Pregnancy Weight Gain Calculator
Calculates safe weight gain goals based on your pre-pregnancy health, following IOM guidelines.
Your Pre-Pregnancy Details
Please ensure all fields have valid, positive values.
Pre-Pregnancy Status
Pre-Pregnancy BMI: —
BMI Status: —
Current Trimester: —
Recommended Weight Gain
| Total Goal | — |
|---|---|
| Gain per Week (2nd/3rd Trimester) | — |
Why Pregnancy Weight Gain is Important
The **Pregnancy Weight Gain Calculator** provides personalized targets based on the **IOM (Institute of Medicine)** guidelines. Gaining the appropriate amount of weight during pregnancy is crucial for minimizing risks such as gestational diabetes, preterm birth, and unnecessary C-sections.
IOM Weight Gain Guidelines (Based on Pre-Pregnancy BMI)
| Pre-Pregnancy Status | BMI Range | Total Recommended Gain (kg) | Weekly Gain Rate (kg) |
|---|---|---|---|
| Underweight | Below 18.5 | 12.5 – 18.0 kg | 0.5 – 0.58 kg |
| Normal Weight | 18.5 – 24.9 | 11.5 – 16.0 kg | 0.42 – 0.5 kg |
| Overweight | 25.0 – 29.9 | 7.0 – 11.5 kg | 0.23 – 0.33 kg |
| Obese | 30.0+ | 5.0 – 9.0 kg | 0.17 – 0.27 kg |
Frequently Asked Questions (FAQ)
How much weight should I gain in the first trimester?
In the first trimester (weeks 1-12), weight gain is usually minimal, often only **0.5 kg to 2.0 kg** in total, regardless of pre-pregnancy BMI. The rapid, consistent weekly weight gain rate applies mostly to the second and third trimesters.