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Formula-fed babies need about 150 ml per kg of body weight a day up to 6 months (UK NHS guidance) — in US terms about 2.5 oz per pound, up to 32 oz a day. Enter the weight and age to get the daily amount, the size of each bottle and the number of scoops.
These are averages: let your baby lead, stopping when they turn away or slow down. From 6 months, formula continues alongside solid food until 12 months.
| Baby's Weight | 6 |
| Weight Unit | kg |
| Age | 3 months |
| Scoop Size | 1 scoop per 30 ml (1 oz) — most brands |
| Formula per day | 900 ml (30 oz) |
| Per feed | 150 ml (5.1 oz) × 6 feeds a day |
| Scoops per feed | 5 level scoops (1 scoop per 30 ml water — check your tin) |
| US rule (2.5 oz per lb per day) | 32 oz (946 ml), max 32 oz |
900 ml (30 oz); 150 ml (5.1 oz) × 6 feeds a day.
Try this example →| Baby's Weight | 7.5 |
| Weight Unit | lb |
| Age | 0.5 months |
| Scoop Size | 1 scoop per 30 ml (1 oz) — most brands |
| Formula per day | 510 ml (17 oz) |
| Per feed | 65 ml (2.2 oz) × 8 feeds a day |
| Scoops per feed | 2.1 level scoops (1 scoop per 30 ml water — check your tin) |
| US rule (2.5 oz per lb per day) | 19 oz (555 ml), max 32 oz |
510 ml (17 oz); 65 ml (2.2 oz) × 8 feeds a day.
Try this example →In the first days just 30–60 ml (1–2 oz) per feed, 8–12 times a day, building to about 150 ml per kg a day by the end of the first week.
About 750–900 ml (25–30 oz) a day, in 5–6 bottles of 150–180 ml.
Most powders use 1 level scoop per 30 ml (1 oz) of water — always follow the tin.
About 960 ml (32 oz). Babies needing more are usually ready for solids or need a doctor's review.