BMI During Pregnancy
Gestational weight gain assessment · IOM 2009 Guidelines · South Asian BMI cutoffs
Pre-pregnancy measurements
kg — weight before conception
cm — your standing height
For risk assessment
Current pregnancy
kg — today's weight
Weeks of pregnancy
Single
Twins
Clinical context
⚠ South Asian cutoffs used: Indian women are classified as overweight at BMI ≥ 23 kg/m² and obese at BMI ≥ 25 kg/m² — lower than Western cutoffs. This matters because gestational weight gain targets are based on pre-pregnancy BMI category.
Please enter valid pre-pregnancy weight, height, current weight and gestational age.
—
kg gained
—
—
Pre-preg BMI
—
BMI category
—
Gained so far
—
Target total gain
—
Weight gain vs recommended range at — weeks
0 kg
—
—
—
IOM 2009 total gestational weight gain targets — your category highlighted
| Pre-pregnancy BMI category | BMI range (South Asian) | Total gain (singleton) | Total gain (twins) |
|---|---|---|---|
| Underweight | < 18.5 | 12.5 – 18.0 kg | No specific guideline |
| Normal weight | 18.5 – 22.9 | 11.5 – 16.0 kg | 17.0 – 25.0 kg |
| Overweight | 23.0 – 24.9 | 7.0 – 11.5 kg | 14.0 – 23.0 kg |
| Obese | ≥ 25.0 | 5.0 – 9.0 kg | 11.0 – 19.0 kg |
Expected weight gain by trimester
Nutrition & calorie guidance
Personalised guidance
Clinical flags
ⓘ For clinical guidance only. Not a substitute for physician or dietitian advice.
Gestational weight gain targets per Institute of Medicine (IOM) 2009 report
"Weight Gain During Pregnancy: Reexamining the Guidelines."
South Asian BMI cutoffs per WHO Expert Consultation 2004 (WHO Technical Report Series 894).
Individual targets may differ based on clinical circumstances. Always discuss weight gain
with your obstetrician at every antenatal visit.