You can weigh your baby at home using either a dedicated infant scale or a simple subtraction method with your bathroom scale. Both approaches work, but consistency matters more than the tool you choose. Weighing the same way, at the same time of day, gives you the most useful picture of your baby’s growth.
The Bathroom Scale Method
This is the quickest option if you don’t want to buy new equipment. Step on your digital bathroom scale alone and note your weight. Then pick up your baby and step on again. Subtract your solo weight from the combined weight, and the difference is your baby’s weight.
The obvious limitation is precision. Most bathroom scales measure in half-pound or even one-pound increments, which is a big margin when your baby only gains about 1 ounce (28 grams) per day in the first few months. You won’t catch day-to-day changes this way, but you can track general trends over a week or two. If your scale reads in 0.2-pound increments, you’ll get somewhat better resolution.
Using a Dedicated Baby Scale
A baby scale designed for infants measures in much smaller increments, typically 5 or 10 grams (roughly a third of an ounce). This makes it possible to see meaningful changes from one day to the next. You can buy one for $30 to $60, and some parents’ groups or lactation consultants offer them as loaners.
Two features make baby scales easier to use than they might sound. A “hold” function freezes the reading on the display once it stabilizes, so your baby’s squirming doesn’t make the number jump around. A “tare” function lets you zero out the weight of a blanket or towel placed on the scale first, so you get just your baby’s weight. You can also use tare to measure milk intake: weigh your baby before and after a feeding without changing the diaper in between, and the difference is roughly how much milk they consumed.
Getting a Consistent Reading
The number on the scale only means something if you measure the same way each time. Children’s Hospital of Philadelphia recommends weighing your baby naked and without a diaper, since clothing and diapers vary in weight. A convenient time is during a diaper change or right before bath time, when your baby is already undressed.
Try to weigh at the same time each day. A baby can weigh noticeably more after a feeding than before one, and a wet diaper adds a couple of ounces. Morning, before the first feed, tends to give the most stable baseline. Place the scale on a hard, flat surface and make sure it isn’t touching a wall or furniture, which can throw off the reading.
How Much Weight Gain to Expect
In the first few months of life, babies gain about 1 ounce (28 grams) per day on average. That works out to roughly 5 to 7 ounces per week. After around four months, the pace slows, and by six months most babies have doubled their birth weight.
It’s normal for newborns to lose weight in the first few days after birth, sometimes up to 7 to 10 percent of their birth weight. They typically regain it by 10 to 14 days old. If your baby lost more than 10 percent during those first days, your pediatrician has likely already discussed a monitoring plan with you.
Day-to-day fluctuations are normal and don’t tell you much on their own. A single low reading after a big diaper blowout doesn’t mean anything is wrong. What matters is the trend over several days or a week. Plotting weights on a growth chart (your pediatrician’s office uses WHO charts for babies under two) lets you see whether your baby is following a consistent curve.
Other Signs Your Baby Is Getting Enough
Weight is one piece of the puzzle, but it’s not the only indicator of healthy intake. Diaper output is a reliable daily signal. Six to eight wet diapers a day is normal for an infant. Fewer than three or four wet diapers a day can be a sign of dehydration.
Your baby’s mood and energy level matter too. A baby who feeds actively, has periods of alertness, and seems satisfied after most feedings is generally doing well. Persistent sleepiness, a weak cry, or refusing to feed are more immediate red flags than a single weigh-in that seems low.
How Often to Weigh
For most healthy babies, weighing once a week at home gives you useful data without creating unnecessary stress. Daily weighing is sometimes recommended by a pediatrician or lactation consultant for specific situations, like monitoring a premature baby or troubleshooting breastfeeding challenges. Outside those cases, daily weigh-ins can do more harm than good.
Research published in Maternal & Child Nutrition found that concerns about newborn weight loss are a strong predictor of maternal anxiety, and that anxiety at two weeks postpartum significantly increases the likelihood of stopping breastfeeding before two months. Watching tiny daily fluctuations that fall well within the normal range can fuel worry that undermines feeding confidence. If you find yourself feeling anxious about the numbers, stepping back to weekly weigh-ins (or relying on diaper counts and scheduled pediatric visits) is a reasonable move.
The AAP emphasizes that accurate weight monitoring is essential for catching growth problems early, but the clinical weigh-ins at your baby’s well-child visits (typically at 3 to 5 days, 1 month, 2 months, 4 months, and 6 months) are calibrated to catch issues at the right intervals. Home weighing fills in the gaps when you or your baby’s care team want closer tracking, not as a replacement for those visits.