Pregnancy Weight Gain Calculator

To calculate weight gain in pregnancy: subtract your pre-pregnancy weight from your current weight. For example, if you weighed 60 kg before pregnancy and now weigh 70 kg, your weight gain is 10 kg. Then compare that to guideline ranges based on your pre-pregnancy BMI. For someone with normal BMI (18.5-24.9) the guideline is about 11.5-16 kg total for a singleton pregnancy.

At 32 weeks (~third trimester), gaining only 2 kg may be below typical expectations if you started at a normal weight. For women with normal BMI, after the first trimester weight gain tends to average ~0.4 kg/week in the 2nd & 3rd trimesters.If you have gained only 2 kg by week 32, you should check with your provider to ensure fetal growth and maternal nutrition are adequate.

Most of the weight gain occurs during the second and third trimesters (weeks ~ 14 to birth). The rate increases once the fetus grows more rapidly and maternal stores increase. The first trimester gain is small (≅ 0.5-2 kg) and then weight accrues more steadily.

It depends on your pre-pregnancy BMI. For singleton pregnancies: - Underweight (BMI < 18.5): ~12.5-18 kg. - Normal weight (BMI 18.5-24.9): ~11.5-16 kg. - Overweight (BMI 25-29.9): ~7-11.5 kg. - Obese (BMI ≥ 30): ~5-9 kg.

Gaining 20 kg may be within or above guideline depending on your pre-pregnancy BMI and whether you are carrying multiples. For example, for a normal BMI and singleton pregnancy the upper guideline is ~16 kg. If you gained 20 kg, that is above this guideline and worth discussing with your provider. For twin pregnancies the guideline is higher (~16.8-24.5 kg for normal BMI)

"7 months pregnant" corresponds roughly to about 28-31 weeks. There's no exact kg value tied to "7 months" since weight gain depends on starting BMI and individual variation. But if you had a normal BMI and aim for ~11.5-16 kg total, by 30 weeks you might expect to have gained majority of that range (e.g., ~8-12 kg) assuming steady gain. Your provider can use growth charts for a more precise target.

Staying "slim" isn't the primary goal - healthy weight gain for the baby and mother is the focus. But you can aim for *appropriate* gain by: eating balanced nutrient-rich meals, avoiding excessive calories, staying physically active with your provider's clearance, and monitoring weight gain. For example, a normal weight woman needs about an extra ~300 calories/day in the 2nd trimester. Always consult your healthcare provider before major diet/exercise changes.

Immediately after birth you'll lose the weight of your baby, placenta, amniotic fluid (and some blood/fluids). On average that's about 5-6 kg (~10-13 lbs) right away. Additional weight due to excess fluid may drop in the first few days. But losing pregnancy fat and returning to pre-pregnancy weight takes time.

"5 months pregnant" is roughly ~20-23 weeks. There's no fixed kilogram number for that specific month. Using guideline ranges (e.g., ~11.5-16 kg total for normal BMI), by 20-23 weeks you might expect to have gained perhaps ~6-8 kg if everything is proceeding normally - but this is a very rough estimate and individual variation is high. Your provider will track your specific growth curve.

By 12 weeks (end of first trimester) typical gain is small: about 1-2 kg (2-4 lb). If nausea/vomiting occur you may gain less. The major weight gain generally happens in 2nd/3rd trimesters.

There isn't a single "normal weight" in kg universally; what matters is your pre-pregnancy BMI (weight (kg)/height (m)²). A "normal" BMI is 18.5-24.9. So for someone 1.65 m tall, "normal weight" would be roughly 50-68 kg. Your doctor can advise based on your height, body composition, and health status.

By 24 weeks (~6 months), you are well into the 2nd trimester. For a normal BMI, an approximate gain can be estimated by the weekly guideline: ~0.4 kg/week in 2nd & 3rd trimesters. If you are about 12 weeks into the 2nd trimester (weeks ~13-24), then 12 x 0.4 ≈ 4.8 kg + first trimester gain (~1-2 kg) = maybe ~6-7 kg total by 24 weeks. This is a rough estimate only.