Birthday Age Calculator

Birthday Age and Countdown

The birthday age calculator converts a birthday into an exact age today or on a selected date.

It also shows birthday details that are useful for profiles, invitations, milestones, and quick personal date checks.

Birthday Details Included

• Exact birthday age: Years, months, and days from the birthday to today or your chosen date.
• Next birthday: The next birthday date and the number of days remaining.
• Birth weekday: The day of the week the birthday fell on.
• Zodiac signs: Western and Chinese zodiac signs from the birthday.

Your Age in Months, Weeks, Days, Hours, and Minutes

Alongside the calendar result, your age is broken down into total months, weeks, days, hours, and minutes lived. These running totals answer questions like how many days you have been alive or how many months old a baby is, and they update the moment you change a date so you can copy the exact figure you need.

When a Birthday Age Calculator Helps

Beyond the exact age, the birthday view answers everyday planning questions:

• Milestone birthdays: See exactly when an 18th, 40th, or 65th birthday lands and how far away it is.
• Party planning: Confirm the weekday of the next birthday before booking a venue or sending invitations.
• Birthday profiles: Get the birth weekday plus Western and Chinese zodiac signs for cards, quizzes, and keepsakes.
• Gift countdowns: Track the days remaining until the next birthday for a surprise or delivery deadline.

Need a particular result? Use the age calculator by date for any past or future day, the exact age calculator for years, months, days, hours, and minutes, or the date difference calculator to find the duration between two dates.

Browser-Based Calculation

Birthday calculations are performed client-side, so your birthday is not uploaded or stored.