# The Age Calculator

> The Age Calculator (theagecalculator.net) is a free suite of privacy-friendly online calculators for working out age, dates and time. All calculations run entirely in the user's browser; no personal data, dates or results are ever stored or transmitted. Every tool accounts for leap years and varying month lengths, so results are exact rather than estimated.

The site is aimed at anyone asking "how old am I?", needing the difference between two dates, counting down to a birthday or event, estimating a pregnancy due date, or finding an exact chronological age for school and assessments.

## Calculators

- [Age Calculator](https://theagecalculator.net/index.html): Your exact age in years, months, days, hours and seconds.
- [Date Difference Calculator](https://theagecalculator.net/date-difference-calculator.html): Count the time between any two dates.
- [Age in Days Calculator](https://theagecalculator.net/age-in-days-calculator.html): Find out exactly how many days you have lived.
- [Pregnancy Due Date Calculator](https://theagecalculator.net/due-date-calculator.html): Estimate your due date and current gestational age.
- [Chronological Age Calculator](https://theagecalculator.net/chronological-age-calculator.html): Precise age for school, testing and assessments.
- [Date ± Days Calculator](https://theagecalculator.net/date-plus-days-calculator.html): What date falls a number of days from another.
- [Birthday Countdown](https://theagecalculator.net/birthday-countdown-calculator.html): Days remaining until your next birthday.
- [Insurance Age Calculator](https://theagecalculator.net/insurance-age-calculator.html): Age Last, Age Nearest and Age Next for life insurance.
- [Couple Age Calculator](https://theagecalculator.net/couple-age-calculator.html): Combined age, age gap and milestones for two people.
- [Birthday Twin Finder](https://theagecalculator.net/birthday-twin-finder.html): Find famous people who share your exact birthday.
- [Working Days Calculator](https://theagecalculator.net/working-days-calculator.html): Business days between two dates, or add/subtract working days, excluding weekends and holidays.
- [Hours / Duration Calculator](https://theagecalculator.net/hours-calculator.html): Hours and minutes between two times or dates, plus add/subtract time, with decimal hours.
- [Day of the Week Calculator](https://theagecalculator.net/day-of-the-week-calculator.html): The weekday for any date, plus day of the year and ISO week number.
- [Exam Age Calculator](https://theagecalculator.net/exam-age-calculator.html): Exact age as on the exam cut-off date and eligibility for bank/UPSC/SSC jobs with category relaxations.
- [Reverse Age Calculator](https://theagecalculator.net/reverse-age-calculator.html): Find your birth year from your age, or your age from a birth year.
- [Week Number Calculator](https://theagecalculator.net/week-number-calculator.html): The ISO-8601 week number for any date, plus the week date range and day of the year.
- [Time Calculator](https://theagecalculator.net/time-calculator.html): Add or subtract hours, minutes and seconds from a time, or add and subtract two durations.
- [UPSC Age Calculator](https://theagecalculator.net/upsc-age-calculator.html): Age as on the UPSC cut-off date and eligibility for Civil Services, ESE and CDS with category relaxations.
- [Government Job Age Calculator](https://theagecalculator.net/government-job-age-calculator.html): Age and eligibility for SSC, Railway, bank and State PSC posts as on the cut-off date.
- [Sleep Calculator](https://theagecalculator.net/sleep-calculator.html): Best bedtimes and wake-up times based on 90-minute sleep cycles.
- [Pet Age Calculator](https://theagecalculator.net/pet-age-calculator.html): Convert a dog or cat's age to human years with a modern, size-aware formula.
- [Driving Licence Age Calculator](https://theagecalculator.net/driving-licence-age-calculator.html): Which Indian driving licence categories you're old enough for — motorcycle, car and commercial.
- [School Admission Age Calculator](https://theagecalculator.net/school-admission-age-calculator.html): Age as on the admission cut-off (usually 31 March) and class eligibility.
- [APY Pension Age Calculator](https://theagecalculator.net/pension-age-calculator.html): Atal Pension Yojana age eligibility, enrolment deadline and contribution years.
- [Date Pattern Calculator](https://theagecalculator.net/date-pattern-calculator.html): Palindrome and repeated-digit date patterns, and the next palindrome date.
- [Doomsday Weekday Calculator](https://theagecalculator.net/doomsday-weekday-calculator.html): Day of the week for any date plus the year's doomsday anchor.
- [Roman Numeral Converter](https://theagecalculator.net/roman-numeral-converter.html): Convert numbers to Roman numerals and back, 1 to 3999.
- [How Many Years Calculator](https://theagecalculator.net/how-many-years-calculator.html): Years between two dates, exact and decimal.
- [Time Card Calculator](https://theagecalculator.net/time-card-calculator.html): Weekly work hours from daily clock-in/out times, with breaks and pay.

## Guides

- [How to Calculate Age Correctly (Step by Step)](https://theagecalculator.net/articles/how-to-calculate-age.html): The simple method behind age calculation, the leap-year traps to avoid, and how to do it by hand or instantly online.
- [How Age Is Calculated Around the World](https://theagecalculator.net/articles/age-calculation-around-the-world.html): Western, East Asian and lunar age systems explained — why your age can differ by up to two years depending on where you are.
- [Chronological Age vs Biological Age](https://theagecalculator.net/articles/chronological-vs-biological-age.html): What each number really measures, why they drift apart, and what the science says you can actually change.
- [Leap Years Explained: Why February Has 29 Days](https://theagecalculator.net/articles/leap-years-explained.html): The simple rule behind leap years, the century exception almost everyone forgets, and how it keeps our calendar in sync.
- [How to Count the Days Until Any Date](https://theagecalculator.net/articles/how-many-days-until.html): A practical guide to counting down to birthdays, holidays, deadlines and events — and the easy way to get it exact.
- [What Generation Am I? Birth Years for Each Generation](https://theagecalculator.net/articles/what-generation-am-i.html): Boomers, Gen X, Millennials, Gen Z and Gen Alpha — the birth-year ranges for each generation and why the edges are fuzzy.
- [How Old Am I If I Was Born in a Given Year?](https://theagecalculator.net/articles/how-old-am-i-if-i-was-born-in.html): Work out your age from just your birth year, see ages for popular birth years in 2026, and learn why the month matters.
- [What Day of the Week Was I Born On?](https://theagecalculator.net/articles/what-day-of-the-week-was-i-born.html): How to find the weekday of any birth date, the simple trick behind it, and what your birth day says (and doesn’t).
- [How Many Days Until Christmas? Counting Down Any Holiday](https://theagecalculator.net/articles/how-many-days-until-christmas.html): How to count down to Christmas and any other holiday accurately, plus the quickest way to get the exact number of days.
- [When Is My Half Birthday? How to Find It](https://theagecalculator.net/articles/half-birthday-calculator-guide.html): What a half birthday is, how to calculate the exact date six months from your birthday, and why people celebrate it.
- [How Old Is My Baby in Weeks and Months?](https://theagecalculator.net/articles/how-old-is-my-baby-in-weeks-months.html): Why newborn age is counted in weeks then months, how the milestones line up, and how to work it out at a glance.
- [When Will I Turn 18, 21 or Any Age?](https://theagecalculator.net/articles/when-will-i-turn-a-certain-age.html): Find the exact date you’ll reach a milestone age like 18 or 21, and how to count down to it from today.
- [Born on February 29: How Leap Day Birthdays Work](https://theagecalculator.net/articles/born-on-february-29-leap-day-birthday.html): How leaplings count their age and birthdays, when they legally turn 18 or 21, and how often a ‘real’ birthday comes around.
- [Your Zodiac Sign and Birthstone by Birth Date](https://theagecalculator.net/articles/zodiac-sign-and-birthstone-by-birthday.html): The date ranges for every star sign and the birthstone for each month — a quick reference by your date of birth.
- [Age Last vs Age Nearest vs Age Next: How Insurers Calculate Your Age](https://theagecalculator.net/articles/insurance-age-explained.html): The three age bases life insurers use, why your insurance age can be a year higher than your real age, and the date it changes.
- [Couple Age Difference: Combined Age, Gaps and the “Double Age” Myth](https://theagecalculator.net/articles/couple-age-difference-explained.html): How to work out a couple’s combined age and exact age gap — and why one partner being “double” the other’s age happens only once, ever.

## Help

- [Frequently Asked Questions](https://theagecalculator.net/faq.html): 100 common questions on age, due dates, date maths, birthday countdowns, insurance age, couple age and birthday twins, with clear answers.


## How-to & reference

- [How-To Guides](https://theagecalculator.net/how-to/): Step-by-step, answer-first guides for every calculation.
- [Glossary](https://theagecalculator.net/glossary.html): 50 definitions of age, date, calendar, actuarial and SEO terms.

## About

- Publisher: Sri Murugan Industries
- Privacy: All calculations are performed client-side in the browser. The site uses Google Analytics for aggregate usage statistics and shows ads via Google AdSense and Adsterra. The dates and values entered into calculators are never collected. See https://theagecalculator.net/privacy.html
- Contact: contactus@theagecalculator.net
- Results can be exported to a professional PDF directly from each calculator.