About the Dog Food Calculator
Daily dog food portion by weight, age and activity, with how long a bag lasts.
Also known as: how much to feed my dog, dog portion calculator, dog feeding guide, puppy food amount.
How to use this calculator
- Enter dog’s weight, life stage, activity, calories in the food and the other fields.
- The result updates instantly as you type — press Calculate (or Enter) at any time.
- Review the breakdown shown under the main result.
- Use Copy result or Share to save the answer or send a link with your inputs.
Formula
RER = 70 × weight^0.75, then adjusted for life stage and activity
Worked example
Using the values pre-filled in the calculator above:
- Dog’s weight = 20 kg
- Life stage: Adult
- Activity: Normal
- Calories in the food = 3,600 kcal/kg
- Meals per day = 2
- Bag size = 12 kg
- Price per bag = 45
the calculator returns:
- Daily portion: 184 g
- Per meal: 92 g
- Daily calories: 662 kcal
- Resting energy requirement: 662 kcal