Senior Dog Feeding Chart: How Much to Feed by Weight and Age
Senior dog feeding chart with daily calories and cups of kibble by body weight from 5 to 120 lbs, plus adjustments for weight loss, activity, and age.
Quick Answer
Most healthy senior dogs need about 1.2 to 1.4 times their Resting Energy Requirement (RER) per day, which works out to roughly 25 to 30 calories per pound of ideal body weight for a typical less-active senior. A 20 lb senior dog needs around 440 to 510 kcal per day (about 1.2 to 1.4 cups of typical kibble), a 50 lb senior around 875 to 1,020 kcal (2.3 to 2.7 cups), and a 90 lb senior around 1,355 to 1,585 kcal (3.6 to 4.2 cups). Use the full chart below and adjust to your dog's body condition.
Senior Dog Feeding Chart by Weight
The chart below shows daily calorie targets for healthy senior dogs based on the standard veterinary formula: RER = 70 x (body weight in kg)0.75, multiplied by a senior maintenance factor of 1.2 (less active) to 1.4 (moderately active). Cup estimates assume a typical senior kibble at about 375 kcal per cup; always check your bag's kcal-per-cup statement and recalculate.
| Body Weight | RER (kcal/day) | Less Active Senior (kcal/day) | Moderately Active Senior (kcal/day) | Cups of Kibble/Day* |
|---|---|---|---|---|
| 5 lbs | 130 | 155 | 180 | 1/3 to 1/2 |
| 10 lbs | 220 | 260 | 305 | 2/3 to 3/4 |
| 15 lbs | 295 | 355 | 415 | 0.9 to 1.1 |
| 20 lbs | 365 | 440 | 510 | 1.2 to 1.4 |
| 25 lbs | 435 | 520 | 610 | 1.4 to 1.6 |
| 30 lbs | 495 | 595 | 695 | 1.6 to 1.9 |
| 40 lbs | 615 | 740 | 860 | 2.0 to 2.3 |
| 50 lbs | 730 | 875 | 1,020 | 2.3 to 2.7 |
| 60 lbs | 835 | 1,000 | 1,170 | 2.7 to 3.1 |
| 70 lbs | 935 | 1,125 | 1,310 | 3.0 to 3.5 |
| 80 lbs | 1,035 | 1,240 | 1,450 | 3.3 to 3.9 |
| 90 lbs | 1,130 | 1,355 | 1,585 | 3.6 to 4.2 |
| 100 lbs | 1,225 | 1,470 | 1,715 | 3.9 to 4.6 |
| 120 lbs | 1,400 | 1,680 | 1,965 | 4.5 to 5.2 |
*Cup estimates assume 375 kcal per cup of dry food and include all daily food. Split into two meals and subtract treat calories. Use your dog's ideal body weight, not their current weight, if they are overweight.
Want a personalized number instead of a range? Our senior dog food calculator does the RER math for your dog's exact weight, and our guide on how much to feed a senior dog walks through portion control step by step.
Portion Control Tools for Senior Dogs
FAFAFLYER Dog Food Measuring Cup
Stainless scoop with printed scale lines for consistent portions
Purina ONE Senior Dog Food with Joint Support
Senior formula with published kcal per cup for easy math
Senior Metabolic Adjustments
Age changes the math. Most dogs need about 20 percent fewer calories once activity and metabolism slow, but very old dogs often flip the other way and struggle to hold weight. Use the base chart above, then apply the adjustment that fits your dog's situation.
| Situation | Feeding Factor | What It Means |
|---|---|---|
| Healthy, less active senior | 1.2 x RER | The default starting point for most seniors; matches the "Less Active" column above |
| Healthy, still active senior | 1.4 x RER | For seniors who still get daily walks and play; matches the "Moderately Active" column |
| Overweight, needs weight loss | 1.0 x RER of ideal weight | Feed for the target weight, not the current weight, under veterinary supervision |
| Underweight or losing muscle | 1.4 to 1.6 x RER | Increase gradually; sudden weight loss in a senior warrants a vet visit first |
| Spayed/neutered, gains easily | Low end of range | Start at 1.2 x RER and reassess with monthly weigh-ins |
| Kidney, liver, heart, or thyroid disease | Vet-directed | Therapeutic diets change both calories and nutrient profiles; follow your vet's plan |
If your senior is carrying extra pounds, our guides on weight management for older dogs and the best senior dog food for weight loss cover how to trim safely. If they are losing weight without trying, read why old dogs lose weight before feeding more.
Calories Per Cup Vary More Than You Think
Two senior kibbles can differ by 100 or more calories per cup, which means the same scoop can overfeed one dog and underfeed another. Always find the calorie content statement on the label before using any cup-based chart.
| Food Type | Typical Calorie Density | Feeding Note |
|---|---|---|
| Dry senior kibble | 325 to 450 kcal per cup | Weight-management formulas sit at the low end, performance formulas at the high end |
| Wet food (13 oz can) | 300 to 450 kcal per can | Great for hydration and dental issues; see our wet food guide |
| Wet food (3.5 oz can) | 80 to 120 kcal per can | Often used as a topper; count it toward the daily total |
| Fresh/gently cooked diets | Portioned by the maker | Usually pre-portioned to your dog's calorie target; verify the target is senior-appropriate |
| Treats and chews | 10 to 100+ kcal each | Keep all extras at or under 10 percent of daily calories |
How to Use This Chart Day to Day
- Find your dog's ideal weight row. Ask your vet for a body condition score if you are not sure whether your dog is at a healthy weight.
- Pick the activity column that matches your dog's real routine, not the routine you wish they had.
- Convert calories to portions using the kcal-per-cup number on your food's label, then split into two meals. A gram scale beats a measuring cup for accuracy because scoop-to-scoop variation runs 10 to 20 percent.
- Subtract treat calories from the meal allowance.
- Weigh your dog monthly and adjust portions by about 10 percent if weight drifts. A consistent feeding schedule makes changes easier to evaluate.
Appetite changes in seniors are worth taking seriously in both directions. A dog that suddenly wants much more food, or one that walks away from meals, may have a medical issue. See our guides on senior dogs not eating and common senior dog health problems, and check baseline health numbers against our senior dog vital signs chart.
Pet Insurance · Sponsored
Protect Your Senior Dog From Surprise Vet Bills
Senior dogs are more likely to face arthritis, lumps, dental disease, and sudden emergencies, and a single visit can run into the hundreds or thousands. Pet insurance can help you say yes to the care your dog needs without draining your savings. Get a free quote and see what coverage fits.
Frequently Asked Questions
How many calories does a senior dog need per day?
Most healthy senior dogs need roughly 1.2 to 1.4 times their Resting Energy Requirement (RER) per day. In practical terms that is about 25 to 30 calories per pound of ideal body weight for a typical less-active senior. A 20-pound senior dog usually needs around 440 to 510 calories daily, a 50-pound senior around 875 to 1,020 calories, and a 100-pound senior around 1,470 to 1,715 calories. Individual needs vary, so confirm targets with your veterinarian.
How many cups of food should I feed my senior dog?
It depends on the calorie density of your food, which is printed on the bag as kcal per cup. Using a typical senior kibble at about 375 kcal per cup, a 20-pound senior dog needs roughly 1.2 to 1.4 cups per day, a 50-pound dog about 2.3 to 2.7 cups, and an 80-pound dog about 3.3 to 3.9 cups, split into two meals. Always recalculate when you switch foods because kcal per cup can vary from about 325 to 450.
Do senior dogs need fewer calories than adult dogs?
Usually yes. Metabolism and activity both decline with age, and most seniors need about 20 percent fewer calories than they did as active adults. However, some geriatric dogs lose weight and muscle and actually need more calories and higher protein. Body condition score and regular weigh-ins matter more than age alone, which is why vet guidance is important.
How much should I feed a senior dog that needs to lose weight?
Weight-loss plans typically feed for the dog's ideal body weight, not their current weight, often starting near 1.0 times RER for the ideal weight. For example, a dog that weighs 60 pounds but should weigh 50 pounds would be fed roughly 730 calories per day to start. Weight loss in older dogs should always be supervised by a veterinarian so muscle is preserved and underlying disease is ruled out.
Should I feed my senior dog once or twice a day?
Twice a day, about 12 hours apart, works best for most senior dogs. It keeps blood sugar and digestion steadier and lowers bloat risk in large breeds compared with one big meal. Some seniors with digestive sensitivity, diabetes, or poor appetite do better with three smaller meals.
How do treats fit into a senior dog feeding chart?
Treats, dental chews, pill pockets, and toppers should stay at or under 10 percent of total daily calories, and the calories they add should be subtracted from meals. For a dog eating 1,000 calories per day, that means no more than 100 calories from extras. A single medium dental chew can be 50 to 100 calories, so extras add up quickly.
Why does my large senior dog need fewer calories per pound than my small dog?
Calorie needs scale with metabolic body weight, not straight body weight. Small dogs have faster metabolisms and need more calories per pound, often 30 to 40, while large and giant breeds may only need 15 to 20 calories per pound. That is why feeding charts based on RER are more accurate than a single calories-per-pound rule.
Need more help with your aging dog?
Browse our guides by topic to find practical solutions.
Wellness Planner — $39