Pregnancy Weight Gain Calculator
Enter your pre-pregnancy weight and height to see the recommended total weight gain range for your BMI category.
Pregnancy Weight Gain Calculator
Estimate a healthy pregnancy weight gain range based on your pre-pregnancy BMI.
Recommended pregnancy weight gain varies by pre-pregnancy BMI: those starting underweight are generally advised to gain more, while those starting in a higher BMI category are advised to gain less, for a single (non-twin) pregnancy.
Example
- With the default values shown above, this calculator returns: Pre-Pregnancy BMI ≈ 23.9; Recommended Total Weight Gain: 11.5–16 kg (normal weight).
Frequently Asked Questions
Why does the recommended range depend on starting BMI?
Research shows outcomes for both mother and baby are generally best within these BMI-specific ranges — those starting at a lower BMI have more room to gain, while those starting higher are advised to gain less.
Does this apply to twin pregnancies?
No — twin and higher-order multiple pregnancies have their own, generally higher recommended weight gain ranges; ask your healthcare provider for guidance specific to a multiple pregnancy.