Dog food runs $15–20 a month for a small dog on kibble, $29–39 for a 50-lb dog, and $130–250 for the same dog on a fresh subscription. The number scales with body weight (calories), food type (density and price), and how honestly you compare prices. Here's the math, by size and food type, with the per-1,000-kcal trick that makes brand comparisons honest.
| Dog weight | Daily kcal (neutered adult) | Budget kibble | Premium kibble | Fresh plan |
|---|---|---|---|---|
| 20 lb | 585 | $15/mo | $20/mo | $60–90/mo |
| 50 lb | 1,164 | $29/mo | $39/mo | $130–200/mo |
| 80 lb | 1,656 | $42/mo | $56/mo | $190–290/mo |
Those kibble figures assume budget food around $1.20/lb and premium around $2.06/lb (a $70 34-lb bag) at 2025–26 national-chain prices. The calorie math is veterinary standard: RER = 70 × kg^0.75, multiplied by 1.6 for a neutered adult — which produces 585 kcal for the 20-lb dog, 1,164 for 50 lb, 1,656 for 80 lb. Intact adults eat ~12% more, seniors ~12% less, puppies 2–3× their RER while growing.
| Category | Typical price | Cost per 1,000 kcal | 50-lb dog/mo |
|---|---|---|---|
| Budget kibble (Dog Chow, Pedigree) | $0.80–1.30/lb | $0.55–0.90 | $20–32 |
| Mid kibble (Purina ONE, Iams) | $1.40–2.00/lb | $0.85–1.30 | $32–40 |
| Premium/vet kibble (Pro Plan, Hill's, Royal Canin) | $2.00–2.75/lb | $1.10–1.50 | $38–53 |
| Canned (13–13.2 oz cans) | $1.80–3.00/lb | $3.25–5.50 | $110–230 |
| Fresh subscription (Farmer's Dog, Ollie) | $4–8/lb | $7–11 | $120–250 |
Read the cost-per-1,000-kcal column: it's the only number in that table you can compare straight across. Canned food costs 3–5× kibble per calorie because you're buying water (cans are ~75% moisture) and packaging; fresh costs 5–8× because you're buying refrigerated meat, vegetables, and cold-chain logistics. None of that is a scam — it's what those products cost to make and move. It's just worth knowing before the subscription trial converts.
Bags lie. A $70 34-lb premium bag next to a $38 31.7-lb budget bag looks like a 2× gap — but the premium food packs about 1,860 kcal/lb against the budget food's 1,452, so the dog eats 21% less of it by weight. Priced per 1,000 kcal: premium $1.11, budget $0.83. The real gap is 1.3×, not 2×.
The method: find kcal/kg on the nutrition panel (printed on every bag legally), divide by 2.205 for kcal/lb, then cost per 1,000 kcal = price per pound ÷ kcal per pound × 1,000. Two minutes with a phone at the shelf settles any comparison — including whether the bulk bag is actually cheaper (usually yes, but sales on smaller bags sometimes win).
Run the 50-lb dog for a 12-year life: budget kibble about $4,200, premium kibble about $5,640, fresh subscription about $24,000. Food is the largest recurring cost of dog ownership after the dog itself, and the spread between honest options is a car-payment-sized decision. The cost-of-owning calculator stacks it against vet care, insurance, and gear for the full picture.
Three levers that actually shrink the bill without downgrading the diet:
Weight and life stage in — cost per day, month, year, and per 1,000 kcal for up to three foods side by side.
Open the Dog Food Cost Calculator →For a typical neutered adult: a 20-lb dog costs about $15/mo on budget kibble and $20/mo on premium; a 50-lb dog about $29 and $39; an 80-lb dog about $42 and $56. Canned food runs $110-230/mo for a 50-lb dog and fresh subscriptions $120-250/mo. Kibble lands between $150-500 a year for most dogs; fresh plans $1,500-3,000.
Fresh subscription plans run roughly 3-5 times premium kibble. On the same 50-lb dog: about $2,008 a year on a $5.50/day fresh plan versus $470 on premium kibble — a $1,537 gap. Over a 12-year life that's an $18,000-plus decision made at the pet store.
Compare cost per 1,000 calories: price per pound divided by kcal per pound, times 1,000. Calorie density runs about 1,450-1,900 kcal/lb across kibbles, so a denser food feeds more days per bag than its sticker suggests. The kcal/kg figure is printed on every bag's nutrition panel — divide by 2.205 to get kcal per pound.
A 50-lb dog eating 1,164 calories a day goes through about 0.63 lb of dense premium kibble daily (19 lb a month) or 0.80 lb of budget kibble (24 lb a month). So a 34-lb premium bag lasts about 7 weeks; a same-weight budget bag about 6. Density, not marketing, decides bag life.
No feeding trial proves a premium diet pays for itself in lower vet bills. What is proven: keeping a dog lean adds roughly 1.8 years of life in lifetime studies, and portion control costs nothing. Buy the food your budget sustains and your vet endorses, measure it, and keep the dog trim — that beats an expensive food overfed into obesity.