl yet. Re-weigh the food on a kitchen scale (cup measures drift 25 to 40 percent high), audit every treat and chew that snuck back in, and re-check body condition score against the target weight. Then call the vet before adjusting the daily target — especially for small dogs or already-low calorie targets, where another 10 to 15 percent cut can drop the dog below safe maintenance. The vet decides if the deficit needs trimming, the diet needs swapping, or there's something else (thyroid, joint pain, medication side effect) making the scale stick.

A worked example: the same 60-pound dog

60 pounds, body shape 7, 380-kcal-per-cup kibble. Here's what the calculator hands back and what it means in cups, AM and PM:

Target weight is roughly 46 to 50 pounds. The middle of that range is the practical number.
Daily calorie target is about 700 kcal — resting calories sized to a 48-pound dog, not a 60-pound one.
Bowl portion is roughly 1.9 cups of 380-kcal-per-cup food, split as 0.9 in the morning and 0.9 at night.
Treat allowanceis about 70 calories a day. That's a small handful of blueberries, or one mid-size training treat, not three.
Timeline to target: 3 to 5 months at 1 to 2 percent of body weight per week.

For comparison: the same dog on maintenance calories at its current 60 pounds would be eating roughly 1,140 kcal a day — about 3 cups of the same food. The deficit cuts the bowl down by more than a cup. That's the visible change, and it's the change that actually moves the scale.

What this calculator is not

It's a starting point, not a prescription. Two things this number won't catch: medical reasons your dog put on weight (thyroid issues, joint pain that cut activity, a medication with weight-gain side effects) and food sensitivities that change which diet should carry the calories. If the dog is heavy enough to be on the calculator at body shape 8 or 9, the single most useful thing to do isn't feed less — it's book the vet visit and bring this number in for the conversation.

Vets running formal weight-loss programs sometimes prescribe specific weight-loss foods that are formulated to be filling at lower calories — fiber, protein, and water density tuned specifically for the bowl-feels-bigger problem. That's a better tool for stubborn cases than just smaller portions of the regular food.

Questions worth asking

Why is the daily calorie number so much lower than I'd expect?

Because it's sized to the target weight, not today's weight. A 60-pound dog at body shape 7 should weigh closer to 48 pounds — and a 48-pound dog only needs about 700 calories a day at rest. Feeding 60-pound maintenance calories is what put the weight on; the deficit number is what takes it off. It feels like less because it is less.

Can I cut calories faster to speed things up?

You can, but most vets won't recommend it. Faster than 2 percent of body weight per week and dogs start losing muscle along with fat — the metabolism drops, hunger goes up, and the weight comes back as soon as the bowl returns to normal. Slow and steady is the only version that holds. If after a month the scale isn't moving, the right move is not to crash-cut. Re-weigh the food on a kitchen scale (cup measures drift 25 to 40 percent high), audit every treat and chew that's slipping in, and re-check body condition score against the target weight. Then call the vet — especially for small dogs or already-low calorie targets — before adjusting the daily target by another 10 to 15 percent.

What about treats? Do I have to cut them out?

No, but pick them carefully. Vets allow up to 10 percent of daily calories for treats. On a tight loss budget that's not many calories, so a single dental chew or a couple of biscuits eats the whole allowance. Better trade: most of the treat budget goes to green beans, blueberries, baby carrots, or plain pumpkin — high volume, low calories, dogs still feel rewarded. Save the calorie-dense biscuits for the rare training session.

My dog seems hungry on this. What should I do?

Three things help. Spread the same daily calories across three or four small meals instead of two — same total, less hunger. Use a slow-feeder bowl or a snuffle mat to make eating take longer. And add a vet-approved bulk source like green beans or canned pumpkin to the bowl — fills the dog up without adding calories. If hunger is severe and persistent, talk to a vet about prescription weight-loss food, which is formulated to feel more filling at the same calorie count.

Should I weigh my dog every day?

Once a week is plenty. Daily weights bounce around with hydration and meal timing in ways that hide the real trend. Pick the same day, same time of week, same scale — preferably right before a morning meal. Most vets like to see a weigh-in at four weeks and again at eight weeks; if the scale hasn't moved by week four, the daily target gets adjusted down.

Sources

The full verified-source working set with verbatim quotes lives at /methodology. Specific to this calculator:

American Animal Hospital Association. 2021 AAHA Nutrition and Weight Management Guidelines for Dogs and Cats. Source for the rule that weight-loss starting calories are calculated as RER against the dog's ideal body weight, with the safe loss rate at 1–2% of body weight per week. aaha.org 2021-nutrition-weight-management
World Small Animal Veterinary Association (WSAVA). Body Condition Score chart, 9-point system for dogs. Frames the body-shape input that drives the target-weight calculation. wsava.org global-nutrition-guidelines
National Research Council. Nutrient Requirements of Dogs and Cats, 2006. Source for the resting energy formula (RER = 70 × kg^0.75) used to convert target weight into a daily calorie target. nap.nationalacademies.org/catalog/10668
AAHA. "Weight Reduction in the Obese Pet" — clinical reference for the 80%-of-MER-at-ideal feeding pattern, vet-driven re-check at 4 weeks, and the move to prescription weight-loss diets when calorie restriction alone stalls. aaha.org weight-reduction-in-the-obese-pet
WSAVA Global Nutrition Committee. Treat-budget guideline that treats and food rewards stay under 10% of daily calories so the rest of the diet can come from a complete-and-balanced food. wsava.org BCS + Nutrition reference (PDF)

Sister calculators that plug into this same engine: the dog ideal weight calculator (find the target) and the dog calorie calculator (maintenance feeding once the dog is at target).