Date of Birth Calculator

A date of birth calculator is a simple online tool that computes your age from your date of birth. By entering your DOB, the calculator instantly determines how many years, months, days, hours, minutes, and seconds have passed since you were born.

Our age from date of birth tool does all the hard work of accounting for leap years, varying month lengths, and time zone differences. All calculations happen entirely in your browser — your date of birth is never sent to any server.

Use this tool to calculate your exact age in various units, track upcoming birthday milestones, or simply satisfy your curiosity. The calculator updates results as you type, with no button clicking required.