Daily Pet Food Calculator — Free & No Login | PetHealthCalc

Calculate dog and cat daily food portion in 3 seconds. Free, evidence-based tool using RER/MER formulas with no login required.

Guide

Managing your pet's daily food intake is the most effective way to prevent obesity. This tool provides science-based portioning instead of guesswork.

It calculates the Resting Energy Requirement (RER), multiplies it by an activity factor for the Maintenance Energy Requirement (MER), and divides by the food's energy density to give grams per day in just 3 seconds.

No login required and completely free. Use it alongside the Ideal Weight Calculator to adjust portions gradually and keep your pet healthy.

How to Use

  1. Weigh your pet accurately using a scale.
  2. Select your pet's current life stage and activity level (e.g., neutered adult, puppy).
  3. Enter the calorie content of your pet's food (kcal/kg) found on the packaging.
  4. Click calculate to see the recommended daily food amount in grams.

Frequently Asked Questions

What is RER in pet nutrition?

Resting Energy Requirement (RER) is the energy needed for basic body functions at rest. It is calculated as 70 x (body weight in kg)^0.75.

How does MER differ from RER?

Maintenance Energy Requirement (MER) adjusts the RER based on the pet's activity level, age, and reproductive status to give a more realistic daily target.

Do neutered pets need fewer calories?

Yes. Neutering or spaying typically reduces a pet's metabolic rate, requiring a reduction in daily calories to prevent unwanted weight gain.