Dog Food Cost & Serving Calculator

Estimate your pet’s daily calories, monthly food cost, and how long a bag will last — calculated from live Amazon prices in our dry dog and cat food catalog. Works for cats too.

PetPet weight (lb)Activity levelDaily calories (optional override)Estimated from weight & activity: 1164 kcal/dayFood product (400 dog foods)Food energy density (kcal per kg) — most dry foods: 3,300–4,200

Results

Based on Kibbles 'n Bits at $0.81/lb (31lb bag).

Daily serving: 323 g; 11.4 oz
Daily cost: $0.57
Monthly cost: $17.48; ~30.4 days
One bag lasts: 43 days; 6.2 weeks

View this product →

How this calculator works

Daily calorie need is estimated using the standard Resting Energy Requirement formula RER = 70 × (body weight in kg)^0.75, then multiplied by an activity factor (1.2–2.0 for dogs, 1.0–1.4 for cats). You can override the value if your vet recommends a specific target. Serving size in grams is calculated from daily calories and the food’s energy density (kcal/kg). Cost projections use the live $/lb price from our daily Amazon price snapshot.

Estimates only — always follow your veterinarian’s guidance for your individual pet.

As an Amazon Associate, petfoodprice.com earns from qualifying purchases.