Pregnancy weight gain
How much should you actually gain?
Based on the 2009 Institute of Medicine guidelines — the same numbers your OB uses. We'll show you the recommended range, where you are now, and how it tracks week by week.
Height
ft
in
Pre-pregnancy weight
lb
Current weight
lb
Current week of pregnancy
20
Recommended total · BMI 23.3 · healthy weight
25–35 lb(11.3–15.9 kg)
At week 20, expect roughly 7–12 lb gained so far.
You're tracking
+8.0 lb · on track
Right where you should be. To finish in range, aim for about 0.8–1.4 lb per week for the next 20 weeks.
Recommended range, week by week
Recommended rangeYou, today
How accurate is this, honestly?aboutIOM ranges
AccuracyIOM ranges
These are population-level guidelines from the IOM, not a verdict on your body. Some people gain mostly in the second trimester; some catch up in the third. Twins, gestational diabetes, hyperemesis, and individual metabolism all shift the picture. The most useful thing you can do with this number is bring it to your OB — they have the rest of the context.