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Student Pet Food Calculator — How It Works

Student Pet Food Calculator

Student Pet Food Calculator — How It Works

Calculates how much food your pet needs per day and how long a bag will last.

How it works

  1. Enter your pet’s weight in kilograms.
  2. Enter the feeding rate as a percentage of body weight per day (commonly 2-3% for adult dogs and cats).
  3. Enter the size and cost of a typical bag of food.
  4. The tool calculates the daily food amount in grams, how many days a bag will last, and the cost per day.

Formula

Daily food (g) = Pet weight (kg) × 1000 × (Feeding rate % ÷ 100)
Days per bag = (Bag size (kg) × 1000) ÷ Daily food (g)
Cost per day = Bag cost ÷ Days per bag

Example

A 10 kg pet fed at 2.5% of body weight needs 250 g/day. A 10 kg bag costing $30 would last 40 days — about $0.75/day.

Notes

Feeding rates vary significantly by species, breed, age, activity level, and food type (dry vs. wet). Check the feeding guide on your specific pet food’s packaging, and consult a veterinarian for personalized portion advice.

Try the Student Pet Food Calculator — instant results in your browser, no sign-up.

FAQ

Is this free?

Yes — the Student Pet Food Calculator runs entirely in your browser, no sign-up required.

Is this exact?

The calculator performs the math precisely from the numbers you enter, but real-world figures (sleep needs, feeding rates, costs) vary by individual — use the result as a planning guide.