Compare · Pregnancy Weight Gain Calculator
Two independent scenarios side by side.
Scenario A
Pregnancy weight gain
Pre-pregnancy BMI
23.3
Normal
Total gain recommended
25–35 lb
Singleton pregnancy · Institute of Medicine
Expected at wk 20
9.4–12.0 lb
Linear catch-up after the 4-lb T1 baseline
Per week (T2 + T3)
0.78–1.15 lb/wk
Recommended weekly gain after week 13
Scenario B
Pregnancy weight gain
Pre-pregnancy BMI
23.3
Normal
Total gain recommended
25–35 lb
Singleton pregnancy · Institute of Medicine
Expected at wk 20
9.4–12.0 lb
Linear catch-up after the 4-lb T1 baseline
Per week (T2 + T3)
0.78–1.15 lb/wk
Recommended weekly gain after week 13