What age tools are available?

Age calculator, difference calculator, countdown, animal years, retirement planner, life expectancy, biological age quiz, zodiac, planetary age, leap year checker, time zone converter, and more. Each tool provides precise calculations tailored to user inputs.

How accurate are the tools?

Tools account for leap years, time zones, DST, and provide second-level precision. We use advanced algorithms to ensure reliability in all calculations.

Yes, with ARIA labels, keyboard navigation, high contrast, dark mode, and screen reader support. Our design follows WCAG guidelines for inclusivity.

How does leap year affect age calculation?

Leap years add an extra day every four years, and our tool automatically adjusts for this in date differences to provide accurate age in days, months, and years.

What is biological age?

Biological age refers to how old your body is based on health and lifestyle factors, often differing from chronological age. Use our quiz to estimate yours.

Can I calculate age on other planets?

Yes, our planetary age tool uses orbital periods to convert Earth years to ages on planets like Mars or Jupiter, adding a fun educational twist.

How to plan retirement using this tool?

Input your birth date and desired retirement age; the tool estimates retirement year, days left, and years in retirement based on life expectancy data.

What zodiac systems are supported?

We cover Western, Chinese, and basic Vedic zodiac signs, with explanations on how they influence personality and life events.

Is data stored on servers?

No, all calculations are performed client-side for maximum privacy and security. Local storage is used optionally for user convenience.

How to convert human age to animal years?

Select an animal like dog or cat, input your age, and get an equivalent based on species-specific aging rates.

Age Calculator

Calculate your age with precision across multiple units. Supports time zones, DST, leap years. Accessible for all users with keyboard navigation and screen reader support. Our age calculator is designed to provide accurate results by accounting for various factors like leap years, which occur every four years to adjust for the Earth's orbit, and time zones that can affect birthday calculations across different regions. Whether you're calculating your age for personal curiosity, legal purposes, or fun, this tool ensures reliability and ease of use.

Enter Your Date of Birth

Providing your birth date allows the tool to compute your exact age. You can use either the calendar input for quick selection or manual entry for precision. Remember, including time and time zone enhances accuracy, especially for calculations involving hours and minutes.

Calendar Input

Select your birth date: Select your date of birth from the calendar. This method is convenient and reduces errors in date entry.

Birth Time (Optional): Adding birth time allows for more detailed calculations, such as age in hours or minutes.

Time Zone: Choose the time zone of your birth location to account for DST and regional differences.

Manual Input

Manual input is ideal for users who prefer typing dates or need to enter historical dates not easily selectable in calendars.

Day

Month

Year

Calculate Age On (Optional)

Use this to find your age on a specific future or past date, useful for planning events or historical comparisons.

Target Date:

Target Time (Optional):

Time Zone:

Compare With Another Person (Optional)

Compare ages to see differences, great for family or friend comparisons.

Their Birth Date:

Explore Our Other Amazing Tools

Discover a full suite of powerful, free, and accurate age-related tools — all designed with precision, accessibility, and fun in mind.

Age Difference Calculator

Find the exact difference in years, months, days, or even seconds between two dates. Perfect for relationships, family trees, or historical comparisons.

Birthday Countdown

See how many days, hours, and minutes until your next birthday — or anyone else’s. Share the excitement!

Animal Years Converter

Convert human years to dog, cat, or horse years using science-based aging formulas. Breed-specific options available.

Retirement Planner

Plan your retirement: know your retirement age, years left to work, and expected retirement duration based on life expectancy.

Life Expectancy Calculator

Estimate your life expectancy based on country, lifestyle, health habits, and genetics. Updated with global data.

Biological Age Quiz

Is your body younger or older than your actual age? Take this science-backed quiz to find out.

Planetary Age Calculator

How old would you be on Mars, Jupiter, or Pluto? Explore your age across the solar system using real orbital data.

Leap Year Checker

Quickly check if any year is a leap year. Understand century rules and historical exceptions.

Time Zone Age Calculator

Calculate age across time zones with DST support. Ideal for international families or global teams.

All tools are 100% free, private (no data stored), and fully accessible.
Works on phones, tablets, and desktops. No sign-up needed.

Back to Age Calculator

About Our Technology

Our calculators use precise algorithms considering leap years, time zones, DST, and orbital mechanics for fun tools. All computations are client-side for privacy. We leverage modern JavaScript libraries to handle complex date calculations, ensuring that even subtle factors like daylight saving transitions are accurately accounted for. This technology allows users to get reliable results without any server-side processing, enhancing speed and security.

User Guide

Step-by-step guide to using the age calculator and additional tools:

Choose input method: calendar or manual. Calendar is great for quick picks, while manual allows for fine control.
Select time zones for accuracy. This is crucial if you're calculating across different regions or for historical dates.
Calculate in basic, detailed, or extra mode. Basic gives years/months/days, detailed adds hours/minutes, extra includes zodiac and more.
Explore additional tools for more insights, such as planetary age for a cosmic perspective or biological quiz for health insights.
Share or print results. Use the share button to post on social media or copy to clipboard.
For advanced users, combine tools like age difference with retirement planner for comprehensive life planning.
Customize themes with dark mode or high contrast for better visibility in different environments.

For accessibility: Use Tab to navigate, Enter to activate buttons. The site is fully compatible with screen readers like NVDA or VoiceOver.

Fun Facts About Age and Time

Leap years add a day every 4 years; our tool handles them seamlessly to avoid off-by-one errors in long-term calculations.
Average human lifespan is 79 years, but can be 84+ in some countries like Japan due to diet and healthcare.
Dog years: First 2 human years = 21 dog years, then 4 per year. This varies by breed size.
Oldest person: 122 years. What's your planetary age on Jupiter? It could be less than 10 'years' if you're 100 on Earth!
Time zones can make birthdays last 48 hours if traveling across the International Date Line.
Biological age can be 10-15 years younger with healthy habits like exercise and balanced diet.
On Mercury, a year is 88 Earth days - you'd have many birthdays! On Venus, days are longer than years.
The Gregorian calendar, introduced in 1582, skipped 10 days to align with seasons.
Some cultures celebrate 'name days' instead of birthdays, based on saints' days.
Life expectancy has increased by 30 years in the last century due to medical advances.

Tips for Users

For accurate results and better experience with our age calculator tools:

Include time and time zone for precise calculations, especially if birth occurred near midnight.
Use target date for future planning like milestones, anniversaries, or eligibility ages.
Compare with historical figures for fun, e.g., how old was Einstein at your age?
Switch to dark mode for low-light viewing to reduce eye strain during evening use.
High contrast mode for visual impairments ensures text is readable for all users.
Print results for records (no-print elements hidden) to keep physical copies for legal or personal use.
Take the biological quiz annually to track health improvements over time.
Combine animal years with planetary age for unique insights, like your dog's age on Mars.
Use retirement planner with life expectancy for realistic financial goals.
Share results on social media to engage friends in age-related discussions.

User Testimonials

"Best age calculator - love the planetary feature! It made learning about space fun." - Alex

"Accessible and detailed, perfect for my needs as a visually impaired user." - Jordan

"Helped plan my retirement accurately with realistic expectancy estimates." - Sam

"The biological age quiz motivated me to improve my lifestyle." - Emily

"Great for comparing ages in my family tree research." - Michael