Dog food types
How do I compare calories between two dog foods?
Last updated 23 September 2026 · How we write and check this
Short answer
Compare calories per 100 grams or per typical serving, listed as kilocalories per kilogram or per cup on most labels or brand websites, rather than comparing bag prices or ingredient lists alone, since calorie density varies significantly between products even within the same weight category.
Where to find the number
Most reputable brands print kilocalories per kilogram or per cup somewhere on the bag or on their website's product page, and if a food does not disclose this anywhere, that omission itself is worth noting when judging overall transparency.
Why density varies so much
A high fat, calorie-dense formula aimed at active working dogs might contain 450 to 500 kcal per 100 g, while a weight management formula might sit closer to 300 to 350 kcal per 100 g, meaning equal cup measurements deliver very different calorie totals.
Using the comparison practically
Once you know kcal per 100 g for both foods, you can calculate how much of each is needed to reach your dog's daily target and compare the actual cost and portion size side by side rather than assuming similar bags perform the same.
Key takeaways
- Compare calorie density per 100 grams or per cup, not bag size or price alone.
- Calorie density can vary by 30 percent or more between different formulas.
- Knowing kcal per 100 g lets you calculate true portion size and cost comparisons.