About Us

What This Tool Does

Calculate Baby Age is a free, single-purpose tool: enter a baby's date of birth and get their exact age in years, months, weeks, and days, calculated live as you type. No account, no sign-up, no app to install — just an accurate answer to "how old is my baby" the moment you need it.

Why We Built It

Baby age is deceptively easy to get wrong by hand. Months aren't a fixed number of weeks, weeks don't divide evenly into months, and leap years throw off manual counting further still. We built this calculator to do that calendar math properly, every time, instead of leaving parents to estimate.

What Makes It Different

The calculator is deliberately simple: one date field, one live result, no clutter. Everything happens in your browser — the date you enter is never sent to a server. If you want to come back later, the date is remembered in your browser's local storage only, so you don't have to re-enter it, and you can clear it anytime from your browser settings. Alongside the calculator, we also built a zodiac sign guide for parents who are curious what their baby's birth date means for their little personality.

A Note on Accuracy

We aim for the calculator's date math to be exact, and we test it against real calendar edge cases like leap years and month-length differences. That said, this site is a general tool, not a medical service — for anything related to your baby's health or development, please talk to a pediatrician. See our Terms & Conditions for more on this.

Questions or feedback? Get in touch.