BMI Calculator Pregnancy – Pregnancy Weight Gain Calculator
During pregnancy increase in weight is quite common. Weight gain during pregnancy is a natural process that makes your body ready for “healthy baby development” but do you know excessive weight gain or weight loss can cause delivery complications as well.
To help you out, we have designed a highly accurate BMI pregnancy weight gain calculator. BMI pregnancy calculator will help you to find out your ideal weight range in a particular pregnancy week. you can easily know and track your ideal weight gain with this calculator. In this article, you’ll learn how weight increases in women during pregnancy and how it affects fetal growth. We’ll also tell you how much weight gain for a pregnant woman is good for her baby’s health.
Changes in the body during pregnancy
Pregnancy 3 trimesters are full of ups and downs for all women. Each day you will experience something new emotionally and physically. During this time Your body is making itself ready to make a completely new life. your baby’s size will grow from 1 inch to 21 inches and at the same time baby’s organs, bones, and neurological development will also take place. In these 3 trimesters mother’s womb is the only source of energy and vitamin for the baby. To read in detail about this also read our latest article this Everything about your Pregnancy – BEST MOM BABY CARE and (Answer to all your queries about Trimester – BEST MOM BABY CARE).
A few common changes in the body during pregnancy are :
First trimester |
• Morning Sickness • Vomiting and Nausea • Increased sense of smell • Frequent swing in mood • Changes in Breast size • Constipation • Mild to moderate Cramping • Weight gain of 1 to 2 kg. • Headache |
Second trimester |
• Congestion • Lesser morning sickness and mood swings. • Craving for your favorite food may increase. • Mild swelling in feet • Changes in smell and taste senses. • round ligament pain • cramps in leg |
Third trimester |
• Frequent urination • Swollen feet • leg cramps • heartburn • varicose veins • backache • fatigue • Shortness of breath especially during the last week of pregnancy • labor pain at small intervals a few hours before delivery. |
Why do you gain weight during pregnancy?
Weight gain in pregnant women usually starts from the 20th pregnancy week onwards but this weight gain varies from one woman to another. Usually, it remains in the range of 10 kg to 12 kg for most pregnant women. Much of this weight is your baby, but also amniotic fluid, the placenta, your breasts (your body will also be storing fat, ready to make breast milk after your baby is born), increased blood supply, and an enlarging uterus. Put on too much or too little weight could lead to health-related problems for you or your unborn baby.
What are body mass indexes?
Body mass indexes (BMI) in simple laymen’s words are just measuring your body fat. To measure Fat scientist has designed a formula that uses your weight and height to calculate your Fat level in the body. A body mass index categorizes a person into one of four categories. These are
Body Mass Indexes | |||
Under Weight | Normal Weight | Over Weight | Obese Weight |
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BMI value- 0 to 18.5 | BMI value- 18.5 to 24.9 | BMI value- 25 to 29.9 | BMI value- 30 or more |
Tell me the BMI?
If you want to know your Body Mass Index (BMI) then use the below BMI Calculator Pregnancy – Pregnancy Weight Gain Calculator which is based on WHO weight gain recommended guidelines. This BMI pregnancy calculator will give lots of insight into your body fat and your ideal weight range during pregnancy.
To check your BMI value click here

BMI calculator for pregnancy
Check your BMI result here
To check your BMI value click here
To know your ideal weight range per week result click here.
How to calculate your BMI during pregnancy?
Calculating BMI when you are pregnant isn’t difficult. All you need to do is just use our highly customized and accurate BMI pregnancy calculator -Weight gain Calculator. To Know your BMI just follow the below-given steps and you will get your exact value of BMI during pregnancy.
Step 1) Enter your Height value either in feet and inches or meters.
Step 2) Select the unit (feet and inches or meter) of height value.
Step 3) Enter your Pre-Pregnancy Weight either in pounds or kilograms.
Step 4) select the unit of weight value (pounds or kilogram).
Step 5) Enter your current weight value.
Step 6) Click on Check your BMI.
Step 7) To Check your BMI result and other useful insights click here.
Pregnancy weight gain by week and by trimester
Below we have designed a customized table for your ideal weight gain range by week and by trimester. In this table, you will get your ideal weight range for each pregnancy week or trimester
What happens if my BMI is not in the healthy weight range?
Too low or too high BMI is always a matter of concern in pregnancy .it can cause health issues to you and your baby. Low BMI means your body is not storing enough fat for your baby and may become the cause of your baby’s premature birth. On the other hand, a High BMI can cause serious complications during delivery which is not safe for the baby as well as the mother. Below we have discussed in detail the unhealthy BMI during pregnancy and its complications.
If your BMI is under 18.5
in most cases, the BMI of pregnant women before pregnancy is low which is fine. But if after pregnancy if weight gain is still low even after the 20th week then it can increase the risk of premature baby birth (i.e baby may be born before they are fully developed), gastroschisis (i.e baby’s stomach does not develop properly in the womb ) and a baby born with low birth weight.
Tell me the best way to gain weight during pregnancy?
There are different ways to gain weight during pregnancy. With the below simple tips you can easily gain increase your weight and attain your ideal weight range, here are some tips to help:
- Eat more frequently – Eat 5 to 6 small meals every day, and never skip your meals.
- A few pieces of dry fruits including cashew nuts, almonds, and raisins are a good way to start a day.
- Snacks like raisins, cheese and crackers, and ice cream or yogurt are good choices in your diet plan.
- Peanut butter toast, boiled pulses, apples, bananas, or celery can add sufficient calories to your diet.
- Include Dairy products such as cheese milk, Yogurt, etc –one cup of milk or yogurt thrice a day will fulfill your dairy product need in the diet.
- Green Vegetables such as broccoli, and spinach are iron-rich food for your diet.
- Lean Meat, eggs, and legumes such as lentils, peas, beans, and soybeans are rich sources of protein. Eat protein-rich food such as 2-3 ounces of meat, 2 eggs, or 1 cup of legume twice or thrice a day.
- Whole grain and fresh foods can help you to get sufficient fiber for your body and keep your digestion good.
- Fruit Juices are high in vitamin C or beta carotene. Fruit juice like Grapefruit juice, orange juice, papaya nectar, apricot nectar, and carrot juice are good choices.
- Always keep yourself hydrated, drink ample water throughout the day, and never miss your prenatal vitamins and other supplements.
- See a dietitian or nutritionist or your doctor for a customized diet plan, which suits your body and baby’s growth.
If your BMI is over 40
High BMI or obese category BMI could become cause certain risks and pregnancy complications among women. Obese women can have high blood pressure (7.8 percent (High BMI) vs. 2.6 percent ( Normal BMI) ) during pregnancy and there are more chances of gestational diabetes (3 percent ( High BMI) vs. 0.1 percent( Normal BMI)) in them. Apart from those other issues like urinary tract infection, kidney issues, problems with normal vaginal delivery, high bleeding following delivery, and the possibility of birth-related defects in fetuses can also occur.
What if I gain too much weight?
If you gain too much weight then you can try these simple daily routine changes which will help you to improve your body metabolism and bring your weight to the ideal weight range.
- Increase the number of cereals in your diet.
- Consume more legumes, vegetables, and fruit items.
- Avoid junk food such as high sugar drinks or oily food items.
- Increase protein content in your diet.
- Daily do light exercise for 15 to 20 minutes like slow pace walking and swimming exercise.
- Do meditation for 20 minutes daily.
- Consult with your dietitian/ nutritionist or your doctor and get your customized diet plan chart.
FAQ
Is obesity a risk factor for pregnancy?
Yes, obesity is a risk factor for pregnancy. Few complications such as urinary tract infection, kidney issues, problems with normal vaginal delivery, and high bleeding following delivery can occur in pregnancy due to obesity. you must consult with your doctor and get a proper diet chart and exercise schedule for your pregnancy to avoid complications in the later stages
Do I gain weight faster during my second pregnancy?
Yes during the second and third trimesters your weight will increase faster than in the First trimester. During the first trimester, your weight will increase from 2 lbs (1 kg) to 4 lbs (2 kg) only, and afterward, your weight will increase by approx 1 lbs (0.45 Kg ) per week.
How much weight will I gain during pregnancy if I weigh 122 lbs?
To know your exact ideal weight range throughout your pregnancy do use of BMI pregnancy calculator – Weight Gain Calculator.
Great article and your BMI calculator is showing correct value