Estimate your pregnancy weight gain

You should gain roughly 15 lbs. during your pregnancy.
Over the last two trimesters you should gain about 2 lbs. every 4 weeks.

How it breaks down

If you gained the average of range above, this is where the weight would go (totals are rounded):

Maternal:
Uterus0.79 lbs.
Breasts0.33 lbs.
Blood1.03 lbs.
Water1.38 lbs.
Fat2.75 lbs.
Subtotal6.28 lbs.
 
Fetal:
Fetus7.5 lbs.
Placenta0.53 lbs.
Amniotic Fluid0.65 lbs.
Subtotal8.68 lbs.
 
Total14.96 lbs.
Source: ACOG. The formula is based on your current size and weight and whether you are underweight, overweight, or normal weight.

IMPORTANT: This is only an estimate. Please consult your healthcare provider for a more detailed description of your recommended weight gain.