Reproductive Health Calculators
Pregnancy Weight Gain Calculator
Compare pregnancy weight gain with broad pre-pregnancy BMI guidance.
Pre-pregnancy BMI estimate: 23.9.
Guideline total gain range for this BMI category: 11.5–16 kg.
Multiple pregnancy and individual clinical circumstances require personalized guidance.
How to use this calculator
- Enter height, pre-pregnancy weight, current weight, and pregnancy week.
- Review the live result and use Copy result when you need to share it.
How the calculation works
Pre-pregnancy BMI selects a general singleton-pregnancy total gain range; current gain is current minus starting weight.
Formula
Pre-pregnancy BMI selects a general singleton-pregnancy total gain range; current gain is current minus starting weight.
Step-by-step calculation
- Enter height, pre-pregnancy weight, current weight, and pregnancy week.
- Pre-pregnancy BMI selects a general singleton-pregnancy total gain range; current gain is current minus starting weight.
- Check the displayed result, then copy it if needed.
Worked example
At 165 cm and 65 kg before pregnancy, the BMI falls in the general healthy-weight category.
Risk guidance
Frequently asked questions
Does this tool send my inputs anywhere?
No. The interactive calculation runs in your browser and this site does not submit tool inputs to a backend.
How should I use the result?
Check that the entered units and values match your situation, especially around dates, breaks, and rounding.