Pregnancy Weight Gain Calculator

Calculate recommended weight gain during pregnancy based on pre-pregnancy BMI (IOM Guidelines).

Unit System

Pre-Pregnancy Weight (kg)

Height (cm)

Current Weight (kg)

Current Week of Pregnancy

Pregnancy Type

Your Weight Status

Pre-Pregnancy BMI

BMI Category

Current Gain

Recommended Weight Gain

Min Total Gain

Max Total Gain

Weekly Rate (2nd/3rd tri)

Status: -

Expected Weight by Week

IOM Weight Gain Guidelines

Underweight (BMI < 18.5): 28-40 lbs (12.5-18 kg)

Normal (BMI 18.5-24.9): 25-35 lbs (11.5-16 kg)

Overweight (BMI 25-29.9): 15-25 lbs (7-11.5 kg)

Obese (BMI 30+): 11-20 lbs (5-9 kg)

Twins: Add approximately 10-15 lbs (4.5-7 kg)

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? Frequently Asked Questions

How accurate is this

This calculator uses standard formulas and provides accurate results for typical use cases. For professional or critical applications, always verify results with certified professionals or official sources.

Is this calculator free to use?

Yes, this Pregnancy Weight Gain Calculator is completely free to use with no registration required. You can use it as many times as needed without any limitations.

Can I use this on mobile devices?

Absolutely! This calculator is fully responsive and works perfectly on smartphones, tablets, and desktop computers.

How do I interpret the results?

The results are displayed clearly with appropriate units. Refer to the About This Calculator section for detailed information.