Cat Daily Calorie Calculator
Fill in the values and the answer updates as you type.
How the Cat Daily Calorie Calculator works
Resting energy requirement (RER) = 70 × body weight in kg to the power 0.75. Daily calories = RER × a life-stage factor: 1.2 neutered adult, 1.4 intact adult, 1.0 inactive or senior, 0.8 weight loss, 1.6 active adult, and 2.5 kitten. Enter the target weight when you want weight loss, and never crash-diet a cat, because fast weight loss can damage the liver. Cups use the kcal per cup printed on the food bag. Example: A 4.5 kg neutered adult eating a 300 kcal/cup food needs about 260 kcal a day, or 0.87 cups.
Inputs and results
The Cat Daily Calorie Calculator takes 3 inputs and gives 3 results.
What you enter
- Cat weight (target weight if losing) (kg) — starts at 4.5.
- Life stage — starts at Neutered adult. Choose from: Neutered adult, Intact adult, Inactive or senior, Weight loss, Active adult and Kitten.
- Food energy density (kcal/cup) — starts at 300.
What you get
- Daily calories (kcal)
- Resting energy requirement (kcal)
- Food per day (cups)
Example: Cat Daily Calorie Calculator with the starting values
With cat weight (target weight if losing) 4.5 kg, life stage Neutered adult and food energy density 300 kcal/cup, the calculator returns:
| Daily calories (kcal) | 260 |
|---|---|
| Resting energy requirement (kcal) | 216 |
| Food per day (cups) | 0.87 |
Change any value above and the results update straight away.
Cat Daily Calorie Calculator FAQ
How do I use the Cat Daily Calorie Calculator?
Enter cat weight (target weight if losing), life stage and food energy density in the fields, then read daily calories (kcal), resting energy requirement (kcal) and food per day (cups) in the result panel. The answer updates as you type, and you can press Calculate or Enter to refresh it. Use “Copy link” to share your exact numbers with someone else.
What does the Cat Daily Calorie Calculator calculate?
Daily calories and cups of food for a cat by weight and life stage. It returns daily calories (kcal), resting energy requirement (kcal) and food per day (cups) from the 3 values you provide.
What values does the Cat Daily Calorie Calculator start with?
It opens with cat weight (target weight if losing) 4.5 kg, life stage Neutered adult and food energy density 300 kcal/cup so you can see a working result straight away. Replace them with your own numbers, or press Reset to return to these starting values.
Is the Cat Daily Calorie Calculator free and private?
Yes. It is free, needs no account, and runs in your browser, so nothing you type is sent to or stored on our servers. See the Privacy Policy for details.
Can I rely on the Cat Daily Calorie Calculator for medical or health decisions?
Treat the result as a well-rounded estimate. Real situations often have details a general calculator cannot know, so confirm medical or health decisions with a qualified professional. See the Disclaimer for more.