Pet Food Calculator – How Much Should I Feed My Dog or Cat? (Free)

How to use

Enter your pet's weight, species and life stage.
Set the body condition.
Enter the food's calories, and read the daily grams or cups.

About this tool

Feeding guides on the bag are averages written for an animal that may look nothing like yours. The standard approach is to start from resting energy requirement — roughly 70 × (body weight in kg)^0.75 — then multiply by a factor for life stage, neuter status and activity. That gives a daily calorie target, which you divide by the calorie density on your food's label to get grams. This tool does that calculation and lets you enter your own food's kcal per cup or per 100 g. It is a starting point: body condition score and your vet's advice beat any formula.

FAQ

Is anything stored?

No — local calculation only.

Where does the formula come from?

RER ≈ 70 × kg^0.75, multiplied by a life-stage/activity factor — the standard veterinary starting point.

What if my pet is overweight?

Choose the overweight condition; the tool reduces the target. Weight loss should still be supervised by a vet.

Wet or dry food?

Enter the kcal density printed on that food — dry is often 350–400 kcal/100 g, wet 80–110 kcal/100 g.

How often should I weigh my pet?

Monthly during any weight change, then every few months once stable.

Is this a diagnosis?

No. It is a starting portion to adjust based on body condition and vet advice.

Questions people ask about Pet Food Calculator (Daily Portions)

Collected from live search results on 31 Aug 2026 (search-engine "people also ask" boxes plus the questions published on ranking pages).

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