Breastfeeding Calorie Calculator
Find out how many calories you need each day while nursing or pregnant. Get your daily target, a meal plan split, macros and water in seconds.
Your details
Your result updates as you type.
Wait until breastfeeding is well established (about 6–8 weeks) before trying to lose weight.
Your result
Fill in the form and your daily calories will show up here.
| Breakdown | kcal/day |
|---|---|
| Resting energy (BMR) | 0 |
| Plus daily activity | 0 |
| Plus breastfeeding | 0 |
| Weight goal adjustment | 0 |
| Total per day | 0 |
| Daily macros | Grams/day |
|---|---|
| Protein (10–35%) | |
| Carbs (45–65%) | |
| Fat (20–35%) |
| Easy meal split | kcal |
|---|
This is an estimate (Mifflin–St Jeor formula plus the extra energy for milk production or pregnancy). Eating too little can lower your milk supply and leave you tired, so avoid sharp cuts. It is not medical advice, so speak with your doctor or midwife about your own needs.
How Many Calories Do You Need While Breastfeeding?
Making milk takes energy, so most breastfeeding mothers need to eat more than they did before pregnancy. The calculator above gives you a personal number in a few seconds. This guide explains where that number comes from, what the extra food actually looks like on a plate, and how to eat well without feeling like you are doing sums all day.
How to calculate your breastfeeding calories
There are three simple steps, and the calculator does all of them for you.
- Work out your resting energy (BMR). This is what your body burns just to stay alive. For women, the Mifflin–St Jeor formula is: (10 × weight in kg) + (6.25 × height in cm) − (5 × age) − 161.
- Multiply by your activity level. Use 1.2 if you mostly sit or rest, 1.4 for light activity such as daily walks with the stroller, 1.6 for moderate exercise a few times a week, and 1.75 or more for hard training. Be honest here. Looking after a newborn is tiring, but it is not the same as a workout, so most new mothers sit between 1.2 and 1.4.
- Add the breastfeeding extra. Add 330 calories if your baby is under six months, or 400 calories if your baby is older.
Example 1: Amna, baby of 4 months
Amna is 30 years old, weighs 65 kg, is 163 cm tall, and has a four-month-old baby. She walks daily with the stroller, so her activity factor is 1.4. Her BMR is about 1,358 calories. Multiplied by 1.4, she needs about 1,901 calories for herself, plus 330 for breastfeeding, which comes to about 2,231 calories a day.
Example 2: Hira, baby of 8 months
Hira is 33 years old, weighs 70 kg, is 165 cm tall, and has an eight-month-old baby. She is mostly at home, so her activity factor is 1.2. Her BMR is about 1,405 calories. Multiplied by 1.2, she needs about 1,686 calories, plus 400 for breastfeeding, which comes to about 2,086 calories a day.
Why breastfeeding needs extra calories
Producing milk uses roughly 500 calories a day. The recommended extra is lower than that because your body also draws on the fat it stored during pregnancy. This is one reason many women lose weight gradually while nursing even without trying. It is also why you should not copy a friend's number. A mother who is feeding twins, or whose baby feeds very often, may be hungrier than one whose baby has started solid foods.
What 330 extra calories actually look like
You do not need a special diet, just a couple of extra snacks or slightly bigger meals. These are easy ways to add around 300 to 400 calories. The numbers are approximate and will vary with brand and portion size.
| Snack or mini meal | Approx. calories |
|---|---|
| 1 banana with 2 tablespoons of peanut butter | 300 |
| 1 cup of plain whole-milk yogurt with a small handful of almonds | 340 |
| 2 eggs on whole-grain toast with half an avocado | 360 |
| Half a cup of oats cooked in milk, topped with a few walnuts and a spoon of honey | 400 |
| Hummus (4 tablespoons) with pita bread and carrot sticks | 340 |
Choose foods that also give you protein, fibre, healthy fats, iron and calcium, because your body is using nutrients as well as energy. Plain biscuits and sweets have calories, but they will not keep you full.
Can you lose weight while breastfeeding?
Yes, but slowly, and not too soon. Your body needs the first six to eight weeks or so to settle into a steady milk supply and to recover from the birth, so this is not the time to diet. Once breastfeeding is going well, a loss of about 0.5 kg (1 pound) per week is a gentle pace that most women can keep up without feeling drained. Aim to eat a little below your calculated number rather than far below it, and avoid going under about 1,800 calories a day unless a doctor has told you otherwise. Light exercise such as walking is a good way to support weight loss without cutting food too hard.
Signs you may not be eating enough
- You feel exhausted or dizzy most of the day, beyond ordinary new-parent tiredness.
- You are hungry all the time and skipping meals because you are too busy.
- You are losing weight faster than about 0.5 kg a week.
- Your milk seems to be dropping, or you feel faint while nursing.
If this sounds like you, add a snack or two from the table above and speak with your doctor, midwife or a lactation consultant if it does not improve.
Simple ways to eat enough on a busy day
- Keep snacks you can eat with one hand near your feeding spot: nuts, dates, bananas, cheese cubes, boiled eggs.
- Have a glass or bottle of water within reach, and drink when you are thirsty.
- Cook bigger batches and freeze portions, so a proper meal is always a few minutes away.
- Eat when you are hungry. Your appetite is often a better guide than a number.
Frequently asked questions
You need less. The 330 and 400 calorie figures are for mothers who breastfeed most of the time. If your baby also takes formula or eats a lot of solids, your extra needs are lower, so let your hunger guide you.
Yes. What matters is how much milk you produce, not whether it goes into a bottle or straight to the baby.
A small, sensible reduction usually does not. Very low intake, especially in the early weeks, can leave you exhausted and in some cases affect your supply, which is why a gradual approach works best.
Most mothers wait until breastfeeding is well established, usually after the first six to eight weeks. Until then, focus on eating enough, resting when you can and drinking to thirst.
For a personal number, enter your details into the calculator at the top of this page. If you also want to know your everyday calorie needs without the breastfeeding extra, try our maintenance calorie calculator.
These figures are estimates and not medical advice. Speak with your doctor, midwife or a lactation consultant about your own needs.