Age & Birthday Calculators

A complete collection of free age and birthday calculators — find your exact chronological age in years, months, and days, discover the day of the week you were born, and predict a child's adult height. Every tool runs instantly in your browser.

Tools

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Pick any calculator below to get started.

Chronological Age Calculator

Calculate exact chronological age in years, months, and days from a date of birth.

Birthday Calculator

Free birthday calculator. Find the day of the week you were born, your exact age, total days alive, and the countdown to your next birthday.

Height Calculator

Free height calculator. Predict a child's adult height from the parents' heights using the mid-parental method, with a predicted value and likely range.

Age Calculator

Free age calculator. Find your exact age in years, months, and days from your date of birth, plus total months, weeks, days, and hours lived.

FAQ

Common Questions

Answers to frequent questions about this collection of tools.