More than half of dogs are overweight, and excess weight shortens lifespan and stresses joints, heart, and organs. Enter your dog's current and target weight and we'll calculate a safe daily calorie target to feed for weight loss — plus a realistic timeline to reach a healthy weight.
Editorially ReviewedThis is the approximate calories per day to feed for gradual weight loss, based on the resting energy needs of your dog's target weight. Feed within this range, count treats inside the total, and re-weigh every few weeks.
Feed for the ideal weight, not the current one.
1–2% of body weight per week.
Keep them inside the daily total.
Confirm the target and rule out causes.
The key principle of canine weight loss is simple: feed for the weight you want, not the weight you have. If you feed an overweight dog the amount needed to maintain its current (too-high) weight, it stays overweight. So we base the target on your dog's ideal weight.
The math has two parts:
For the timeline, we use a safe loss rate of 1–2% of current body weight per week and estimate how many weeks it will take to reach the goal. Start at the lower calorie figure if loss stalls, the higher if your dog is very hungry or losing too fast, and re-weigh every two to four weeks to fine-tune.
"The single most common reason a 'dieting' dog doesn't lose weight isn't metabolism — it's uncounted calories. Measure the food, count the treats, and the math works."
Weight management is one of the highest-impact things you can do for your dog. A landmark lifelong study found that dogs kept lean lived significantly longer than their overweight littermates and developed signs of age-related disease later. Excess weight also worsens arthritis, strains the heart and airways, raises surgical and anesthetic risk, and is linked to a shorter, less comfortable life. Getting your dog to a healthy weight pays off in years and quality of life.
The calculator is only as good as the target you enter. If you're not sure of your dog's ideal weight, your vet can assess body condition score (BCS) — a hands-on 9-point scale — and give you a realistic goal. As a rough guide, at a healthy weight you should be able to feel (not see) the ribs easily with light pressure, see a visible waist from above, and see a tucked-up belly from the side.
| Do this | Instead of this |
|---|---|
| Weigh or measure every portion | Eyeballing a "scoop" |
| Counting treats within the daily total | Treats on top of meals |
| Veggie treats (green beans, carrot) | Calorie-dense biscuits/chews |
| Re-weighing every 2–4 weeks | Guessing whether it's working |
| Gradual loss over months | Crash dieting |
| Extra walks/play for activity | Cutting food alone, drastically |
Feed roughly the resting energy requirement (RER) of your dog's target weight — about 0.8 to 1.0 × RER per day — not the maintenance needs of its current weight.
This calculator does that math and gives a daily range. It's a starting estimate; re-weigh every few weeks, adjust, and confirm the target with your vet.
About 1–2% of body weight per week. Slow and steady preserves muscle and is safer.
Reaching an ideal weight often takes a few months — that's normal and healthy. Crash dieting is never appropriate.
Yes — treats go inside the daily target, not on top of it. Keep them to roughly 10% of calories or less.
Swap calorie-dense treats for low-calorie options like green beans or carrot pieces, and subtract them from the meal allowance.
Usually it's uncounted calories: eyeballed portions, treats, table scraps, or another person feeding extra. Weigh the food and count everything first.
If the calories are truly accurate and there's still no loss after several weeks, see your vet — conditions like hypothyroidism can require medical treatment.
Ask your vet to assess body condition score and set a realistic target. As a rough check, at a healthy weight you can easily feel the ribs, see a waist from above, and see a belly tuck from the side.
You can also estimate conservatively and refine the target with your vet at the next visit.