Birthday Calculator
Compute current age, days until next birthday, total days lived and the day of the week.
Quick answer: Compute current age, days until next birthday, total days lived and the day of the week.
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Frequently asked questions
- Is the birthday calculator free?
- Yes — free with no signup.
- Are my dates uploaded?
- No — every calculation runs in your browser.
- Does it handle leap-year birthdays (Feb 29)?
- We use Feb 29 in leap years; on non-leap years the next birthday lands on Mar 1 of the next year.
- What time zone is the calculation in?
- UTC — so the answer doesn't drift based on where you are when you open the page.
- Can I share the result?
- Use a screenshot — the inputs aren't currently encoded in the URL.