Note: A weighted feed is one piece of a bigger picture. If your baby is feeding fewer than 8 times in 24 hours, hard to rouse, showing low diaper counts, or losing weight, contact your pediatric clinician promptly. This article explains a common assessment tool, not a diagnosis for your baby.
One of the hardest parts of breastfeeding is not being able to see the ounces. With a bottle you know exactly what baby took. At the breast, you are reading swallows, diapers, and weight over days and hoping it adds up. A weighted feed is a simple way to turn some of that guessing into an actual number.
What a weighted feed is
A weighted feed measures how much milk your baby takes in a single breastfeeding session. Using a sensitive infant scale, we weigh baby right before the feed and again right after, without changing anything in between, not even a diaper. The difference in weight is the amount of milk transferred. One gram of weight gained equals about one milliliter of milk taken. It is a well-established method used by lactation consultants and in many clinics.
How it works, step by step
We weigh baby fully clothed, in the same diaper and outfit they will feed in. Baby breastfeeds as they normally would, on one or both sides. Then we weigh baby again in exactly the same clothing and diaper, even if it is now wet. Because the only thing that changed is the milk in baby's tummy, the difference tells us the intake for that feed. If you ever want to see how the math works, our weighted feed calculator walks through it.
If you want to weigh at home
Home baby scales vary a lot in accuracy, and an ordinary bathroom or kitchen scale is not precise enough for a true weighed feed, which relies on catching a difference of just a few grams. If you want to track feeds at home, look for a sensitive digital baby scale that reads in grams. The Tanita below is the clinical-style scale many lactation consultants use.
You do not have to buy one, though. Current clients can rent a baby scale from The Breastfeeding Cafe for $25 per week when one is available, so you can do weighed feeds at home during the stretch when it is most helpful. Just ask Liz at your consult.
What the number tells you, and what it does not
A weighted feed is a snapshot of one feed, not a verdict on your whole supply. Babies take different amounts at different times of day, and a single low or high number is normal variation. What it does give us is real information: whether baby is transferring milk effectively at the breast, roughly how much on that occasion, and how that compares to what a baby that age typically needs. Paired with a good latch assessment and your baby's diaper and growth history, it helps replace worry with a plan.
When a weighted feed is worth doing
Families often ask for one when weight gain has been slow, when baby seems hungry soon after feeding, when you are working to reduce bottles or come off a nipple shield, or when you simply want reassurance that feeds are doing their job. It is also helpful for premature or sleepy babies, or any time the question is "is baby actually getting enough at the breast?" For more on reading intake without a scale, see signs baby is getting enough milk.
What we do with the result
The number is only useful if it leads somewhere. In a consult we use it alongside latch, positioning, and your goals to shape next steps, whether that is adjusting latch to improve transfer, fine-tuning a supplementing or pumping plan, or reassuring you that things are on track and you can stop counting. We coordinate with your pediatric team when weight is a concern. If milk supply worries are what brought you here, our guide on milk supply worries and next steps is a good companion read.
When lactation support helps
You do not need a scale at home to get answers. A consult is a chance to watch a full feed together, do a weighted feed if it is useful, and build a plan that fits your family. Reach out if weight gain is slow, if you are triple feeding, if you are unsure baby is transferring well, or if you are just tired of guessing. Supplementing or combo feeding does not disqualify you from support.