How many calories do you need while breastfeeding? This free calculator estimates your daily needs — your maintenance plus the extra energy milk production takes — to support healthy feeding, not dieting.
ℹ️ Informational only, not medical advice. Breastfeeding raises your energy needs — under-eating can reduce milk supply and affect your health, so this tool estimates calories to support breastfeeding and does not suggest dieting. For advice tailored to you, speak with a doctor, midwife or lactation consultant.
About you
yrs
cm
kg
ftin
lb
Estimated daily calories
— kcal/day
Fill in your details
Maintenance (no feeding)
—
Breastfeeding add-on
—
An estimate to support healthy breastfeeding. Some of this energy may come from pregnancy fat stores, so needs vary, and gradual postpartum weight change can be normal. Eat to appetite with nourishing foods, stay hydrated, and seek professional advice rather than restricting calories.
Use this free breastfeeding calorie calculator to estimate how many calories you need while nursing. Enter your details and breastfeeding level to see your daily calories, including the extra energy milk production takes.
Important: breastfeeding increases your energy needs, and under-eating can reduce milk supply and affect your health. This tool estimates calories to support breastfeeding — it does not suggest dieting. For advice tailored to you, speak with a doctor, midwife or lactation consultant.
What this breastfeeding calorie calculator shows you
A breastfeeding calorie calculator adds the energy cost of making milk to your normal maintenance calories. Exclusive breastfeeding uses roughly 500 extra calories a day, so the tool estimates your maintenance needs and adds an amount based on how much you’re breastfeeding.
A moderately active person with a maintenance of about 2,170 kcal who is exclusively breastfeeding would need roughly 2,670 kcal a day.
Extra calories by breastfeeding level
Level
Extra calories/day
Exclusive (baby’s only food)
~500 kcal
Mostly breastfeeding
~400 kcal
Partial / combination feeding
~330 kcal
Minimal / weaning
~150 kcal
Some of this energy may come from fat stored during pregnancy, which is why gradual, gentle weight change can be normal after birth without deliberately cutting calories.
Eating well while breastfeeding
Eat to appetite with nourishing, varied foods rather than counting strictly.
Stay hydrated — keep water nearby when you feed.
Don’t crash diet — it can reduce supply and leave you depleted.
Get support from a professional for weight, supply or nutrition concerns.
Breastfeeding Calorie FAQ
How many extra calories do you need when breastfeeding?
Roughly 330–500 extra calories a day, depending on how much you’re breastfeeding. Exclusive breastfeeding uses the most — about 500 a day on top of your normal needs.
How many calories should I eat while breastfeeding?
Your maintenance calories plus the breastfeeding add-on. For many people that’s around 2,200–2,700 a day, but it varies with your size and activity. The calculator personalises it.
Should I diet while breastfeeding?
Aggressive dieting isn’t advised — it can reduce milk supply and leave you depleted. Some gradual weight change is normal, but focus on eating well rather than cutting calories, and seek advice if concerned.
Where do the extra calories go?
Into producing milk. Some of the energy can also come from fat stored during pregnancy, which is why needs vary and gentle postpartum weight change is common.
Do I need to drink more water while breastfeeding?
Yes, breastfeeding increases fluid needs. A good habit is to keep water nearby and drink whenever you feed, letting thirst guide you.
Is the breastfeeding calorie calculator free?
Yes, this breastfeeding calorie calculator is completely free, needs no sign-up, and gives instant results in your browser. It is informational only and not medical advice.
