Pregnancy weight gain calculator
See how much weight gain is recommended during pregnancy based on your pre-pregnancy BMI and current week.
IOM (2009) guidelines by pre-pregnancy BMI. Every pregnancy is different - follow your midwife or doctor.
Approximate calculation. The exact amount is confirmed by the Social Insurance Board or the Tax and Customs Board - check the official source.
Sources: Tervisekassa
Last updated: 2026-06-03
How much weight should you gain during pregnancy?
The recommended gain depends on your pre-pregnancy body mass index: the lower the BMI, the higher the recommended gain. In the first trimester the typical gain is only 0.5-2 kg; most weight is added in the second and third trimesters at a steady weekly rate. Twin pregnancies have higher ranges. The table follows the IOM (2009) guidelines used by Estonian antenatal care. Every pregnancy is different - your midwife or doctor tracks and interprets your weight at visits.
Frequently asked questions
What is a normal pregnancy weight gain?+
Starting at normal BMI (18.5-24.9): 11.5-16 kg; underweight: 12.5-18 kg; overweight: 7-11.5 kg; obese: 5-9 kg. Twin pregnancies have higher ranges.
When does the weight rise fastest?+
The first trimester adds only 0.5-2 kg. Most gain happens in the second and third trimesters - about 0.35-0.5 kg per week at normal BMI.
What makes up the pregnancy weight?+
The baby is usually 3-4 kg; the rest is the uterus, placenta, amniotic fluid, extra blood volume, breasts, fluid and fat stores - on average another 8-12 kg.
What if my gain is faster or slower than recommended?+
Discuss it with your midwife or doctor at a visit. A single week is not meaningful - the overall trend matters. Never diet during pregnancy on your own.