Age Calculator

Usage Guide

Pick a birth date and a target date to get an exact age broken down into years, months, and days, along with totals in days, weeks, and months, a countdown to the next birthday, the weekday you were born on, and zodiac signs. The calculation uses the anniversary method: full years first, then months, then days, so it matches the everyday rule that you turn a year older on your birthday.

Examples

• Read the “X years, X months, X days” figure whenever a form asks for an exact age.
• Set the target date to an application date to verify the age on official paperwork.
• For a February 29 birthday, anniversaries in common years land on March 1 automatically.

FAQ

• Why does another site show a different number? Tools differ in how they borrow days across months; this one clamps to each month’s length.
• Does it count the current day? Ages are measured between the two dates you pick, not including the target day itself.
• Is my data uploaded? No. Everything runs locally in your browser.