How Much Should I Feed My Dog? Portions, Calories and Body Condition
The feeding chart on the bag is a starting point, and a rough one. It’s written for an average dog, usually generously, and your dog may not be average. A dog that gets 10% too much food every day can gain a noticeable amount of weight over a year, and that’s easy to do when a scoop of kibble can vary by 20% or more depending on how you fill it.
This guide shows how to estimate your dog’s daily calories, turn that into grams of food, check whether you’ve got it right, and adjust. It’s meant to work alongside the feeding guide on your dog’s food, not replace it, and your vet is the best person to set a target for your individual dog. For cats, see our version: how much should I feed my cat.
The short answer
There’s no single amount that suits every dog. A healthy adult dog’s daily needs run from a few hundred calories for a toy breed to well over a thousand for a large one, and the same size of dog can differ by 20 to 30% depending on age, activity and metabolism. Start with the feeding guide on the package, weigh the food, check your dog’s body shape every few weeks, and adjust. If you’re unsure, ask your vet for a calorie target.
Step 1: Estimate daily calories
Vets and nutritionists often use a standard formula to estimate energy needs:
Resting energy requirement (RER) = 70 × (body weight in kg)^0.75
Then multiply by a factor for your dog’s life stage and lifestyle.
Common factors used for adult dogs are roughly:
| Dog | Typical multiplier |
|---|---|
| Neutered adult, normal activity | about 1.6 |
| Intact adult, normal activity | about 1.8 |
| Less active, or prone to weight gain | about 1.2 to 1.4 |
| Very active or working dog | about 2 to 5, depending on workload |
| Weight loss (use the target weight) | about 1.0 |
These are estimates, not prescriptions. Real needs vary a lot between individual dogs, so treat the result as a starting point and adjust to your dog’s body condition.
You don’t need to do the maths. Here are rough starting points for a neutered adult dog at a healthy weight with normal activity, using a multiplier of 1.6:
| Healthy weight | Approx. daily calories |
|---|---|
| 5 kg (11 lb) | ~375 kcal |
| 10 kg (22 lb) | ~630 kcal |
| 20 kg (44 lb) | ~1,060 kcal |
| 30 kg (66 lb) | ~1,435 kcal |
| 40 kg (88 lb) | ~1,785 kcal |
Use your dog’s ideal weight, not their current weight, if they’re over or underweight. Ask your vet what that is.
Puppies, pregnant or nursing dogs, seniors and dogs with health conditions have different needs, and puppies in particular need much more per kilogram. See our guides to food for puppies and food for senior dogs and cats, and ask your vet.
Step 2: Find the calories in your dog’s food
Look on the package for the food’s calorie content, usually written as kcal per kg, kcal per cup, or kcal per can or pouch. In the US it’s often labelled “ME” (metabolisable energy).
Calorie density varies a lot:
- Dry food is often around 3.3 to 4.2 kcal per gram (3,300 to 4,200 kcal/kg)
- Wet food is often around 0.8 to 1.4 kcal per gram
- Fresh food varies, often somewhere in between
If the label doesn’t show calories, check the brand’s website or ask the company. A brand that won’t say is a transparency flag in our scoring.
Step 3: Turn calories into grams
Grams per day = daily calories ÷ (kcal per gram)
(If the label says kcal per kg, divide by 1,000 to get kcal per gram.)
Here’s an illustration using a dry food of about 3.6 kcal per gram (check your own label, because brands vary a lot):
| Healthy weight | Daily calories | Approx. dry food per day |
|---|---|---|
| 5 kg | ~375 kcal | ~105 g |
| 10 kg | ~630 kcal | ~175 g |
| 20 kg | ~1,060 kcal | ~295 g |
| 30 kg | ~1,435 kcal | ~400 g |
| 40 kg | ~1,785 kcal | ~495 g |
A food that’s more calorie-dense means a smaller portion, and a less dense one means a bigger portion, so don’t copy someone else’s gram amounts if you’re feeding a different food.
If you want to know what that costs per day, see our guide to the real cost of feeding a dog.
Step 4: Weigh the food, don’t scoop it
A “cup” of kibble can differ by 20% or more depending on the brand, how you fill it, and how hard you pack it. For a small dog, that’s a big swing.
- Use a kitchen scale that measures in grams.
- Weigh the day’s portion, then split it across meals.
- If you prefer a scoop, weigh what your scoop holds once, and recheck now and then.
- Don’t use a random mug, cup or bowl as a measure.
What the feeding guide on the bag really tells you
Package feeding guides are a useful starting point, but they’re averages, and many err on the generous side. They often assume a dog with a fairly high activity level, and they may not account for treats, neutering or a sedentary home. Use the guide as the first number, then adjust to your dog.
Wet, mixed and fresh feeding
If you feed more than one type, split the calories, not the grams. For example, a dog needing 630 kcal might get half from dry and half from wet:
- 315 kcal of dry food ÷ 3.6 = about 88 g
- 315 kcal of wet food ÷ 1.0 = about 315 g
The common mistake is adding a can of wet food on top of a full portion of dry, which can add several hundred calories without anyone noticing. Decide the split first, and reduce one food when you add the other. For more, see our comparison of fresh dog food vs kibble.
Don’t forget treats
Treats count. A common guideline is to keep treats and extras to around 10% of daily calories or less, and to take them out of the main meal amount. For a 10 kg dog on 630 kcal, that’s about 63 kcal, which can be gone in two or three biscuit-sized treats. Training sessions, dental chews, chews bought on a walk and “just a bit of cheese” all count. Check the calories on the pack, and use part of the daily kibble as training rewards when you can.
Remember too that some common foods are dangerous. See our guide to foods toxic to dogs.
How often to feed
Most healthy adult dogs do well on two meals a day, usually about 8 to 12 hours apart. Some owners feed once a day, but that can mean a long gap and a very hungry dog, so ask your vet. Large, deep-chested breeds can be at risk of a serious emergency called bloat (gastric dilatation-volvulus), and vets often advise splitting their food into two or more meals, avoiding vigorous exercise right after eating, and avoiding very large single meals. Ask your vet about your dog’s risk.
Puppies need more frequent meals. See our puppy food guide.
Free-feeding (leaving food out all day) works for a few dogs, but many overeat, and it makes it harder to notice changes in appetite. Measured meals give you more control.
Step 5: Check your dog’s body condition
The scale tells you weight, but body shape tells you whether it’s the right weight for your dog. Our guide on how to tell if your dog is overweight explains the hands-on checks in detail. In short:
- Ribs. You should be able to feel them easily under a thin layer of fat.
- Waist. From above, there should be a slight narrowing behind the ribs.
- Belly. From the side, it should tuck up behind the chest.
A dog that’s slightly lean is usually healthier than one that’s slightly heavy, but a dog with visible ribs, hip bones and spine may be underweight. Long and double coats can hide shape, so use your hands.
Step 6: Adjust and track
- Weigh your dog every few weeks at first, using a pet scale, at your vet’s, or by weighing yourself with and without your dog.
- Keep a simple record of weight and daily food.
- Adjust in small steps. If your dog is gaining, reduce the daily amount by around 10% and recheck in two to four weeks. If losing, increase slightly. Ask your vet for guidance, particularly if your dog needs to lose a lot.
- Recheck after any change in life stage, activity, neutering, medication, season or home routine.
Don’t cut food sharply or put a dog on a crash diet. Ask your vet to set a target weight and a safe rate of loss.
What changes the amount
- Age. Puppies need much more per kilogram, and many seniors need fewer calories, though some older dogs lose weight and need more.
- Activity. Working dogs, athletic dogs and dogs that run daily need more than dogs that mostly nap.
- Neutering. Neutered dogs often need fewer calories, so adjust portions around the time of surgery. Ask your vet.
- Breed and metabolism. Some breeds gain weight easily, and some stay lean on the same amount.
- Weather. Dogs that live outdoors in cold conditions may need more, and many dogs need less in hot weather.
- Health conditions and medications. Diabetes, thyroid problems, kidney disease, allergies and some drugs can change needs, so follow your vet’s plan.
- Pregnancy and nursing. Needs rise substantially, so ask your vet.
Special cases
Small and toy breeds. They need very little food, so a small mistake is a big proportion. Weigh carefully. Toy puppies can also be at risk of low blood sugar if they go too long without eating. See our guide to the best food for small dogs.
Large and giant breeds. They eat a lot, but be careful not to overfeed growing puppies, since fast growth can affect joints. See our puppy food guide.
Fluffy and double-coated dogs. Thick coats hide body shape, so check by feel. See our guide to the best food for fluffy dogs.
Dogs that beg. Many beg because it works. Stick to set mealtimes, use part of the daily food in puzzle feeders and training, and don’t give in at the table. If hunger seems extreme or sudden, ask your vet to rule out medical causes.
Mistakes to avoid
- Following the bag blindly without checking your dog’s condition
- Using cups and scoops instead of weighing food
- Forgetting treats, chews and scraps
- Feeding the same amount after neutering, a drop in activity or a change in food
- Changing foods without adjusting amounts. Calorie density differs between brands
- Judging weight by looks alone. Feel the ribs
- Cutting food sharply to make a dog lose weight
- Adding wet food on top of a full dry portion
- Switching foods suddenly. Change over about a week
- Ignoring changes in appetite, thirst or weight
When to call your vet
Contact your vet if your dog:
- Is overweight or underweight by the checks above
- Gains or loses weight without a change in food
- Eats much less, refuses food, or is suddenly ravenous
- Drinks or urinates much more than usual
- Has vomiting or diarrhoea that persists
- Is lethargic, stiff or reluctant to exercise
- Has a swollen, painful belly, retches without producing anything, or seems restless and uncomfortable after eating (this can be an emergency in large, deep-chested breeds)
Our guide to how to choose a vet can help you find one before you need them.
Final thoughts
Feeding the right amount comes down to a few steps: estimate your dog’s calories, check them against the food’s label, weigh the food, count treats, and watch your dog’s body shape over time. It takes a few minutes to set up, and it’s one of the most useful things you can do for your dog’s long-term health. For help choosing a complete and balanced food, see our guide to reading a pet food label, and when our first reviews go live you’ll see how each brand scores on our How we review method.
Frequently asked questions
How much should I feed my dog per day?
It depends on weight, age, activity and the food’s calories. A neutered adult at a healthy weight often needs roughly 70 × (weight in kg)^0.75 × 1.6 calories, then convert that to grams using the food’s label. Adjust with your vet’s advice.
How many cups of food should I feed my dog?
It varies with the food and the cup. Cups aren’t reliable, so weigh the food in grams, and use the label’s calories per cup only as a rough guide.
Is the feeding guide on the bag accurate?
It’s a starting point based on averages, and many are on the generous side. Watch your dog’s weight and adjust.
How often should I feed my dog?
Most adult dogs do well on two meals a day. Puppies need more often, and large deep-chested breeds may need smaller, split meals. Ask your vet.
How much should I feed my dog to lose weight?
Ask your vet for a calorie target based on your dog’s ideal weight, and weigh the food. Don’t cut food sharply on your own.
Should I feed more if my dog is active?
Often yes, but how much depends on the workload. Adjust gradually and check body condition.
How much wet food should I feed my dog?
It depends on the food’s calories, which vary widely. Use the label and split calories if you mix wet and dry.
How do I know if I’m feeding too much?
You can’t easily feel the ribs, there’s no visible waist, and weight is creeping up. Reduce the amount in small steps and ask your vet.
Do treats count towards my dog’s daily food?
Yes. Keep them to around 10% of daily calories or less, and take them from the daily total.
Related reading: How Many Treats Can My Dog Have? The 10% Rule by Calories
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