CalcMyBaby is an independent website that gives parents and parents-to-be clear, accurate answers to the number questions of pregnancy and early childhood — free, private and without sign-ups.
What we do
How many weeks pregnant am I? When is my baby due? Is my baby growing well? How long should my baby stay awake? We build calculators that answer these questions using the same methods doctors use, and we explain the reasoning behind every result in plain language.
- Pregnancy: Pregnancy Calculator, Due Date Calculator, Conception Calculator
- Getting Pregnant: Ovulation Calculator, Period Calculator, When to Take a Pregnancy Test
- Baby & Child Age: Baby Age Calculator, Chronological Age Calculator
- Growth & Percentiles: Baby Percentile Calculator
- Feeding & Sleep: Baby Sleep Schedule, Wake Windows
How we make our tools
- Evidence first. Every formula follows published guidance from organizations such as the American College of Obstetricians and Gynecologists (ACOG), the American Academy of Pediatrics (AAP), the World Health Organization (WHO) and the Centers for Disease Control and Prevention (CDC). Each page lists its sources.
- Tested. Our calculations are covered by automated tests against worked examples from those sources.
- Private. Calculations run entirely in your browser. We never receive the dates or measurements you enter.
- Honest about limits. Every estimate comes with an explanation of how accurate it is and when to talk to a professional.
Read our full editorial policy and medical disclaimer.
Get in touch
Spotted an error or have an idea for a new calculator? We’d love to hear from you on our contact page.