Baby Due Date & Gestational Age Calculator

Calculate your baby's expected due date and gestational age based on your last menstrual period.

Parent guide

How to use this tool

Calculate your baby's expected due date and gestational age based on your last menstrual period.

How to use

Open Baby Due Date & Gestational Age Calculator and enter the fields shown in the form.
Use current measurements or dates and confirm units before reading the result.
Read the interpretation, references, and safety note before using the result for planning.

What the result means

Baby Due Date & Gestational Age Calculator helps parents with this question: Calculate your baby's expected due date and gestational age based on your last menstrual period. Treat the output as an educational planning aid and compare it with real-world context.

References and data notes

Standard pregnancy dating concepts and publicly documented obstetric estimation formulas where applicable.
Pregnancy-related results should be reviewed with qualified maternity care professionals.

Safety note

Use this result for planning and conversation. If symptoms, unusual growth changes, feeding problems, pregnancy concerns, or urgent health questions arise, contact a qualified healthcare professional.

Frequently asked questions

When should I use Baby Due Date & Gestational Age Calculator?

Use it when you want a quick educational estimate for: Calculate your baby's expected due date and gestational age based on your last menstrual period.

What affects the Baby Due Date & Gestational Age Calculator result?

The result depends on the age, dates, measurements, units, reference choice, and assumptions shown in the form.