RER Calculator for Dogs
Calculate your dog’s Resting Energy Requirement
Dog Weight (lbs)
Life Stage (Multiplier)
What Is RER for Dogs?
The Resting Energy Requirement (RER) is the number of calories a dog needs at complete rest just to maintain basic bodily functions — breathing, circulation, and organ function. It is the foundation for calculating all dog feeding recommendations. The RER formula used by veterinarians is: RER = 70 × (body weight in kg)^0.75
RER and DER Reference Table for Dogs
| Dog Weight | RER (kcal) | Adult DER (x1.0) | Active DER (x1.4) |
|---|---|---|---|
| 10 lbs | 295 | 295 | 413 |
| 25 lbs | 590 | 590 | 826 |
| 50 lbs | 990 | 990 | 1386 |
| 75 lbs | 1320 | 1320 | 1848 |
| 100 lbs | 1605 | 1605 | 2247 |
FAQs
What is the difference between RER and DER?
RER is the baseline calorie requirement at rest. DER (Daily Energy Requirement) is RER multiplied by a life stage factor that accounts for activity, age, reproductive status and health condition. DER is what you actually feed your dog each day.
How accurate is the RER formula for dogs?
The RER formula is the gold standard used by veterinary nutritionists worldwide. It provides a reliable starting point, but individual dogs may need 10-20% adjustments based on actual weight monitoring. Always adjust based on monthly body condition checks.
Conclusion
Our RER calculator for dogs gives you the foundational calorie number your vet uses. Use it alongside our dog food calculator for daily portion amounts and our weight calculator to monitor results.