Biology
Estimate daily calories from resting energy need and a life-stage factor.
Your inputs
Change any value — everything updates instantly.
Current (or ideal) weight.
Neutered adult 1.6, intact 1.8, weight loss 1.0, puppy 2–3.
Try an example
Daily calories
854 kcal/day
This means about 854 kcal per day as a starting point.
What you are seeing
Each bar grows to show a result for your inputs.
The top bar is the main answer: 854 kcal/day.
Change body weight (now 15) and the bars update instantly.
Resting energy (RER)
534 kcal/day
70 × kg^0.75.
Result explanation: Daily calories
854 kcal/day.
Real-life comparison: With body weight 10% higher, the answer would be 916.92.
Low, normal or high? Use this as an estimate based on the stated formula.
How the result changes with body weight
How to read this chart: The line shows the result across a range of values. The dot marks your input.
Estimate daily calories from resting energy need and a life-stage factor.
This means about 854 kcal per day as a starting point.
Individual needs vary up to ±50%.
Energy use scales with metabolic body weight.
MER = 70 × weight^0.75 × factor
Symbols
Why this formula works
Energy use scales with metabolic body weight.
Unit check
Units match on both sides ✓
Worked example
Common mistakes
This means about 854 kcal per day as a starting point.
It's a starting point; adjust by body condition.
Keep treats under 10% of daily calories.
Ask your vet for your dog's life stage.
Use ideal weight with factor 1.0 under vet guidance.
Reviewed 2026-09-25 · Next review 2027-09-25
Important limitation. Individual needs vary up to ±50%.
Tell us if a formula, unit, explanation, or result needs attention. Your message will include this calculator’s name and page.
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