🍽️ Calculate Portion Sizes
Enter your baby's age and weight. We give you exact tablespoon and katori amounts for lentils, rice, vegetables, fruits, more.
How this tool actually helps
Five quick steps to get a realistic portion plan for your baby.
- 1Enter your baby's age in months
Anywhere from 6 to 24 months. We do not cover before 6 months because exclusive breastfeeding or formula is recommended till 6 months. No solid food calculation needed.
- 2Enter weight in kilograms
From your last pediatrician check. We compare against WHO weight-for-age standards and adjust portion suggestions slightly if your baby is on the lower or higher end.
- 3Pick gender
WHO growth standards differ slightly by gender. We use the right reference for boys and girls.
- 4Choose feeding type
Still breastfeeding, exclusively formula, mixed, or weaning off milk feeds. This adjusts the solid food calorie target. Breastfed babies at 8 months need less solid food than fully weaned babies.
- 5Click Calculate
You get daily calorie target from solids, number of meals plus snacks, exact portion sizes for American foods (lentils, rice, vegetables, fruits, yogurt, cottage cheese, eggs), recommended texture, and a sample American meal plan for the day.
I spent the first three months of weaning my daughter convinced she was starving. She would eat two spoons of porridge and turn her face away. I would chase her around the room with the bowl. Eventually my in-laws (after the third panicked phone call) said something I now repeat to every new mom: a baby who is not eating is not hungry. A baby who is hungry will eat. Trust her stomach. It is smarter than your spreadsheet.
These numbers are from WHO and AAP general guidelines — useful for the everyday cooking question. They are not a substitute for your pediatrician who knows your specific baby. For any concerns about weight gain, refusal to eat, or feeding difficulties, the doctor wins.
The actual feeding science, explained simply
Why two tablespoons at 8 months, why three meals at 9, where these numbers actually come from.
Where the calorie numbers come from
The daily calorie targets are from WHO Complementary Feeding Guidelines and the American Academy of Pediatrics (AAP) infant feeding recommendations. Both organisations have studied infant nutrition for decades. The numbers are not made up. They come from measuring what well-nourished babies of various ages actually consume.
Why we ask for your baby's weight
Two babies of the same age can be quite different. A chubby 9-month-old needs more food than a small one. Body weight is the best predictor of calorie needs after age. Roughly 80-90 kcal per kg of body weight per day for active babies in this age range.
We compare your baby's weight against WHO weight-for-age standards (50th percentile reference). If your baby is significantly above or below average, we gently nudge portions up or down. This is just a starting point. Your baby is the final authority. If she stops eating, the meal is over.
Why feeding type matters
An exclusively breastfed 8-month-old already gets around 400-500 kcal from breast milk. So her solid food only needs to provide another 200-300 kcal. A fully weaned 8-month-old gets nothing from breast or formula and needs the full target from solids.
Why we count meals AND snacks separately
Baby stomachs are small (roughly the size of their fist at this age). Trying to fit a full day's calories into 3 large meals does not work. WHO recommends:
American portion sizes. Tablespoons and katoris
American feeding traditions use spoons and small steel bowls (katoris) rather than grams and calories. We convert WHO recommendations into these familiar units.
Texture progression. Purees to family food
Texture matters as much as quantity. Stuck-on purees at 12 months means your baby will not learn to chew and may reject lumpy food permanently. Move texture forward gradually.
What about salt, sugar. Also butter?
This is where American feeding wisdom and modern pediatrics actually align well.
Foods to avoid before age 1
Reading hunger and fullness cues
Trust your baby. Babies are born knowing how much they need. Adult-style "finish your plate" feeding teaches them to ignore their own hunger and fullness signals. Which becomes a lifelong problem.
Things parents actually ask
My 8 month old only eats 2 tablespoons of lentils at lunch. Should I be worried?
What if my baby refuses solid foods entirely?
My baby is below the average weight for age. Do I increase portions?
How do I know if my katori is the right size?
Why does my baby eat so much one day and almost nothing the next?
Do these portions include breast milk or formula feeds?
What about water? How much should my baby drink?
Should I give my baby salt and sugar?
My doctor said to give multivitamins. Should I follow that?
Is this calculator a substitute for my pediatrician?
How baby feeding guidance works in the US
Pediatric care in America has too many decision points. Most parents do not realize this until midnight on a Tuesday. Your pediatrician handles routine stuff. After hours though, you have options to sort through. Nurse triage line that comes with your pediatric practice, free. Telehealth like Teladoc or Amwell, usually a small copay through insurance. Urgent care clinics, the CVS MinuteClinic and Walgreens Healthcare type places, around $100 to $150 cash. ER for actual emergencies, anywhere from $500 to $3000 even with insurance. Choice depends on baby age, severity of what is going on, and your insurance situation. Under 3 months with any fever (100.4 Fahrenheit, 38 Celsius), skip the decision tree completely. Go straight to ER. AAP is firm on that one.
For emergencies in the US: call 911. For non-emergency advice, call your pediatrician or the Poison Control Center at 1-800-222-1222. Telehealth services like Teladoc. Plus Amwell and MDLive offer 24/7 pediatric consultations covered by most insurance plans. Call 211 for community resources.
What American moms actually deal with
American parents get conflicting advice from every direction. Wellness industry says lavender oil for everything. Some of those oils are actually unsafe for babies under 2 years old. Online mom forums swing from "every fever is fine, just wait it out" to "rush to the ER right now." Pediatricians want measured responses based on evidence. Insurance companies want you to call the nurse line first. None of these voices is entirely wrong. Just incomplete. AAP guidance is consistent and worth trusting more than Instagram momfluencers. For babies over 3 months, watchful waiting with Tylenol or Motrin and good hydration is fine for 24 to 48 hours unless something concerning develops. Under 3 months, any fever is an ER visit. No exceptions, no waiting it out.