Free Tool for Nursing Mamas
Making milk is real work, Mama. Enter a few details and see how many calories your body burns nursing — plus your personalized daily fuel, protein & water targets.
What this means: your body is burning energy around the clock to make milk. The goal isn't to eat less — it's to eat enough, with protein and fluids at every feed so your energy holds. Grazing counts. Bowls and handfuls count.
On water: aim for roughly — oz a day (your — cups above). Easiest trick, Mama: keep a full glass wherever you feed and sip through each session — thirst hits hardest mid-feed. Hydration is about keeping you feeling good; it isn't a lever for supply.
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Knowing you need about — calories and 71g of protein a day is the easy bit. Hitting it on three hours of sleep is what we're built for — here's how, from a $5 head start to done-for-you.
You just saw your water and protein numbers — this is the printable snack & hydration playbook to actually hit them, one hand free.
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A research-backed nutrition insight, a real Mama Q&A, and a fresh one-handed recipe in your inbox every Tuesday — support for the whole feeding season.
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Producing breast milk uses roughly 450–500 extra calories a day while you're exclusively nursing a baby under six months. Your body covers part of that from the fat stores your body built during pregnancy, which is why most nursing parents are guided to eat about 330–400 extra calories a day from food — not the full 500.
As your baby starts solids (around 6–12 months) and takes a little less milk, the calorie cost tapers, and combo feeding with formula lowers it further. That's why the calculator asks how you're feeding right now — the number is different for every stage.
A good target for most nursing Mamas is around 13 cups (about 104 oz) of fluids a day — the calculator personalizes that to your weight and feeding stage, because a bigger body and exclusive nursing both need a little more. Every ounce of milk you make is mostly water, so your body simply asks for more back.
The simplest rule beats any number, though: drink to thirst, and keep a full glass wherever you feed. Thirst tends to spike right at letdown, so a glass you have to get up for is a glass you won't drink. A quick gut-check is the color — pale-lemonade is the goal; you don't need to count ounces.
One honest note, Mama: hydration helps you feel good and steady, but it isn't a switch for milk supply — that's a conversation for an IBCLC or your provider, not something to solve by chugging water. And you don't need to over-drink; more isn't better past comfortable.
Roughly 450–500 extra calories a day for exclusive breastfeeding under 6 months. Because some of that comes from fat stores, most Mamas are guided to eat about 330–400 extra from food.
The extra calories are replacing what your body spends making milk — you're fueling a job your body is already doing. Eating enough is what protects your energy and, for many, your supply. Weight changes vary person to person; your provider can help you personalize.
Yes — the calorie cost is about the volume of milk you make, not how it leaves. Exclusive pumping is treated the same as exclusive nursing here.
A common target is about 13 cups (≈104 oz) of fluids a day, but the simplest rule is to drink to thirst and keep a full glass wherever you feed.
We don't guess — every number here maps to recognized public-health guidance:
A word on precision, Mama: even the best equations land within about ±10% for most people, and every body is different — so treat this as a well-grounded starting point, not a to-the-calorie prescription.
Sources: CDC — Maternal Diet & Breastfeeding · National Academies — Dietary Reference Intakes for Energy · Academy of Nutrition & Dietetics — resting metabolic rate · Dietary Reference Intakes during lactation (protein & water).