Pregnancy MetricsPregnancy & preconception calculators

Pregnancy Weight Gain Calculator

Enter pre-pregnancy height and weight and choose singleton or twins to see the BMI-based published total range. Current week and weight are optional.

Enter pre-pregnancy measurements and pregnancy type. Current week and weight are optional.

Before pregnancy

Pregnancy type changes the published reference, so this calculator does not choose one for you.

Calculator inputs are processed on this device. Default calculations do not send them to a calculation server, write them into the page URL, or save them to an account or project-controlled database. Read the Privacy Policy.

How this reference is determined

Pre-pregnancy BMI and pregnancy type select a published singleton or twin total gain range. This population reference is not an individual medical target; a current-week singleton estimate is a separate Pregnancy Metrics derived reference, not an official CDC weekly band.

See the Pregnancy Weight Gain Guidelines Guide and our methodology and sources for assumptions, limits, and official guidance.