Cat Food Calculator
How Much Wet and Dry Food to Feed Your Cat
Find out exactly how much to feed your cat each day based on their weight, age, and neuter status. Works for wet food only, dry food only, or mixing wet and dry food in any ratio.
How Much Wet Food to Feed a Cat Calculator
Enter your cat’s weight and a few details. The cat feeding calculator will work out their daily calorie target and convert it into actual food portions for your specific food type.
Typical Cat Feeding Amounts at a Glance
Cat Feeding Chart — How Much Wet and Dry Food by Weight
A quick-reference feeding chart for adult neutered cats. All amounts assume standard wet food at 95 kcal per 3oz can and standard dry kibble at 370 kcal per cup. Use the calculator above for your specific food’s calorie content.
| Cat weight | Daily kcal (MER) | Wet food only (3oz cans) | Dry food only (cups) | Mixed 50/50 — wet + dry |
|---|---|---|---|---|
| 3 kg / 6.6 lb | 168 | 1.8 cans | ⅖ cup (45g) | 1 can + ¼ cup |
| 3.5 kg / 7.7 lb | 188 | 2.0 cans | ½ cup (50g) | 1 can + ¼ cup |
| 4 kg / 8.8 lb | 207 | 2.2 cans | ½ cup (55g) | 1 can + ¼ cup |
| 4.5 kg / 10 lb ★ | 225 | 2.4 cans | ⅔ cup (60g) | 1 can + ⅓ cup |
| 5 kg / 11 lb | 243 | 2.6 cans | ⅔ cup (65g) | 1.5 cans + ⅓ cup |
| 5.5 kg / 12 lb | 260 | 2.7 cans | ¾ cup (70g) | 1.5 cans + ⅓ cup |
| 6 kg / 13.2 lb | 277 | 2.9 cans | ¾ cup (75g) | 1.5 cans + ⅓ cup |
| 6.5 kg / 14.3 lb | 293 | 3.1 cans | ⅘ cup (80g) | 1.5 cans + ⅖ cup |
| 7 kg / 15.4 lb | 309 | 3.3 cans | ⅘ cup (83g) | 1.5 cans + ⅖ cup |
| 8 kg / 17.6 lb | 339 | 3.6 cans | ⅘ cup (91g) | 2 cans + ⅖ cup |
| Kitten age | Typical weight | Daily kcal needed | Wet food per day | Meals per day |
|---|---|---|---|---|
| 6–8 weeks | 0.4–0.7 kg | ~100 | ~1 can (3oz) | 4–5 meals |
| 2–3 months | 0.8–1.2 kg | ~130 | ~1.5 cans | 4 meals |
| 3–4 months | 1.2–1.8 kg | ~160 | ~1.7 cans | 3–4 meals |
| 4–6 months | 1.8–2.7 kg | ~200 | ~2 cans | 3 meals |
| 6–12 months | 2.5–4 kg | ~220–260 | 2–2.5 cans | 2–3 meals |
Why wet food portions look bigger
The problem with “eyeballing” portions
How Much Wet Food Should You Feed a Cat Each Day?
The honest answer is that it depends on your cat’s weight, age, and whether they are neutered. There is no single number that works for every cat, which is exactly why the cat food calculator above uses your cat’s specific details rather than a one-size-fits-all chart.
For a typical neutered adult cat weighing around 4.5 kg (10 lb), the daily calorie target works out to approximately 225 kcal per day. Using a standard 3oz can of wet food at 95 kcal per can, that means feeding roughly 2.4 cans spread across two meals. But a cat that weighs 6 kg needs closer to 277 kcal, and a senior cat eating the same food might need 10 to 15% less.
The amount shown on the back of a cat food tin is a starting point, not a prescription. Pet food manufacturers often print generous feeding guidelines — partly because it encourages owners to buy more food. Independent calculations using the RER formula (the same approach used by veterinary nutritionists) tend to give lower, more accurate results for maintaining a healthy weight.
The most reliable approach is to calculate the target, feed that amount for four to six weeks, then weigh your cat and adjust. If your cat is gaining weight, reduce by 10 to 15%. If they are losing weight unexpectedly, or seem constantly hungry and thin, speak to your vet rather than simply feeding more.
Mixing Wet and Dry Cat Food: How to Get the Portions Right
Feeding a combination of wet and dry food is perfectly fine and is what many vets recommend. The key is making sure the total calories from both foods add up to your cat’s daily target — not treating them as two separate meals on top of each other.
The most common mistake with mixed feeding is doubling the portions. If you give half a cup of dry food and then add a full can of wet food on top, you are likely feeding double what your cat needs. The correct approach is to decide on a split — for example 50% of calories from wet and 50% from dry — and calculate the portions for each food type accordingly.
A popular approach is 70% wet and 30% dry. This gives the hydration benefits of wet food while keeping some dry kibble in the diet for convenience. For a 4.5 kg neutered cat needing 225 kcal per day: 157 kcal from wet food works out to roughly 1.6 small cans, and 68 kcal from dry food is about one-fifth of a cup. The mixing wet and dry cat food calculator above handles this split automatically when you choose “Mix wet and dry” mode and set the slider.
Cat Feeding Calculator by Life Stage: Kitten, Adult, Senior
How much you feed changes significantly across a cat’s life. Kittens need far more calories relative to their size than adult cats. Senior cats often need fewer calories but more protein. Here is how to think about each stage.
| Life stage | MER multiplier | Feeding frequency | Key nutritional focus |
|---|---|---|---|
| Kitten under 6 months | ×2.0 | 4 meals per day | High protein and fat. Kitten-formula food only. Do not restrict calories. |
| Kitten 6 to 12 months | ×1.6 | 3 meals per day | Transition to adult food around 12 months. Gradually reduce meal frequency. |
| Neutered adult | ×1.2 | 2 meals per day | Weight management is the main priority. Measure portions precisely. |
| Intact adult | ×1.4 | 2 meals per day | Higher calorie need due to reproductive hormonal activity. |
| Senior (7+ years) | ×1.1 | 2 to 3 meals per day | Protein stays important for muscle. Wet food helps with hydration. Watch for weight loss. |
| Pregnant or nursing | ×1.6 to ×2.0 | 3 to 4 meals per day | Kitten-formula food recommended. Do not restrict calories during pregnancy or nursing. |
| Needs to lose weight | ×1.0 (feed at RER) | 2 to 3 meals per day | Wet food helps satiety. Safe rate of loss: 1 to 2% of body weight per week. |
Kittens need more than you might expect. A 2-month-old kitten weighing 800 grams needs proportionally more calories per kilogram than a full-grown adult cat. Their MER multiplier of ×2.0 reflects how much energy rapid growth requires. Underfeeding kittens leads to stunted development and immune problems. This is not a life stage to restrict calories.
Senior cats are often underfed protein. It is a common misconception that senior cats should have lower protein because of kidney concerns. In healthy senior cats without kidney disease, protein should actually stay high to maintain muscle mass. Muscle loss is one of the main reasons older cats lose weight even when appetite seems normal.
Using a Cat Food Calculator for Weight Loss
Over 60% of domestic cats are overweight or obese, making excess weight one of the most common health problems vets see. Using a feeding calculator is one of the most effective tools for managing it safely.
For weight loss, use the calculator with the “Needs to lose weight” life stage selected. This applies the ×1.0 multiplier, which means feeding at RER — the cat’s resting calorie needs without an activity bonus. The safe rate of weight loss is 1 to 2% of body weight per week. Going faster than this risks hepatic lipidosis (fatty liver disease), which is a serious and potentially fatal condition in cats.
Wet food is particularly useful for weight loss in cats. Because it contains 70 to 80% water, it fills the stomach with fewer calories than the equivalent volume of dry food. Many cats feel fuller on a wet food diet at a calorie deficit than they would on the same calorie deficit from dry kibble alone.
Do not simply switch to “diet” or “light” dry food without recalculating. Many light kibbles still have 280 to 320 kcal per cup, and if your cat was already eating too much, switching the food type without reducing the volume often produces no weight loss at all. Calculate the correct gram amount for your specific food using the calculator above.
Weigh your cat every two to four weeks during a weight loss programme. A kitchen scale that measures in 10g increments is ideal. If your cat is not losing weight after six weeks on calculated portions, the most common causes are: treats not being counted, other household members feeding extra, or the cat finding food elsewhere. Rarely, an underlying condition like hyperthyroidism causes weight retention — worth a blood test if portions are accurate but weight won’t shift.
Cat Food Calculator: Frequently Asked Questions
Common questions about how much wet food to feed a cat, mixing wet and dry cat food, reading food labels, and what to do when a cat seems constantly hungry.
It depends on your cat’s weight and whether they are neutered. As a rough guide for a neutered adult cat on standard 3oz cans (~95 kcal each):
- 3.5 kg (7.7 lb) cat — about 2 cans per day
- 4.5 kg (10 lb) cat — about 2.4 cans per day
- 5.5 kg (12 lb) cat — about 2.7 cans per day
These are starting points. Check your specific brand’s kcal/can on the label, then use the cat food calculator above to get an accurate amount for your cat’s exact weight. Feed that amount for four to six weeks and adjust based on whether your cat’s weight is stable.
The calorie needs of a cat depend on their weight, age, and neuter status. These are typical daily targets for neutered adult cats:
- 3.5 kg (7.7 lb) — about 188 kcal per day
- 4.5 kg (10 lb) — about 225 kcal per day
- 5.5 kg (12 lb) — about 260 kcal per day
Kittens need significantly more — up to double the adult amount relative to their weight. Senior cats need slightly less. Pregnant and nursing cats need considerably more. The formula used by vets is RER = 70 × (weight in kg)^0.75, multiplied by a life stage factor. The calculator above does this automatically.
For a standard kibble at 370 kcal per cup, a neutered adult cat typically needs:
- 3.5 kg (7.7 lb) cat — about half a cup per day
- 4.5 kg (10 lb) cat — about two-thirds of a cup per day
- 5.5 kg (12 lb) cat — about three-quarters of a cup per day
These amounts look small because dry kibble is calorie-dense. A “full cup” of kibble contains 300 to 450 kcal depending on the brand — more than most cats need in an entire day. This is why dry-food-only cats are so prone to obesity when owners eyeball portions. Always check your specific brand’s kcal/cup on the back of the bag.
Most adult cats do well on two meals per day, typically morning and evening. This works for both wet and dry food, and makes it easier to notice changes in appetite that might signal a health problem.
Kittens under six months need three to four smaller meals per day because their stomachs are small and their energy needs relative to body size are very high. Feeding more frequently keeps blood glucose stable and supports healthy growth.
Free-feeding dry food (leaving it out all day) tends to lead to overeating in indoor cats. It also makes it harder to notice when a cat’s appetite changes, which is often the first sign of illness. Measured meals at set times are a better approach for most households.
The key is to think in calories, not in physical portions. First, calculate your cat’s total daily calorie target. Then decide on a split — for example, 60% from wet food and 40% from dry. Calculate each food’s portion separately to reach those calorie targets.
Example for a 4.5 kg neutered cat needing 225 kcal per day on a 60/40 split:
- Wet food: 225 × 60% = 135 kcal ÷ 95 kcal per can = 1.4 small cans per day
- Dry food: 225 × 40% = 90 kcal ÷ 370 kcal per cup = 0.24 cups (about 30g) per day
The mixing wet and dry cat food calculator on this page does this calculation automatically. Just select “Mix wet and dry” mode, set the slider to your preferred split, and enter your food’s calorie values.
Both can be nutritionally complete if the food is labelled as such. The practical differences come down to your cat’s specific needs:
Wet food is generally the better choice for cats with kidney disease, urinary issues, or a tendency to be overweight, because the high water content supports hydration and helps cats feel fuller on fewer calories. Many vets now recommend wet food as the primary diet for cats, particularly males prone to urinary blockages.
Dry food is more convenient and cost-effective. Some cats simply prefer it, and it can be used in puzzle feeders which provide mental stimulation. The dental benefit of dry food is modest — it does not replace dental care but some textured kibbles may help with surface plaque.
A combination of wet and dry works well for many cats and is what a large number of vets recommend. The wet food provides hydration, and the dry provides a practical element that is easy to use in slow feeders or leave during the day.
Look for “Calorie Content” on the back or side of the packaging, usually near the feeding guide or guaranteed analysis. Wet food will typically say something like “X kcal/can” or “X kcal/kg”. Dry food will usually say “X kcal/cup” or “X kcal/kg”.
If it shows kcal per kg and you want kcal per can, divide the kcal/kg value by 1000 to get kcal per gram, then multiply by the weight of one can in grams. For example: 900 kcal/kg × (85g can ÷ 1000) = 76.5 kcal per can.
If the calorie content isn’t on the package, check the manufacturer’s website. If you can’t find it there, call their customer service line — by law in most countries, manufacturers must be able to provide this information.
The calculator is almost certainly more accurate for your cat’s individual needs. Feeding guides on pet food packaging are deliberately generous and represent the upper end of what an average cat of that weight might eat. They do not account for whether your cat is neutered, how active they are, or their individual metabolism.
Many veterinary nutritionists note that following pet food label guidelines closely is one of the contributing factors to feline obesity. The RER-based calculation used in this calculator is the same methodology used in clinical veterinary nutrition.
Not necessarily. Cats are highly food-motivated and will often act hungry regardless of how much they have eaten. This is normal behaviour and not a reliable indicator of actual calorie need.
If your cat is maintaining a healthy body condition score (you can feel their ribs without pressing hard, waist visible from above), then they are likely getting the right amount. Food-seeking behaviour in a cat at healthy weight is usually a behavioural issue, not a nutritional one.
However, a cat that is genuinely losing weight despite eating normally, or is noticeably thinner while eating the same or more than usual, should see a vet. Conditions like hyperthyroidism, diabetes, and intestinal disease can all cause a cat to eat more but still lose weight. This is different from a healthy cat begging for extra food.
Multi-cat households where cats eat different amounts are one of the most common challenges in feline nutrition. A few approaches that work:
- Feed in separate rooms with doors closed to prevent bowl-stealing
- Use timed automatic feeders that open only at designated meal times
- Microchip-activated feeders open only for the cat wearing the matching collar or microchip — useful when one cat needs a prescription diet
- Feed wet food (which cats eat quickly and finish) rather than leaving dry food out all day
Supervision during meals is the simplest solution for most households. Feed separately, watch that each cat finishes their own portion, then pick up the bowls.
Calculate exactly how much to feed your cat
Use the cat food calculator above. Enter your cat’s weight, life stage, and food type to get a precise daily portion in cans, cups, and grams.