Free online age calculator

An age calculator answers a simple question: how old is someone on a given date? Forms, school cutoffs, and eligibility checks often need years, months, and days—not a rough guess from the birth year alone.

Steps

1. Open the age calculator.
2. Enter the date of birth.
3. Optionally set an “as of” date (today, or a future enrollment day).
4. Read years, months, and days from the result.

Everything runs in your browser—no account, and birth dates stay on your device.

When exact age matters

• School or sports age brackets with a cutoff date
• Visa, insurance, or contest eligibility
• Milestone planning (turning 18, 21, or retirement age)
• Comparing two people born close together

If you only need the gap between two arbitrary dates, use date difference instead.

Tips

• Confirm the timezone if the person was born near midnight across a border
• Double-check day/month order when pasting from documents
• Recalculate with the official cutoff date, not “today,” for admissions

Limits

Mewix is not a legal age-verification service. It does not check ID documents or issue certificates—only the arithmetic from the dates you enter.

CTA: Use the free online age calculator.