How is exact age calculated with months and days?

We compare your birth date to the target date, borrowing months and days when needed. Leap years are handled by using real calendar month lengths, so Feb 29 birthdays age correctly on non-leap years.

What does next birthday countdown show?

It finds the next occurrence of your birth month and day after the target date and shows remaining months, days, hours, minutes and seconds, updating live.

How is zodiac sign determined?

Zodiac is based on your birth month and day using traditional Western astrology date ranges, independent of year.

Why are total hours and seconds live ticking?

Total time lived is calculated from exact birth timestamp midnight to now and updates every second, so you see your age increase in real time with confetti on birthdays.

Can I calculate age on a past or future date?

Yes, change the 'Age At' date. The calculator will show how old you were or will be on that specific date, useful for forms, eligibility and milestones.

age calculator

Age Calculator - How Old Am I? Exact Age in Years, Months, Days | YellowNex WebApp

Age Calculator — How Old Am I?

Exact luxury age calculator with live ticking seconds, timeline journey, zodiac aura and birthday countdown. Enter your date of birth and watch time unfold with confetti magic.

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Exact Age Calculator

LIVE — --:--:--precision: 1s

Date of Birth

Select your birth date. Leap-day magic supported.

Age At — Optional Target Date

Default is today. Useful for visa, school admission, retirement checks.

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Birthday luxury logic: Feb 29 born? On non-leap years we roll to Feb 28 for age math and celebrate on Mar 1 in many regions — you can switch via logic, we handle both internally with calendar-native month lengths.

Quick DOB presets

Your exact age • live

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Enter date of birth to see live ticking age

🎉 Next Birthday

IN • —

--Months

--Days

--Hours

--Sec

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Life Timeline Journey0% of century

Total Months——

Total Weeks—weeks lived

Total Days—incl. leap days

Total Hours—live

Total Minutes—live

Total Seconds—ticking

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—Day of birth

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—Zodiac sign

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—Leap years lived

How to use Age Calculator?

Choose your birth Day Month Year. Optionally set Age At to any future or past date. The engine calculates years-months-days by borrowing days from real calendar months, so February and leap years are precise.

Live ticker: Once calculated, total seconds tick every second using setInterval.
Timeline: Progress bar shows life progress vs 90-year canvas — luxury visual for milestones.
Zodiac & weekday: We derive zodiac from month/day and weekday with toLocaleDateString.
Countdown: Next birthday is computed by rolling birth month/day to next occurrence.

Popular uses

Check eligibility: school, driving licence, voting, retirement.
HR & forms: exact age as on cut-off date.
Fun: total heartbeats approx, zodiac compatibility posts.
Parents: baby age in months/days and next birthday planner.

Formula highlights

Years = TargetYear - BirthYear minus 1 if birthday not yet reached. Months remaining computed via month borrowing, days via last month length. Total days = floor((target - birth) / 86400000). Leap days counted by iterating years and checking Feb 29.