Baby Feeding Calculator
How much formula or expressed milk your baby needs — per feed and per day — by weight and age. Switch between ounces and millilitres.
3.1 oz
per feeding
8
feeds / day
25.0 oz
per day
At 10 lb, a formula-fed baby this age needs about 25.0 oz a day across ~8 feeds. 8–12 feeds a day is normal — feed on demand.
Formula amount by weight
| Baby's weight | Total per day | ~Per feed (newborn) |
|---|---|---|
| 6 lb | 15.0 oz | 1.9 oz |
| 8 lb | 20.0 oz | 2.5 oz |
| 10 lb | 25.0 oz | 3.1 oz |
| 12 lb | 30.0 oz | 3.8 oz |
| 14 lb | 32.0 oz | 4.0 oz |
| 16 lb | 32.0 oz | 4.0 oz |
A general guide, not medical advice. Based on the widely-used pediatric rule of ~2.5 oz per pound per day (max ~32 oz), per AAP / HealthyChildren.org. Every baby is different — feed on demand and follow your pediatrician's guidance, especially for preterm or low-weight babies.
Frequently asked
How much formula does my baby need by weight?
A common pediatric guide is about 2.5 ounces of formula per pound of body weight per day, up to a maximum of around 32 oz/day. A 10 lb baby would take roughly 25 oz across the day. Always feed on demand and follow your pediatrician.
How many ounces per feeding for a newborn?
Newborns usually take 1.5–3 oz every 2–3 hours (8–12 feeds a day), increasing as they grow. Divide the daily total by the number of feeds to estimate per-feeding amount.
Does breast milk use the same amount?
Roughly yes — exclusively breastfed babies take a similar total of about 24–32 oz a day once feeding is established, though the breast self-regulates. This calculator estimates expressed-milk or formula volume.
When does formula intake stop increasing?
Total intake plateaus near 32 oz a day around 6 months, when solid foods begin to replace some milk calories. After that, milk volume gradually decreases.