How is pregnancy weight gain calculated?

Weight gain is estimated using pre-pregnancy BMI and commonly used guideline ranges for each trimester.

Are these weight gain targets exact?

No. The values are general estimates that can vary depending on individual circumstances.

Why does the first trimester have lower weight gain?

Weight gain is typically minimal in early weeks. The second and third trimesters usually see more steady increases.

Pregnancy Weight Gain Calculator

Q: Is my information stored?

No. All calculations happen locally in your browser and nothing is saved or transmitted.

Estimate recommended pregnancy weight gain based on your pre-pregnancy BMI using ranges from widely accepted guidelines.

Pre-pregnancy weight

Unit

Height (cm)

How the Pregnancy Weight Gain Calculator Works

This pregnancy weight gain calculator uses your pre-pregnancy BMI to estimate a healthy weight gain range during pregnancy. The ranges are based on commonly used guidelines that categorize recommendations according to a person's body size before pregnancy. The calculator supports both kilograms and pounds and converts units automatically.

The calculation begins by estimating your BMI using your height and pre-pregnancy weight. Depending on the BMI category, the recommended total weight gain is assigned from a guideline-based range. These categories include underweight, normal weight, overweight, and higher weight ranges. The tool then divides the total recommended gain into trimester-based estimates.

A typical pattern is slower weight gain in the first trimester and steadier gain through the second and third trimesters. This calculator estimates that pattern automatically using commonly referenced weekly gain rates. All calculations run immediately in your browser and nothing is saved or transmitted.

This calculator is often used with related tools such as due date calculators, ovulation trackers, and healthy pregnancy planning tools. It provides general insights that can help with tracking and planning, and it is not a medical decision tool.

Frequently Asked Questions

How is recommended pregnancy weight gain calculated?

The calculation is based on pre-pregnancy BMI. Each BMI category has a general recommended weight gain range for a single pregnancy.

Are these pregnancy weight targets exact?

No. They are general guideline-based ranges and can vary depending on individual factors such as nutrition, health history, and personal recommendations.

Why is weight gain lower in the first trimester?

Early pregnancy generally includes minimal weight change. As the pregnancy progresses, weight typically increases more steadily.

Is my information stored?

No. Everything is calculated locally in your browser only.