How Much Should I Feed My Dog? Daily Guide by Weight & Age
Complete guide to dog feeding portions. Learn how many calories and cups your dog needs daily based on weight, age, and activity level.
One of the most common questions every dog owner asks: how much food does my dog actually need? Bag instructions are vague, vets give general advice, and most dog parents end up guessing — which is why over half of dogs in the US are now overweight.
Here's the good news: there's a simple, science-based formula vets use to calculate exact daily calorie needs. Let's break it down.
The Formula Vets Actually Use
Veterinary nutritionists calculate dog feeding amounts using two key numbers: RER (Resting Energy Requirement) and DER (Daily Energy Requirement).
Step 1: Calculate RER (calories needed at rest)
RER (kcal) = 70 × (weight in kg)^0.75
Step 2: Multiply by activity factor for DER
- • Puppy under 4 months: × 3.0
- • Puppy 4–12 months: × 2.0
- • Active adult: × 2.0
- • Normal adult: × 1.6
- • Senior / inactive: × 1.2–1.4
- • Weight loss: × 1.0
This gives you the daily calories your dog needs. Divide by the calories per cup on your dog food bag (usually 300–450 kcal/cup) to get cups per day.
Skip the math — use our calculator
Enter your dog's weight and activity level. Get exact daily calories and cups instantly.
Open Dog Food CalculatorQuick Reference: Daily Food by Weight
Here's a rough guide assuming an average adult dog with normal activity (×1.6 factor) and 380 kcal/cup dry food:
| Dog Weight | Daily Calories | Cups/Day |
|---|---|---|
| 5 kg / 11 lbs | 335 kcal | ~0.9 cups |
| 10 kg / 22 lbs | 565 kcal | ~1.5 cups |
| 15 kg / 33 lbs | 765 kcal | ~2.0 cups |
| 25 kg / 55 lbs | 1,125 kcal | ~3.0 cups |
| 35 kg / 77 lbs | 1,460 kcal | ~3.8 cups |
| 50 kg / 110 lbs | 1,940 kcal | ~5.1 cups |
Note: These are estimates. Actual needs vary by metabolism, breed, health, and food calorie density. Always check your specific food.
How Often Should You Feed?
- Puppies under 4 months: 4 small meals per day. Their stomachs are tiny, their growth is rapid, and they need consistent fuel.
- Puppies 4–12 months: 3 meals per day.
- Adult dogs: 2 meals per day — morning and evening, ideally 8–12 hours apart.
- Senior dogs: 2 smaller meals or 3 small meals if they have digestive issues.
Avoid free-feeding(leaving food out all day). It's the #1 cause of overweight dogs because they snack out of boredom rather than hunger.
Wet vs Dry vs Mixed
Calorie content varies hugely between food types:
- Dry kibble: 300–500 kcal/cup (calorie-dense, easy to portion, good for teeth)
- Wet food: 70–120 kcal per 3 oz can (water-rich, palatable, good for hydration)
- Raw / fresh: Varies widely; check brand labels (mimics natural diet but expensive)
Many vets recommend a mix of dry and wet: 70% dry kibble for calorie density and dental health, 30% wet for hydration and protein variety.
5 Signs You're Overfeeding
- 1. You can't feel ribs easily.Run your fingers over your dog's sides — ribs should feel like the back of your hand, not a marshmallow.
- 2. No visible waist from above. Standing over your dog, you should see a clear hourglass shape.
- 3. Belly hangs / sags.A healthy dog's belly tucks up toward the back legs.
- 4. Reluctance to exercise. Overweight dogs slow down on walks, pant heavily, or refuse stairs.
- 5. Food obsession.Constantly begging or eating non-food items can be a sign of overfeeding paradoxically — they crave certain nutrients they're missing.
Special Cases
Pregnant or Nursing Dogs
Pregnant dogs need 25–50% more food in the last trimester, and nursing mothers need 2–3× their normal portions. Switch to puppy formula for the extra protein and calories.
Working / Athletic Dogs
Sled dogs, herders, and working K9s burn 2–4× more calories than pet dogs. Use the active adult ×2.0 factor and adjust based on actual workload.
Dogs on Medication
Steroids, thyroid medication, and other drugs affect appetite and metabolism. Always consult your vet before adjusting portions for a medicated dog.
The Bottom Line
Most dog feeding mistakes come from following bag instructions too literally — they're calibrated for an average dog, but yours might be more or less active. Use the RER formula (or our calculator) to get a personalized number, then adjust based on body condition.
Check your dog's body condition every 2 weeks. If they're gaining weight, reduce by 10%. If they're losing too fast, increase by 10%. Small adjustments work better than big swings.
And remember: treats count too. They're not free calories. 🐾
Frequently Asked Questions
How many cups of food should I feed my dog per day?
It depends on weight and activity. As a rough guide: small dogs (5–10 kg) need 0.5–1.5 cups, medium dogs (10–25 kg) need 1.5–2.5 cups, large dogs (25–40 kg) need 2.5–4 cups, and giant dogs (40+ kg) need 4–6 cups daily — split across two meals.
Should I feed my dog once or twice a day?
Twice a day is recommended for adult dogs (morning and evening). Puppies under 6 months need 3–4 smaller meals. Avoid leaving food out all day (free-feeding) — it leads to weight gain and unpredictable hunger cues.
How do I know if I'm overfeeding my dog?
Run your hands over your dog's ribs. You should feel them easily without pressing hard. Looking from above, you should see a clear waist behind the ribs. From the side, the belly should tuck up. If ribs are hard to find, your dog is overweight.
Should I include treats in my dog's daily calorie count?
Yes — treats should not exceed 10% of total daily calories. If your dog needs 700 kcal/day, cap treats at 70 kcal. If your dog gets a lot of treats during training, reduce regular meal portions accordingly.
How much should I feed a senior dog vs adult dog?
Senior dogs (7+ years for large breeds, 10+ for small) typically need 20–30% fewer calories than active adults due to slower metabolism. Reduce portions and switch to a senior-formula food with joint support.