🧮 Calculator Tool
How old am I?
Enter your date of birth and get your exact age — in years, months, days, hours and more.
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years old
--Months
--Weeks
--Days
--Hours lived
--Heartbeats (~70/min)
--Nights slept
--Trips around the sun
Next birthday
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How does this age calculator work?
This tool computes your exact age by finding the precise difference between your date of birth and today (or any custom date). It correctly handles leap years and varying month lengths to give you a perfectly accurate result every time.
📅 Exact to the day
Accounts for leap years and different month lengths every single month.
🗓️ Custom target date
Calculate your age as of any past or future date — for legal, school, or medical use.
🎂 Birthday countdown
Automatically shows how many days until your next birthday after every calculation.
⚡ Free & private
Runs entirely in your browser. Zero data sent to any server. No sign-up needed.
Frequently asked questions
How do I calculate my exact age?
Enter your date of birth above and click Calculate. You instantly get your exact age in years, months, days, hours and more — plus fun facts like total heartbeats.
How many days old am I?
After calculating, the Days stat card shows your total age in days. For example, a 25-year-old is approximately 9,131 days old.
Can I calculate my age on a specific past date?
Yes. Use the "Calculate age as of" field to pick any date. This is useful for finding your age on a specific past or future date for legal, school, or insurance purposes.
When is my next birthday?
After calculating, the birthday card at the bottom shows your next birthday's exact date and how many days until it arrives.
Is my date of birth stored or sent anywhere?
Absolutely not. This calculator runs entirely in your browser using JavaScript. Your date of birth is never sent to any server and nothing is stored anywhere.
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