Food budgeting
A cheaper bag does not always mean cheaper feeding.
Compare the same daily energy amount and include both the bag weight and its calorie density.
For a budget comparison, cost per 1,000 kcal = bag price ÷ (bag weight in kg × kcal per kg) × 1,000. Convert pounds to kilograms by multiplying by 0.45359237. Use the calorie content from the actual product label.
| Illustrative product | Bag size | Bag price | Energy density | Cost per 1,000 kcal |
|---|---|---|---|---|
| A | 10 kg | $40 | 3,500 kcal/kg | $1.14 |
| B | 12 kg | $54 | 4,000 kcal/kg | $1.13 |
At an illustrative 1,000 kcal per day, A uses $1.1429 per day, or about $417.14 per 365-day year. B uses $1.125 per day, or about $410.63 per year. B’s bag costs more, yet its cost for this same energy amount is slightly lower. These are invented comparison inputs, not real product claims or a dietary recommendation.
Use the price you actually pay
Separate a first-order discount from the normal price. Include shipping and tax consistently, and account for any subscription conditions. Compare the same formula and life-stage product rather than assuming all products with a similar brand name are interchangeable.
Consumption and purchases differ
An annual consumption estimate can contain a fraction of a bag. Your purchases come in whole bags, and some food may remain for the next year. The calculator’s cost estimates spread consumption over time rather than assuming every bag is empty on December 31.
Nutrition comes first
This comparison measures cost, not suitability or nutritional quality. Actual intake varies. Use your veterinarian’s guidance and your pet’s condition to assess a feeding amount. The calculator uses the energy label and the equations explained in its methodology.