How much milk & formula will you need?

A common rule of thumb is about 2.5 ounces per pound of body weight per day, leveling off around 24 to 32 ounces a day by a few months old and then tapering as solids begin. This calculator follows a smooth intake curve by age so you can see the day-by-day amount across your whole plan. Every baby is different, so always follow your pediatrician's guidance.

Each source works one of three ways. On demand covers whatever the other sources don't. A set amount is a fixed number of ounces or feeds a day (for nursing, a share of the day), tapering evenly from its start value to its end value across your dates. A daily minimum guarantees at least so many feeds or ounces a day even while a source is on demand, and a daily maximum caps an on-demand source at so many feeds or ounces, passing the rest of that day to the next source. Set amounts and minimums come off the top first, then the on-demand sources fill the rest, in the order nursing, then pumped milk, then formula. If your set amounts add up to more than the baby needs on a day, the extra is flagged and left out of the totals. If a day isn't fully covered, the shortfall is flagged too, so you can adjust until the plan adds up.

Amounts can change over the plan in one way: a set amount tapers evenly from its start value to its end value across its own dates. That handles a steady ramp up or down, but not stage-by-stage changes. If your plan shifts from month to month, with different amounts at different points or a switch partway through, run it as shorter plans (say a month at a time) using the numbers for each stretch, then add the results together. The full-year view is best for a quick sanity-check; shorter plans give you finer control.

It depends on how much of the diet is formula, for how long, and your can size. Enter your feeding mix and dates, turn on cost estimates, and the calculator totals the ounces of formula, converts that to whole cans at your can size, and multiplies by your price per can.

Size the stash to the ounces you plan to feed from frozen milk over your date range, plus a little cushion. Enter your pumped-milk plan and the calculator shows total ounces and storage bags needed, and how far a stash you already have will stretch.

The optional time step multiplies your typical sessions per day and minutes per session across the plan to estimate total hours, so you can budget your time along with your money.

No. It is an independent planning and budgeting tool, not medical advice, and it does not store the numbers you enter. Always follow your pediatrician or a qualified health provider on your baby's feeding amounts and nutrition.