OhMyCalc

Pregnancy Weight Gain Calculator

Calculate recommended weight gain during pregnancy based on pre-pregnancy BMI and current week.

How to Use the Pregnancy Weight Gain Calculator

  1. Enter your personal measurements (weight, height, age, etc.).
  2. Select any relevant options such as gender or activity level.
  3. Click Calculate or view the instant result.
  4. Review your result and the interpretation or category it falls into.

Quick Reference

FromTo
1st trimesterWeeks 1–12
2nd trimesterWeeks 13–26
3rd trimesterWeeks 27–40
Due date40 weeks (280 days)
Full term37–42 weeks
Preterm< 37 weeks

Use Cases

Formula

Recommended total gain: underweight 12.5–18 kg, normal 11.5–16 kg, overweight 7–11.5 kg, obese 5–9 kg.

Frequently Asked Questions

How to use?
Enter the data and click the calculate button.
Calculation accuracy?
Calculations are performed with high precision.
Is it free?
Yes, all calculators are completely free.