Frequently asked questions
How is my exact age calculated?
We calculate the difference between your date of birth and today's date, breaking it down into years, months, days, hours, minutes, and seconds — all running live in your browser.
Does my data leave my device?
No. All calculations happen entirely in your browser using JavaScript. Nothing is sent to any server. Your date of birth is never stored or transmitted.
Can I calculate age on a specific past or future date?
Yes — check the "Calculate age as of a specific date" box above the Calculate button to enter a custom reference date.
How are zodiac signs determined?
Western zodiac signs are based on the position of the sun at your date of birth. The 12 signs each cover roughly 30 days of the year based on the tropical zodiac calendar.