Sketch IOM total-gain bands across gestational weeks from booking BMI.
| Lower band | – |
| Upper band | – |
Use this calculator for Institute of Medicine singleton total-gain bands: underweight BMI under 18.5 is 12.5–18 kg, healthy range 11.5–16 kg, overweight 7–11.5 kg, obesity 5–9 kg. The sketch puts about 2 kg in the first 13 weeks, then spreads the rest linearly to week 40. Twin tables and week-by-week SEO clones are omitted. This is not a prescription.
Gain is shown in kilograms (kg) or pounds (lb).
Booking BMI: BMI at the start of pregnancy.
Gestational week: Current gestational week.
Lower band: Lower IOM-style cumulative gain so far.
Upper band: Upper IOM-style cumulative gain so far.
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