150 ml bottle at 1:30
Input Water 150 ml, 1 scoop per 30 ml, 4.4 g per scoop.
Result 5 scoops = 22.0 g of powder, giving about 167 ml of prepared formula.
Baby Formula Calculator
Everyday LifeGet the exact scoop and powder weight for a bottle, or plan a whole day of feeds from your baby’s weight.
Your inputs
Result
Scoops
—
- Formula powder — g
- Water — ml
- Prepared volume — ml
- Per feed — ml
- Feeds —
Change any input and the result updates instantly.
Formula and rules
- Scoops = water ÷ millilitres per scoop
- Powder weight = scoops × grams per scoop
- Prepared volume ≈ water + powder × 0.75 ml per gram
- Daily water = body weight × ml per kg (150 ml/kg is the usual guide up to six months)
- Per feed = daily water ÷ feeds per day
- Always follow the ratio printed on the tin — it differs between brands
Worked examples
4.2 kg baby, 8 feeds
Input Weight 4.2 kg, 150 ml/kg/day, 8 feeds, 1 scoop per 30 ml.
Result 630 ml a day, about 79 ml per feed, 21 scoops and 92.4 g of powder in total.
210 ml bottle at 1:60
Input Water 210 ml, 1 scoop per 60 ml, 4.4 g per scoop.
Result 3.5 scoops = 15.4 g of powder, close to the US two-ounce scoop convention.
FAQ
Can I add extra powder for a hungrier baby?
No. Over-concentrated formula overloads the kidneys and can cause dehydration. If your baby still seems hungry, offer more volume or ask your paediatrician rather than changing the ratio.
How much formula does a newborn need?
A rough guide is 150 ml per kilogram per day, split over 6–8 feeds, and fed on demand. Growth, weather and appetite all move that number, so weight gain matters more than exact millilitres.
Why do some tins use 30 ml and others 60 ml per scoop?
Scoop size and powder density differ between brands and countries, so the ratio on the tin is the only safe reference. Never carry a ratio from one brand to another.
Disclaimer: This estimate follows common feeding guidance and does not replace individual advice from a paediatrician or dietitian. For premature babies, low birth weight or any medical condition, follow your clinician’s instructions on volume and mixing ratio.