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Pet Food Calculator

Calculate daily food portions for dogs based on weight and activity.

Last updated: June 13, 2026

Calculator

Pet Weight

lbs

Activity Level

Food Calories per Cup

kcal/cup

Results

Daily Calories1164 kcal

Cups per Day3.3 cups

Resting Energy Req.727 kcal

Weight (kg)22.7 kg

How to Use This Calculator

1Enter your dog's weight in pounds.
2Select activity level.
3Enter food calories per cup from the bag.
4View daily calorie needs and cup portions.

Formula Explanation

Daily calorie needs are based on Resting Energy Requirement (RER) adjusted by an activity multiplier.

RER = 70 × (Weight in kg)^0.75 Daily Calories = RER × Activity Multiplier

Variables:

WeightDog weight in kg

RERResting energy requirement

Multiplier1.2 (low) to 2.5 (puppy)

Worked Examples

50 lb moderate-activity dog, 350 cal/cup food

1. Weight in kg = 22.7
2. RER = 70 × 22.7^0.75 = 734
3. Daily cal = 734 × 1.6 = 1,175
4. Cups = 1,175 ÷ 350 = 3.4

Result: ~1,175 calories/day, 3.4 cups

Why Use This Calculator

Feed the right amount for your dog's size.
Prevent obesity from overfeeding.
Adjust for activity level.
Calculate based on your specific food brand.

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Tips & Best Practices

Puppies need 2-3× more calories per pound than adult dogs.
Split daily food into 2 meals for adults, 3-4 meals for puppies.
Treats should be no more than 10% of daily calories.
Adjust portions every few months based on weight changes.

Common Mistakes to Avoid

❌ Using the feeding guide on the bag without adjusting for activity.

✅ Bag guidelines are rough estimates for average dogs. Active dogs may need 25% more, sedentary dogs 20% less.

❌ Not weighing food accurately.

✅ Use a measuring cup or kitchen scale. "Eyeballing" portions tends to overestimate by 20-40%, leading to gradual weight gain.

Frequently Asked Questions

How do I know if I'm feeding the right amount?

Monitor your dog's weight monthly. You should be able to feel their ribs without pressing hard, and they should have a visible waist when viewed from above.

Should I feed puppies differently?

Yes. Puppies need 2-3× the calories per pound of an adult. Feed puppy-specific food 3-4 times daily until 6 months, then transition to twice daily.

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Embed This Calculator

Add the Pet Food Calculator to your website for free. Copy the code below and paste it into your HTML.

Width

Height

<iframe src="https://redicalc.com/embed/pets/pet-food-calculator" width="100%" height="600" style="border:none;border-radius:12px;box-shadow:0 1px 3px rgba(0,0,0,0.1);" title="Pet Food Calculator — RediCalc.com" loading="lazy" allowtransparency="true"></iframe>

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Disclaimer: This calculator is provided for informational and educational purposes only. Results are estimates and should not be used as a substitute for professional advice. RediCalc.com makes no guarantees regarding the accuracy, completeness, or suitability of any calculations. Always consult a qualified professional before making financial, health, construction, or other important decisions.

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