It's difficult to know how much milk a baby actually gets when she's directly feeding from the breast, but you'll want to make sure that you're not overfeeding when you give your baby a bottle.
Here is the calculation for supplementing breast milk in a bottle:
- Convert the baby's weight to ounces. (Don't forget to add those extra ounces in!) One pound equals 16 ounces.
Example: An 8 lb., 4 oz. baby will be 132 ounces.
- Take the baby's weight in ounces and divide by 6.
Example: 132/6 = 22.
- Take that number and divide once again by 8 (for 8 feedings/day). This will bring you to the amount that should be in the bottle for one supplemented feed.
Example: 22/8=2.75 oz.
Keep in mind that your baby may be interested in having more than the calculated amount. This is a general recommendation. In addition, you'll want to adjust these amounts as your baby has more current weight checks.