Calculator tool
The calculator uses Institute of Medicine pregnancy weight-gain ranges also summarized by the CDC. Recommended gain depends on pre-pregnancy BMI and is higher for twin pregnancies.
Review the inputs carefully and treat the output as an estimate. For decisions involving money, taxes, health, law, or security, compare the result with trusted professional guidance when needed.
When should most pregnancy weight gain happen?
Most weight gain occurs in the second and third trimesters. First-trimester gain is usually modest, and individual goals should be set with a healthcare professional.
Does this replace prenatal advice?
No. Weight targets can change with medical history, nausea, diabetes risk, fetal growth, and clinician guidance.
Pregnancy Calculator
Estimate current pregnancy week, due date, trimester, and milestone dates from LMP, due date, conception, ultrasound, or IVF transfer.
Open toolBMI Calculator
Calculate body mass index from height and weight with category guidance.
Open toolDue Date Calculator
Calculate an estimated due date from LMP, conception date, ultrasound gestational age, or IVF embryo transfer.
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