Pregnancy Weight Gain Calculator

Find recommended pregnancy weight gain by pre-pregnancy BMI.

BMI category Normal

Recommended gain 11.5–16 kg

Formula: IOM ranges by pre-pregnancy BMI

Step-by-step with your numbers:

1. Values used:

2. Pre-pregnancy BMI = 22 kg/m²

4. BMI category = Normal

5. Recommended gain = 11.5–16 kg

Did we solve your problem today?

Recommended total weight gain for a single pregnancy depends on your starting BMI (IOM guidelines). Informational only.

The math behind it

Underweight: 12.5–18 kg; normal: 11.5–16; overweight: 7–11.5; obese: 5–9 kg (singleton pregnancy).

BMI 22 (normal) → 11.5–16 kg.

Twins?

Recommended gain is higher; ask your provider.