Daily Food Portion for a 40 kg Dog
Calculate the recommended daily food amount for a large 40 kg dog.
How to use this tool
- Weigh your dog or use the last vet measurement.
- Select the activity level that best matches your dog's lifestyle.
- Enter the kcal/100g from the dog-food bag (usually printed in the feeding guide).
- Read the recommended daily grams and approximate cups.
Very large dogs such as German Shepherds and Rottweilers at 40 kg have substantial caloric needs that vary with activity level.
Frequently asked questions
- What is RER?
- Resting Energy Requirement (RER) is the energy a dog needs at rest in a thermoneutral environment. It is calculated as 70 × weight(kg)^0.75 (the NRC formula).
- What is MER?
- Maintenance Energy Requirement (MER) is RER multiplied by an activity factor (0.8–1.6) to account for lifestyle. This is the target daily calorie intake for most dogs.
- How many grams in a cup of dry dog food?
- Approximately 100–120 g depending on kibble size. This calculator uses 115 g/cup as a middle estimate. Check your food's feeding guide for the exact figure.