Free Age Calculator Online

The Age Calculator is a free online tool that calculates your exact age in years, months, and days from your date of birth, including zodiac sign information.

Yes, it is completely free with no registration required. All calculations happen client-side in your browser.

Yes, the Age Calculator displays your zodiac sign based on your birth date along with your precise age breakdown.

Absolutely. The Age Calculator processes everything client-side in your browser. No data is uploaded to or stored on any server. Your content remains private on your device at all times.

Yes, the Age Calculator is fully responsive and works on smartphones and tablets. You can use it on any device with a modern web browser -- no app download required.

No account or registration is needed. Simply open the Age Calculator in your browser and start using it immediately. There are no sign-up walls or usage restrictions.

The Age Calculator uses industry-standard formulas and algorithms to ensure accurate results. However, for critical financial or medical decisions, always consult a qualified professional.

Simply enter your input in the provided field, adjust any settings to your preference, and the tool will process it instantly. You can then copy the result to your clipboard or download it.

The Age Calculator works in all modern browsers including Chrome, Firefox, Safari, Edge, and Opera. For the best experience, use the latest version of your preferred browser.

Exact age is the elapsed time between a birth date and a target date, but calendars make it tricky because months hold 28 to 31 days and leap years add February 29. The reliable method is to count whole years first, then the leftover whole months, then the remaining days — rather than dividing total days by an average month length, which drifts. For example, someone born on March 10, 2000 is 25 years, 3 months, and 5 days old on June 15, 2025. This tool applies exactly that step-by-step logic, so leap days and uneven months never throw the result off. It also expands the answer into total weeks, hours, minutes, and seconds. Enter your date of birth above to see the full breakdown instantly.

Korean age is a traditional counting system where you are considered 1 year old at birth and gain a year every January 1, rather than on your birthday. So a baby born in December is 1 at birth and turns 2 just weeks later on New Year's Day, even though their international age is only a few weeks. International (or "Western") age counts from 0 at birth and adds a year on each birthday, which is the standard most legal and medical systems use. The gap between the two is usually one or two years depending on how close your birthday falls to January. This calculator shows your Korean age alongside your international age automatically, so you can compare both at a glance. Enter your birth date to see your Korean age.

Your age in years simply counts how many times Earth has orbited the Sun since you were born — one Earth year per lap. Other planets orbit at different speeds, so the same elapsed time equals a different number of their years. Mercury races around the Sun in about 88 Earth days, so you have completed far more Mercurian years than Earth years. Mars is the opposite: a Martian year lasts roughly 687 Earth days, so your age there is less than half your Earth age. The number of days you have lived never changes — only the length of the "year" you divide it by does. The Planets tab in this calculator works out your age across every planet from your total days lived. Enter your birth date to explore your interplanetary ages.

Calendar days count every single day in a range, including Saturdays and Sundays. Business days count only weekdays, skipping every weekend, which is why they are better for project timelines, notice periods, and delivery estimates. For example, a 14-calendar-day span usually contains just 10 business days because it crosses two weekends. The gap widens the longer the period: a 30-day month typically holds around 22 business days. Note that a plain business-day count does not subtract public holidays, since those vary by country and region, so treat it as a working-day baseline rather than an exact work schedule. The Date difference mode in this tool returns both the calendar gap and a business-days total that excludes weekends, alongside total weeks and the years/months/days breakdown. Switch to difference mode and pick two dates to compare them.

A leap day, February 29, only appears once every four years, so people born on that date have a literal birthday far less often than everyone else. That does not mean they age more slowly — their age still increments every single year. In the three out of four years that have no February 29, the birthday is most commonly observed on March 1, the day after February 28, so the new year of age clicks over right on schedule. A few jurisdictions instead use February 28, but March 1 is the most widely used convention. Because this calculator counts elapsed whole years from your birth date rather than waiting for a matching calendar day, a February 29 birthday is handled correctly in every year, leap or not. Enter a leap-day birth date above to see the precise age it returns.